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MCUME/MCUME_pico2/picomsx/fmsx.c

3204 wiersze
88 KiB
C
Czysty Bezpośredni odnośnik Wina Historia

#include <string.h>
#include "emuapi.h"
#include "iopins.h"
#include "shared.h"
#include "Z80.h" /* Z80 CPU emulation */
#include "MSX.h"
#include "Sound.h"
#include <stdlib.h>
#include <ctype.h>
//#include <time.h>
#include "bios/cmos.h"
#include "bios/disk.h"
#include "bios/fmpac.h"
#include "bios/italic.h"
#include "bios/kanji.h"
#include "bios/msx.h"
#include "bios/msx2.h"
#include "bios/msx2ext.h"
#include "bios/msx2p.h"
#include "bios/msx2pext.h"
#include "bios/painter.h"
#include "flash_t.h"
static void RefreshLineTx80(byte Y);
static void RefreshLine0(byte Y);
static void RefreshLine1(byte Y);
static void RefreshLine2(byte Y);
static void RefreshLine3(byte Y);
static void RefreshLine4(byte Y);
static void RefreshLine5(byte Y);
static void RefreshLine6(byte Y);
static void RefreshLine7(byte Y);
static void RefreshLine8(byte Y);
static void RefreshLine10(byte Y);
static void RefreshLine12(byte Y);
/** Zero-terminated arrays of disk names for each drive ******/
extern char *Disks[2][MAXDISKS+1];
/**************************************
* Local macros/typedef
**************************************/
#define WIDTH 272
#define HEIGHT 228
#define RGB2INT(R,G,B) ((B)|((int)(G)<<8)|((int)(R)<<16))
typedef byte pixel;
/**************************************
* Local procedures
**************************************/
static void Sprites(byte Y,pixel *Line);
static void ColorSprites(byte Y,byte *ZBuf);
static pixel *RefreshBorder(byte Y,pixel C);
static void ClearLine(pixel *P,pixel C);
static pixel YJKColor(int Y,int J,int K);
/** Internal Functions ***************************************/
/** These functions are defined and internally used by the **/
/** code in MSX.c. **/
/*************************************************************/
byte *LoadROM(const char *Name,int Size,byte *Buf);
byte *LoadCARTROM(const char *Name,int Size,byte *Buf);
int LoadCart(const char *Name,int Slot);
int GuessROM(const byte *Buf,int Size);
void SetMegaROM(int Slot,byte P0,byte P1,byte P2,byte P3);
void MapROM(word A,byte V); /* Switch MegaROM banks */
void SSlot(byte V); /* Switch secondary slots */
void VDPOut(byte R,byte V); /* Write value into a VDP register */
void Printer(byte V); /* Send a character to a printer */
void PPIOut(byte New,byte Old); /* Set PPI bits (key click, etc.) */
void CheckSprites(void); /* Check collisions and 5th sprite */
byte RTCIn(byte R); /* Read RTC registers */
byte SetScreen(void); /* Change screen mode */
word SetIRQ(byte IRQ); /* Set/Reset IRQ */
word StateID(void); /* Compute emulation state ID */
static void RefreshLineF(register byte Y);
static void RefreshLine0(register byte Y);
static void RefreshLine1(register byte Y);
static void RefreshLine2(register byte Y);
static void RefreshLine3(register byte Y);
static void RefreshLine4(register byte Y);
static void RefreshLine5(register byte Y);
static void RefreshLine8(register byte Y);
static void RefreshLine10(register byte Y);
static void RefreshLine12(register byte Y);
//#ifdef NARROW
static void RefreshLine7(register byte Y);
static void RefreshLineTx80(register byte Y);
//#endif
/**************************************
* Local variables
**************************************/
static unsigned int BPal[256],XPal[80],XPal0;
static int FirstLine = 18; /* First scanline in the framebuffer */
/** User-defined parameters for fMSX *************************/
byte Verbose = 1; /* Debug msgs ON/OFF */
byte UPeriod = 2; /* Interrupts/scr. update */
int VPeriod = CPU_VPERIOD; /* CPU cycles per VBlank */
int HPeriod = CPU_HPERIOD; /* CPU cycles per HBlank */
byte SaveCMOS = 0; /* Save CMOS.ROM on exit */
byte SaveSRAM = 0; /* ~ GMASTER2.RAM on exit */
byte MSXVersion = 1; /* 0=MSX1,1=MSX2,2=MSX2+ */
byte JoyTypeA = 1; /* 0=None,1=Joystick, */
byte JoyTypeB = 0; /* 2=MouseAsJstk,3=Mouse */
byte ROMTypeA = MAXMAPPERS; /* MegaROM types */
byte ROMTypeB = MAXMAPPERS;
int RAMPages = 4; /* Number of RAM pages */
int VRAMPages = 2; /* Number of VRAM pages */
byte AutoFire = 0; /* Autofire on [SPACE] */
byte UseDrums = 0; /* Use drms for PSG noise */
byte ExitNow = 0; /* 1 = Exit the emulator */
/** Main hardware: CPU, RAM, VRAM, mappers *******************/
Z80 CPU; /* Z80 CPU state and regs */
byte *VRAM,*VPAGE; /* Video RAM */
byte *RAM[8]; /* Main RAM (8x8kB pages) */
byte *EmptyRAM; /* Empty RAM page (8kB) */
byte *SRAM; /* SRAM (battery backed) */
byte *MemMap[4][4][8]; /* Memory maps [PPage][SPage][Addr] */
byte *RAMData; /* RAM Mapper contents */
byte RAMMapper[4]; /* RAM Mapper state */
byte RAMMask; /* RAM Mapper mask */
byte *ROMData[2]; /* ROM Mapper contents */
byte ROMMapper[2][4]; /* ROM Mappers state */
byte ROMMask[2]; /* ROM Mapper masks */
byte EnWrite[4]; /* 1 if write enabled */
byte PSL[4],SSL[4]; /* Lists of current slots */
byte PSLReg,SSLReg; /* Storage for A8h port and (FFFFh) */
/** Memory blocks to free in TrashMSX() **********************/
byte *Chunks[256]; /* Memory blocks to free */
byte CCount; /* Number of memory blcks */
/** Cartridge files used by fMSX *****************************/
char CartA[128]; //"CARTA.ROM"; /* Cartridge A ROM file */
char *CartB = "CARTB.ROM"; /* Cartridge B ROM file */
/** Disk images used by fMSX *********************************/
char *DiskA = "DRIVEA.DSK"; /* Drive A disk image */
char *DiskB = "DRIVEB.DSK"; /* Drive B disk image */
/** Fixed font used by fMSX **********************************/
char *FontName = "DEFAULT.FNT"; /* Font file for text */
byte *FontBuf; /* Font for text modes */
byte UseFont = 0; /* Use ext. font when 1 */
/** Printer **************************************************/
#ifdef unused
char *PrnName = NULL; /* Printer redirect. file */
int *PrnStream;
#endif
/** Cassette tape ********************************************/
#ifdef unused
char *CasName = "DEFAULT.CAS"; /* Tape image file */
int *CasStream;
#endif
/** Serial port **********************************************/
#ifdef unused
char *ComName = NULL; /* Serial redirect. file */
int *ComIStream;
int *ComOStream;
#endif
/** Kanji font ROM *******************************************/
byte *Kanji; /* Kanji ROM 4096x32 */
int KanLetter; /* Current letter index */
byte KanCount; /* Byte count 0..31 */
/** Keyboard and mouse ***************************************/
byte KeyMap[16]; /* Keyboard map */
byte Buttons[2]; /* Mouse button states */
byte MouseDX[2],MouseDY[2]; /* Mouse offsets */
byte OldMouseX[2],OldMouseY[2]; /* Old mouse coordinates */
byte MCount[2]; /* Mouse nibble counter */
/** General I/O registers: i8255 *****************************/
I8255 PPI; /* i8255 PPI at A8h-ABh */
byte IOReg; /* Storage for AAh port */
/** Sound hardware: PSG, SCC, OPLL ***************************/
AY8910 PSG; /* PSG registers & state */
YM2413 OPLL; /* OPLL registers & state */
SCC SCChip; /* SCC registers & state */
byte SCCOn[2]; /* 1 = SCC page active */
/** Serial I/O hardware: i8251+i8253 *************************/
I8251 SIO; /* SIO registers & state */
/** Real-time clock ******************************************/
byte RTCReg,RTCMode; /* RTC register numbers */
byte RTC[4][13]; /* RTC registers */
/** Video processor ******************************************/
byte *ChrGen,*ChrTab,*ColTab; /* VDP tables (screen) */
byte *SprGen,*SprTab; /* VDP tables (sprites) */
int ChrGenM,ChrTabM,ColTabM; /* VDP masks (screen) */
int SprTabM; /* VDP masks (sprites) */
word VAddr; /* VRAM address in VDP */
byte VKey,PKey,WKey; /* Status keys for VDP */
byte FGColor,BGColor; /* Colors */
byte XFGColor,XBGColor; /* Second set of colors */
byte ScrMode; /* Current screen mode */
byte VDP[64],VDPStatus[16]; /* VDP registers */
byte IRQPending; /* Pending interrupts */
int ScanLine; /* Current scanline */
byte VDPData; /* VDP data buffer */
byte PLatch; /* Palette buffer */
byte ALatch; /* Address buffer */
int Palette[16]; /* Current palette */
/** Places in DiskROM to be patched with ED FE C9 ************/
const word DiskPatches[] = { 0x4010,0x4013,0x4016,0x401C,0x401F,0 };
/** Places in BIOS to be patched with ED FE C9 ***************/
const word BIOSPatches[] = { 0x00E1,0x00E4,0x00E7,0x00EA,0x00ED,0x00F0,0x00F3,0 };
/** Screen Mode Handlers [number of screens + 1] *************/
const void (*RefreshLine[MAXSCREEN+2])(byte Y) =
{
RefreshLine0, /* SCR 0: TEXT 40x24 */
RefreshLine1, /* SCR 1: TEXT 32x24 */
RefreshLine2, /* SCR 2: BLK 256x192 */
RefreshLine3, /* SCR 3: 64x48x16 */
RefreshLine4, /* SCR 4: BLK 256x192 */
RefreshLine5, /* SCR 5: 256x192x16 */
RefreshLine6, /* SCR 6: 512x192x4 */
RefreshLine7, /* SCR 7: 512x192x16 */
RefreshLine8, /* SCR 8: 256x192x256 */
0, /* SCR 9: NONE */
RefreshLine10, /* SCR 10: YAE 256x192 */
RefreshLine10, /* SCR 11: YAE 256x192 */
RefreshLine12, /* SCR 12: YJK 256x192 */
RefreshLineTx80 /* SCR 0: TEXT 80x24 */
};
/** VDP Address Register Masks *******************************/
const struct { byte R2,R3,R4,R5,M2,M3,M4,M5; } MSK[MAXSCREEN+2] =
{
{ 0x7F,0x00,0x3F,0x00,0x00,0x00,0x00,0x00 }, /* SCR 0: TEXT 40x24 */
{ 0x7F,0xFF,0x3F,0xFF,0x00,0x00,0x00,0x00 }, /* SCR 1: TEXT 32x24 */
{ 0x7F,0x80,0x3C,0xFF,0x00,0x7F,0x03,0x00 }, /* SCR 2: BLK 256x192 */
{ 0x7F,0x00,0x3F,0xFF,0x00,0x00,0x00,0x00 }, /* SCR 3: 64x48x16 */
{ 0x7F,0x80,0x3C,0xFC,0x00,0x7F,0x03,0x03 }, /* SCR 4: BLK 256x192 */
{ 0x60,0x00,0x00,0xFC,0x1F,0x00,0x00,0x03 }, /* SCR 5: 256x192x16 */
{ 0x60,0x00,0x00,0xFC,0x1F,0x00,0x00,0x03 }, /* SCR 6: 512x192x4 */
{ 0x20,0x00,0x00,0xFC,0x1F,0x00,0x00,0x03 }, /* SCR 7: 512x192x16 */
{ 0x20,0x00,0x00,0xFC,0x1F,0x00,0x00,0x03 }, /* SCR 8: 256x192x256 */
{ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, /* SCR 9: NONE */
{ 0x20,0x00,0x00,0xFC,0x1F,0x00,0x00,0x03 }, /* SCR 10: YAE 256x192 */
{ 0x20,0x00,0x00,0xFC,0x1F,0x00,0x00,0x03 }, /* SCR 11: YAE 256x192 */
{ 0x20,0x00,0x00,0xFC,0x1F,0x00,0x00,0x03 }, /* SCR 12: YJK 256x192 */
{ 0x7C,0xF8,0x3F,0x00,0x03,0x07,0x00,0x00 } /* SCR 0: TEXT 80x24 */
};
/** MegaROM Mapper Names *************************************/
char *ROMNames[MAXMAPPERS+1] =
{
"GENERIC/8kB","GENERIC/16kB","KONAMI5/8kB",
"KONAMI4/8kB","ASCII/8kB","ASCII/16kB",
"GMASTER2/SRAM","UNKNOWN"
};
static byte JoyState;
static int ik; // joypad key
static int ihk; // I2C keyboard key
static int iusbhk; // USB keyboard key
static int prevhk; // previous keyboard key
static unsigned char linebuffer[WIDTH];
char *Disks[2][MAXDISKS+1]; /* Disk names for each drive */
void emu_KeyboardOnDown(int keymodifer, int key) {
if (key <= 0x7f) iusbhk = key;
else
iusbhk = 0;
}
void emu_KeyboardOnUp(int keymodifer, int key) {
iusbhk = 0;
}
void msx_Init(void)
{
/* Clear everything */
// CartCount=TypeCount=JoyCount=0;
// DiskCount[0]=DiskCount[1]=0;
/* Default disk images */
Disks[0][1]=Disks[1][1]=0;
Disks[0][0]=DiskA;
Disks[1][0]=DiskB;
/* Terminate disk lists and set initial disk names */
// if(DiskCount[0]) { Disks[0][DiskCount[0]]=0;DiskA=Disks[0][0]; }
// if(DiskCount[1]) { Disks[1][DiskCount[1]]=0;DiskB=Disks[1][0]; }
/* Start fMSX! */
// if(!InitMachine()) return(1);
// StartMSX();
// TrashMSX();
// TrashMachine();
emu_printf("Allocating MEM done");
}
void msx_Input(int click) {
ihk = emu_ReadI2CKeyboard();
ik = emu_ReadKeys();
}
void msx_Start(char * Cartridge)
{
emu_printf("init started");
/*** MSX versions: ***/
static const char *Versions[] = { "MSX","MSX2","MSX2+" };
/*** Joystick types: ***/
static const char *JoyTypes[] =
{
"nothing","normal joystick",
"mouse in joystick mode","mouse in real mode"
};
/*** CMOS ROM default values: ***/
static const byte RTCInit[4][13] =
{
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0,40,80,15, 4, 4, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
};
/*** VDP status register states: ***/
static const byte VDPSInit[16] = { 0x9F,0,0x6C,0,0,0,0,0,0,0,0,0,0,0,0,0 };
/*** VDP control register states: ***/
static const byte VDPInit[64] =
{
0x00,0x10,0xFF,0xFF,0xFF,0xFF,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
};
/*** Initial palette: ***/
static const byte PalInit[16][3] =
{
{0x00,0x00,0x00},{0x00,0x00,0x00},{0x20,0xC0,0x20},{0x60,0xE0,0x60},
{0x20,0x20,0xE0},{0x40,0x60,0xE0},{0xA0,0x20,0x20},{0x40,0xC0,0xE0},
{0xE0,0x20,0x20},{0xE0,0x60,0x60},{0xC0,0xC0,0x20},{0xC0,0xC0,0x80},
{0x20,0x80,0x20},{0xC0,0x40,0xA0},{0xA0,0xA0,0xA0},{0xE0,0xE0,0xE0}
};
int *T,I,J,K;
byte *P;
word A;
//FILE *F;
#ifdef HAS_SND
emu_sndInit();
InitSound(22050,0);
#endif
/* Zero everyting */
#ifdef unused
CasStream=PrnStream=ComIStream=ComOStream=NULL;
#endif
ROMData[0]=ROMData[1]=NULL;
FontBuf = NULL;
VRAM = NULL;
SRAM = NULL;
Kanji = NULL;
SaveCMOS = 0;
SaveSRAM = 0;
ExitNow = 0;
CCount = 0;
/* Calculate IPeriod from VPeriod/HPeriod */
if(UPeriod<1) UPeriod=1;
if(HPeriod<CPU_HPERIOD) HPeriod=CPU_HPERIOD;
if(VPeriod<CPU_VPERIOD) VPeriod=CPU_VPERIOD;
CPU.TrapBadOps = Verbose&0x10;
CPU.IPeriod = CPU_H240;
CPU.IAutoReset = 0;
/* Check parameters for validity */
if(MSXVersion>2) MSXVersion=2;
if((RAMPages<(MSXVersion? 8:4))||(RAMPages>256))
RAMPages=MSXVersion? 8:4;
//RAMPages=MSXVersion? 4:4; // PATCH PICO
if((VRAMPages<(MSXVersion? 8:2))||(VRAMPages>8))
VRAMPages=MSXVersion? 8:2;
/* Number of RAM pages should be power of 2 */
/* Calculate RAMMask=(2^RAMPages)-1 */
for(J=1;J<RAMPages;J<<=1);
RAMPages=J;
RAMMask=J-1;
/* Number of VRAM pages should be a power of 2 */
for(J=1;J<VRAMPages;J<<=1);
VRAMPages=J;
/* Initialize ROMMasks to zeroes for now */
ROMMask[0]=ROMMask[1]=0;
/* Joystick types are in 0..3 range */
JoyTypeA&=3;
JoyTypeB&=3;
/* Allocate 16kB for the empty space (scratch RAM) */
if(Verbose)
emu_printf("Allocating 16kB for empty space...");
EmptyRAM=emu_Malloc(0x4000);
memset(EmptyRAM,NORAM,0x4000);
Chunks[CCount++]=EmptyRAM;
/* Reset memory map to the empty space */
for(I=0;I<4;I++)
for(J=0;J<4;J++)
for(K=0;K<8;K++)
MemMap[I][J][K]=EmptyRAM;
/* Allocate VRAMPages*16kB for VRAM */
/* 128k */
if(Verbose) {
emu_printi(VRAMPages*16);
emu_printf("kB for VRAM...");
}
VRAM=emu_Malloc(VRAMPages*0x4000);
memset(VRAM,0x00,VRAMPages*0x4000);
Chunks[CCount++]=VRAM;
/* Allocate RAMPages*16kB for RAM */
if(Verbose) {
emu_printi(RAMPages);
emu_printf("x16kB RAM pages...");
}
RAMData=emu_Malloc(RAMPages*0x4000);
memset(RAMData,NORAM,RAMPages*0x4000);
Chunks[CCount++]=RAMData;
if(Verbose) {
emu_printf("Loading ROMs for");
emu_printf(Versions[MSXVersion]);
}
/* Open/load system ROM(s) */
switch(MSXVersion)
{
case 0:
if(Verbose) emu_printf("Opening MSX.ROM...");
//P=LoadROM("msx/roms/MSX.ROM",0x8000,0);
P=&MSX[0];
if(!P) return(0);
MemMap[0][0][0]=P;
MemMap[0][0][1]=P+0x2000;
MemMap[0][0][2]=P+0x4000;
MemMap[0][0][3]=P+0x6000;
break;
case 1:
if(Verbose) emu_printf("Opening MSX2.ROM...");
//P=LoadROM("msx/roms/MSX2.ROM",0x8000,0);
P=&MSX2[0];
if(!P) return(0);
MemMap[0][0][0]=P;
MemMap[0][0][1]=P+0x2000;
MemMap[0][0][2]=P+0x4000;
MemMap[0][0][3]=P+0x6000;
if(Verbose) emu_printf("Opening MSX2EXT.ROM...");
//P=LoadROM("msx/roms/MSX2EXT.ROM",0x4000,0);
P=&MSX2EXT[0];
if(!P) return(0);
MemMap[3][1][0]=P;
MemMap[3][1][1]=P+0x2000;
break;
case 2:
if(Verbose) emu_printf("Opening MSX2P.ROM...");
//P=LoadROM("msx/roms/MSX2P.ROM",0x8000,0);
P=&MSX2P[0];
if(!P) return(0);
MemMap[0][0][0]=P;
MemMap[0][0][1]=P+0x2000;
MemMap[0][0][2]=P+0x4000;
MemMap[0][0][3]=P+0x6000;
if(Verbose) emu_printf("Opening MSX2PEXT.ROM...");
//P=LoadROM("msx/roms/MSX2PEXT.ROM",0x4000,0);
P=&MSX2PEXT[0];
if(!P) return(0);
MemMap[3][1][0]=P;
MemMap[3][1][1]=P+0x2000;
break;
}
/* Try loading DiskROM */
//P=LoadROM("msx/roms/DISK.ROM",0x4000,0);
P=&DISK[0];
if(P)
{
if(Verbose) emu_printf("Opening DISK.ROM...OK");
MemMap[3][1][2]=P;
MemMap[3][1][3]=P+0x2000;
}
/*
// Apply patches to BIOS
if(Verbose) emu_printf("Patching BIOS: ");
for(J=0;BIOSPatches[J];J++)
{
P=MemMap[0][0][0]+BIOSPatches[J];
P[0]=0xED;P[1]=0xFE;P[2]=0xC9;
}
if(Verbose) emu_printf("OK\n");
// Apply patches to BDOS
if(MemMap[3][1][2]!=EmptyRAM)
{
if(Verbose) emu_printf("Patching BDOS: ");
for(J=0;DiskPatches[J];J++)
{
P=MemMap[3][1][2]+DiskPatches[J]-0x4000;
P[0]=0xED;P[1]=0xFE;P[2]=0xC9;
}
if(Verbose) emu_printf("OK\n");
}
*/
if(Verbose) emu_printf("Loading other ROMs: ");
/* Try loading CMOS memory contents */
/*
if(LoadROM("msx/roms/CMOS.ROM",sizeof(RTC),(byte *)RTC))
{
if(Verbose) emu_printf("CMOS.ROM..");
}
else memcpy(RTC,RTCInit,sizeof(RTC));
*/
/* Try loading Kanji alphabet ROM */
/*
if(Kanji=LoadROM("msx/roms/KANJI.ROM",0x20000,0))
{
if(Verbose) emu_printf("KANJI.ROM..");
}
*/
/* Try loading RS232 support ROM */
//P=LoadROM("msx/roms/RS232.ROM..",0x4000,0);
/*
P=&RS232[0];
if(P)
{
if(Verbose) emu_printf("RS232.ROM..");
MemMap[3][0][2]=P;
MemMap[3][0][3]=P+0x2000;
}
*/
/* Try loading FM-PAC support ROM */
//P=LoadROM("msx/roms/FMPAC.ROM",0x4000,0);
P=&FMPAC[0];
if(P)
{
if(Verbose) emu_printf("FMPAC.ROM..");
MemMap[3][3][2]=P;
MemMap[3][3][3]=P+0x2000;
}
if(Verbose) emu_printf("OK\n");
/* Loading cartridge into slot A... */
strcpy(CartA, "CARTA.ROM");
if (Cartridge != NULL)
strcpy(CartA, Cartridge);
LoadCart(CartA,0);
J=(ROMMask[0]+1)*8192;
/* Guess mapper is not given */
if((ROMTypeA>=MAXMAPPERS)&&(J>0x8000))
{
ROMTypeA=GuessROM(ROMData[0],J);
if(Verbose) {
emu_printf("Cartridge A: Guessed");
emu_printf(ROMNames[ROMTypeA]);
}
}
/* For Generic/16kB carts, set ROM pages as 0:1:N-2:N-1 */
if((ROMTypeA==1)&&(J>0x8000))
SetMegaROM(0,0,1,ROMMask[0]-1,ROMMask[0]);
/* Loading cartridge into slot B... */
LoadCart(CartB,1);
J=(ROMMask[1]+1)*8192;
/* Guess mapper is not given */
if((ROMTypeB>=MAXMAPPERS)&&(J>0x8000))
{
ROMTypeB=GuessROM(ROMData[1],J);
if(Verbose) {
emu_printf("Cartridge B: Guessed");
emu_printf(ROMNames[ROMTypeB]);
}
}
/* For Generic/16kB carts, set ROM pages as 0:1:N-2:N-1 */
if((ROMTypeB==1)&&(J>0x8000))
SetMegaROM(1,0,1,ROMMask[1]-1,ROMMask[1]);
/* For GameMaster2, allocate and load SRAM */
if((ROMTypeA==6)||(ROMTypeB==6))
{
if(Verbose) emu_printf("Allocating 16kB for GameMaster2 SRAM...");
SRAM=emu_Malloc(0x4000);
/* Erase SRAM and add it to the list of mallocs */
memset(SRAM,NORAM,0x4000);
Chunks[CCount++]=SRAM;
#ifdef unused
/* Try loading SRAM data form disk */
if(!(F=fopen("GMASTER2.RAM","rb"))) {
emu_printf("failed opening");
}
else
{
if(Verbose) emu_printf("loading GMASTER2.RAM...");
if(fread(SRAM,1,0x2000,F)!=0x2000)
{
emu_printf("failed");
}
else
{
/* Mirror GameMaster2 SRAM as needed */
memcpy(SRAM+0x2000,SRAM+0x1000,0x1000);
memcpy(SRAM+0x3000,SRAM+0x1000,0x1000);
memcpy(SRAM+0x1000,SRAM,0x1000);
}
/* Done with the file */
fclose(F);
}
#endif
}
/* Load MSX2-dependent cartridge ROMs: MSXDOS2 and PAINTER */
if(MSXVersion>0)
{
/* Find an empty slot */
if(MemMap[1][0][2]==EmptyRAM) J=1;
else if(MemMap[2][0][2]==EmptyRAM) J=2;
else J=0;
/* Try loading MSXDOS2 cartridge, if slot */
/* found and DiskROM present */
if(J&&(MemMap[3][1][2]!=EmptyRAM))
{
if(J==2) ROMTypeB=1; else ROMTypeA=1;
if(LoadCart("MSXDOS2.ROM",J-1))
SetMegaROM(J-1,0,1,ROMMask[J-1]-1,ROMMask[J-1]);
}
/* Find an empty slot */
if(MemMap[1][0][2]==EmptyRAM) J=1;
else if(MemMap[2][0][2]==EmptyRAM) J=2;
else J=0;
/* Try loading PAINTER ROM if slot found */
if(J) LoadCart("PAINTER.ROM",J-1);
}
/* Try loading font */
if(Verbose) {
emu_printf("Loading font...");
emu_printf(FontName);
}
//FontBuf=LoadROM(FontName,0x800,0);
#ifdef unused
/* Open stream for a printer */
if(!PrnName) PrnStream=stdout;
else
{
if(Verbose) printf("Redirecting printer output to %s...",PrnName);
if(!(PrnStream=fopen(PrnName,"wb"))) PrnStream=stdout;
}
#endif
#ifdef unused
/* Open streams for serial IO */
if(!ComName) { ComIStream=stdin;ComOStream=stdout; }
else
{
if(Verbose) printf("Redirecting serial I/O to %s...",ComName);
if(!(ComOStream=ComIStream=fopen(ComName,"r+b")))
{ ComIStream=stdin;ComOStream=stdout; }
}
#endif
/* Open disk images */
#ifdef DISK
if(ChangeDisk(0,DiskA))
if(Verbose) {
emu_printf("Inserting floppy into drive A");
emu_printf(DiskA);
}
if(ChangeDisk(1,DiskB))
if(Verbose) {
emu_printf("Inserting floppy into drive B");
emu_printf(DiskB);
}
#endif /* DISK */
#ifdef unused
/* Open casette image */
if(CasName)
if(CasStream=fopen(CasName,"r+b"))
if(Verbose) {
emu_printf("Inserting tape");
emu_printf(CasName);
}
#endif
if(Verbose)
{
emu_printf("Attaching joystick port A");
emu_printf(JoyTypes[JoyTypeA]);
emu_printf("Attaching joystick port B");
emu_printf(JoyTypes[JoyTypeB]);
emu_printf("Initializing memory mappers...");
}
for(J=0;J<4;J++)
{
EnWrite[J]=0; /* Write protect ON for all slots */
PSL[J]=SSL[J]=0; /* PSL=0:0:0:0, SSL=0:0:0:0 */
MemMap[3][2][J*2] = RAMData+(3-J)*0x4000; /* RAMMap=3:2:1:0 */
MemMap[3][2][J*2+1] = MemMap[3][2][J*2]+0x2000;
RAMMapper[J] = 3-J;
RAM[J*2] = MemMap[0][0][J*2]; /* Setting RAM */
RAM[J*2+1] = MemMap[0][0][J*2+1];
}
if(Verbose) emu_printf("Initializing VDP, PSG, OPLL, SCC, and CPU...");
/* Initialize palette */
for(J=0;J<16;J++)
{
Palette[J]=RGB2INT(PalInit[J][0],PalInit[J][1],PalInit[J][2]);
SetColor(J,PalInit[J][0],PalInit[J][1],PalInit[J][2]);
}
/* Reset mouse coordinates/counters */
for(J=0;J<2;J++)
Buttons[J]=MouseDX[J]=MouseDY[J]=OldMouseX[J]=OldMouseY[J]=MCount[J]=0;
/* Initialize sound logging */
//InitMIDI("SndName");
/* Reset sound chips */
Reset8910(&PSG,0);
ResetSCC(&SCChip,AY8910_CHANNELS);
Reset2413(&OPLL,AY8910_CHANNELS);
Sync8910(&PSG,AY8910_SYNC);
SyncSCC(&SCChip,SCC_SYNC);
Sync2413(&OPLL,YM2413_SYNC);
/* Reset serial I/O */
#ifdef unused
Reset8251(&SIO,ComIStream,ComOStream);
#else
Reset8251(&SIO,NULL,NULL);
#endif
/* Reset PPI chips and slot selectors */
Reset8255(&PPI);
PPI.Rout[0]=PSLReg=0x00;
PPI.Rout[2]=IOReg=0x00;
SSLReg=0x00;
memcpy(VDP,VDPInit,sizeof(VDP));
memcpy(VDPStatus,VDPSInit,sizeof(VDPStatus));
memset(KeyMap,0xFF,16); /* Keyboard */
IRQPending=0x00; /* No IRQs pending */
SCCOn[0]=SCCOn[1]=0; /* SCCs off for now */
RTCReg=RTCMode=0; /* Clock registers */
KanCount=0;KanLetter=0; /* Kanji extension */
ChrTab=ColTab=ChrGen=VRAM; /* VDP tables */
SprTab=SprGen=VRAM;
ChrTabM=ColTabM=ChrGenM=SprTabM=~0; /* VDP addr. masks */
VPAGE=VRAM; /* VRAM page */
FGColor=BGColor=XFGColor=XBGColor=0; /* VDP colors */
ScrMode=0; /* Screen mode */
VKey=PKey=1;WKey=0; /* VDP keys */
VAddr=0x0000; /* VRAM access addr */
ScanLine=0; /* Current scanline */
VDPData=NORAM; /* VDP data buffer */
UseFont=0; /* Extern. font use */
/* Set "V9958" VDP version for MSX2+ */
if(MSXVersion>=2) VDPStatus[1]|=0x04;
/* Reset CPU */
ResetZ80(&CPU);
/* Done with initialization */
if(Verbose)
{
emu_printi(HPeriod);
emu_printf("CPU cycles per HBlank");
emu_printi(VPeriod);
emu_printf("CPU cycles per VBlank");
emu_printi(VPeriod/HPeriod);
emu_printf("scanlines");
}
/* Start execution of the code */
if(Verbose) emu_printf("RUNNING ROM CODE...\n");
A=RunZ80(&CPU);
emu_printf("init done");
}
#define INV_KEY {255,255}
struct { byte Pos,Mask; } Keys[] =
{
/* 0x00 */ INV_KEY,
/* 0x01 */ INV_KEY,
/* 0x02 */ INV_KEY,
/* 0x03 */ INV_KEY,
/* 0x04 */ INV_KEY,
/* 0x05 */ INV_KEY,
/* 0x06 */ INV_KEY,
/* 0x07 */ INV_KEY,
/* 0x08 */ INV_KEY,
/* 0x09 */ INV_KEY, // tab
/* 0x0A */ INV_KEY,
/* 0x0B */ INV_KEY,
/* 0x0C */ INV_KEY,
/* 0x0D */ {7,0x80}, // enter
/* 0x0E */ INV_KEY,
/* 0x0F */ INV_KEY,
/* 0x10 */ INV_KEY,
/* 0x11 */ INV_KEY,
/* 0x12 */ INV_KEY,
/* 0x13 */ INV_KEY,
/* 0x14 */ INV_KEY,
/* 0x15 */ INV_KEY,
/* 0x16 */ INV_KEY,
/* 0x17 */ INV_KEY,
/* 0x18 */ INV_KEY,
/* 0x19 */ INV_KEY,
/* 0x1A */ INV_KEY,
/* 0x1B */ INV_KEY, // esc
/* 0x1C */ INV_KEY,
/* 0x1D */ INV_KEY,
/* 0x1E */ INV_KEY,
/* 0x1F */ INV_KEY,
/* 0x20 */ {8,0x01}, // space
/* 0x21 */ INV_KEY, // ! exclamation mark
/* 0x22 */ INV_KEY, // " double quote
/* 0x23 */ INV_KEY, // # dies
/* 0x24 */ INV_KEY, // $ dollar
/* 0x25 */ INV_KEY, // % percent
/* 0x26 */ INV_KEY, // & ampercent
/* 0x27 */ INV_KEY, // ' singlequote
/* 0x28 */ INV_KEY, // ( bracket left
/* 0x29 */ INV_KEY, // ) bracket right
/* 0x2A */ INV_KEY, // * mult
/* 0x2B */ INV_KEY, // + plus
/* 0x2C */ {2,0x04}, // , comma
/* 0x2D */ INV_KEY, // - minus
/* 0x2E */ INV_KEY, // . period
/* 0x2F */ INV_KEY, // / slash
/* 0x30 */ {0,0x01}, //'0'
/* 0x31 */ {0,0x02}, //'1'
/* 0x32 */ {0,0x04}, //'2'
/* 0x33 */ {0,0x08}, //'3'
/* 0x34 */ {0,0x10}, //'4'
/* 0x35 */ {0,0x20}, //'5'
/* 0x36 */ {0,0x40}, //'6'
/* 0x37 */ {0,0x80}, //'7'
/* 0x38 */ {1,0x01}, //'8'
/* 0x39 */ {1,0x02}, //'9'
/* 0x3A */ INV_KEY, // : colon
/* 0x3B */ INV_KEY, // ; semi colon
/* 0x3C */ INV_KEY, // <
/* 0x3D */ INV_KEY, // = equal
/* 0x3E */ INV_KEY, // >
/* 0x3F */ INV_KEY, // ?
/* 0x40 */ INV_KEY, // @
/* 0x41 */ {2,0x40}, //'A'
/* 0x42 */ {2,0x80}, //'B'
/* 0x43 */ {3,0x01}, //'C'
/* 0x44 */ {3,0x02}, //'D'
/* 0x45 */ {3,0x04}, //'E'
/* 0x46 */ {3,0x08}, //'F'
/* 0x47 */ {3,0x10}, //'G'
/* 0x48 */ {3,0x20}, //'H'
/* 0x49 */ {3,0x40}, //'I'
/* 0x4A */ {3,0x80}, //'J'
/* 0x4B */ {4,0x01}, //'K'
/* 0x4C */ {4,0x02}, //'L'
/* 0x4D */ {4,0x04}, //'M'
/* 0x4E */ {4,0x08}, //'N'
/* 0x4F */ {4,0x10}, //'O'
/* 0x50 */ {4,0x20}, //'P'
/* 0x51 */ {4,0x40}, //'Q'
/* 0x52 */ {4,0x80}, //'R'
/* 0x53 */ {5,0x01}, //'S'
/* 0x54 */ {5,0x02}, //'T'
/* 0x55 */ {5,0x04}, //'U'
/* 0x56 */ {5,0x08}, //'V'
/* 0x57 */ {5,0x10}, //'W'
/* 0x58 */ {5,0x20}, //'X'
/* 0x59 */ {5,0x40}, //'Y'
/* 0x5A */ {5,0x80}, //'Z'
/* 0x5B */ INV_KEY, // square bracket open
/* 0x5C */ INV_KEY, // backslach
/* 0x5D */ INV_KEY, // square braquet close
/* 0x5E */ INV_KEY, // ^ circonflex
/* 0x5F */ INV_KEY, // _ undescore
/* 0x60 */ INV_KEY, // `backquote
/* 0x61 */ {2,0x40}, //'a'
/* 0x62 */ {2,0x80}, //'b'
/* 0x63 */ {3,0x01}, //'c'
/* 0x64 */ {3,0x02}, //'d'
/* 0x65 */ {3,0x04}, //'e'
/* 0x66 */ {3,0x08}, //'f'
/* 0x67 */ {3,0x10}, //'g'
/* 0x68 */ {3,0x20}, //'h'
/* 0x69 */ {3,0x40}, //'i'
/* 0x6A */ {3,0x80}, //'j'
/* 0x6B */ {4,0x01}, //'k'
/* 0x6C */ {4,0x02}, //'l'
/* 0x6D */ {4,0x04}, //'m'
/* 0x6E */ {4,0x08}, //'n'
/* 0x6F */ {4,0x10}, //'o'
/* 0x70 */ {4,0x20}, //'p'
/* 0x71 */ {4,0x40}, //'q'
/* 0x72 */ {4,0x80}, //'r'
/* 0x73 */ {5,0x01}, //'s'
/* 0x74 */ {5,0x02}, //'t'
/* 0x75 */ {5,0x04}, //'u'
/* 0x76 */ {5,0x08}, //'v'
/* 0x77 */ {5,0x10}, //'w'
/* 0x78 */ {5,0x20}, //'x'
/* 0x79 */ {5,0x40}, //'y'
/* 0x7A */ {5,0x80}, //'z'
/* 0x7B */ INV_KEY, // curly bracket open
/* 0x7C */ INV_KEY, // or
/* 0x7D */ INV_KEY, // curly bracket close
/* 0x7E */ INV_KEY, // tilt
/* 0x7F */ {7,0x20}, // backspace
/* 0xC0 */ INV_KEY,
/* 0xC1 */ INV_KEY,
/* 0xC2 */ INV_KEY, // F1
/* 0xC3 */ INV_KEY, // F2
/* 0xC4 */ INV_KEY, // F3
/* 0xC5 */ INV_KEY, // F4
/* 0xC6 */ INV_KEY, // F5
/* 0xC7 */ INV_KEY, // F6
/* 0xC8 */ INV_KEY, // F7
/* 0xC9 */ INV_KEY, // F8
/* 0xCA */ INV_KEY, // F9
/* 0xCB */ INV_KEY, // F10
/* 0xCC */ INV_KEY,
/* 0xCD */ INV_KEY,
/* 0xCE */ INV_KEY,
/* 0xCF */ INV_KEY,
/* 0xD0 */ INV_KEY,
/* 0xD1 */ INV_KEY,
/* 0xD2 */ INV_KEY,
/* 0xD3 */ INV_KEY,
/* 0xD4 */ INV_KEY, // DEL
/* 0xD5 */ INV_KEY,
/* 0xD6 */ INV_KEY,
/* 0xD7 */ INV_KEY, // U
/* 0xD8 */ INV_KEY, // L
/* 0xD9 */ INV_KEY, // R
/* 0xDA */ INV_KEY, // D
/* 0xDB */ INV_KEY,
/* 0xDC */ INV_KEY,
/* 0xDD */ INV_KEY,
/* 0xDE */ INV_KEY,
/* 0xDF */ INV_KEY
};
void msx_Step(void) {
int k = ik;
int hk = ihk;
if (iusbhk) hk = iusbhk;
JoyState = 0;
if (k & MASK_JOY2_DOWN) JoyState|=0x02;
if (k & MASK_JOY2_UP) JoyState|=0x01;
if (k & MASK_JOY2_RIGHT) JoyState|=0x04;
if (k & MASK_JOY2_LEFT) JoyState|=0x08;
if (k & MASK_JOY2_BTN) JoyState|=0x10;
if (k & MASK_KEY_USER2) JoyState|=0x20;
if (hk != 0) {
//emu_printh(hk);
KeyMap[Keys[hk].Pos] &=~ Keys[hk].Mask;
}
else {
memset(KeyMap,0xFF,16);
}
RunZ80(&CPU);
emu_DrawVsync();
}
#ifdef HAS_SND
static int wave[256];
#endif
void SND_Process(void *stream, int len) {
#ifdef HAS_SND
audio_sample * snd_buf = (audio_sample *)stream;
memset(wave,0,256*sizeof(wave[0]));
RenderAudio(&wave[0], len);
for (int i = 0; i< len; i++ )
*snd_buf++ = (wave[i]/16+32767)>>8;
#endif
}
void SetColor(byte N,byte R,byte G,byte B)
{
XPal[N] = N;
emu_SetPaletteEntry(R,G,B,N);
}
void Keyboard(void)
{
}
byte Joystick(register byte N) { return(JoyState); }
/** Mouse() **************************************************/
/** Query coordinates of a mouse connected to port N. **/
/** Returns F2.F1.Y.Y.Y.Y.Y.Y.Y.Y.X.X.X.X.X.X.X.X. **/
/*************************************************************/
int Mouse(register byte N)
{
return(0);
}
/** ClearLine() **********************************************/
/** Clear 256 pixels from P with color C. **/
/*************************************************************/
static void ClearLine(register pixel *P,register pixel C)
{
register int J;
for(J=0;J<256;J++) P[J]=C;
}
/** YJKColor() ***********************************************/
/** Given a color in YJK format, return the corresponding **/
/** palette entry. **/
/*************************************************************/
static pixel YJKColor(register int Y,register int J,register int K)
{
register int R,G,B;
R=Y+J;
G=Y+K;
B=((5*Y-2*J-K)/4);
R=R<0? 0:R>31? 31:R;
G=G<0? 0:G>31? 31:G;
B=B<0? 0:B>31? 31:B;
return(BPal[(R&0x1C)|((G&0x1C)<<3)|(B>>3)]);
}
/** RefreshBorder() ******************************************/
/** This function is called from RefreshLine#() to refresh **/
/** the screen border. It returns a pointer to the start of **/
/** scanline Y in FB or 0 if scanline is beyond FB. **/
/*************************************************************/
pixel *RefreshBorder(register byte Y,register pixel C)
{
register pixel *P;
register int H;
/* First line number in the buffer */
if(!Y) FirstLine=(ScanLines212? 8:18)+VAdjust;
/* Return 0 if we've run out of the screen buffer due to overscan */
if(Y+FirstLine>=HEIGHT) return(0);
/* Set up the transparent color */
XPal[0]=(!BGColor||SolidColor0)? XPal0:XPal[BGColor];
/* Start of the buffer */
P=(pixel *)&linebuffer[0];
/* Paint top of the screen */
//if(!Y) for(H=WIDTH*FirstLine-1;H>=0;H--) P[H]=C;
/* Start of the line */
//P+=WIDTH*(FirstLine+Y);
/* Paint left/right borders */
for(H=(WIDTH-256)/2+HAdjust;H>0;H--) P[H-1]=C;
for(H=(WIDTH-256)/2-HAdjust;H>0;H--) P[WIDTH-H]=C;
/* Paint bottom of the screen */
//H=ScanLines212? 212:192;
//if(Y==H-1) for(H=WIDTH*(HEIGHT-H-FirstLine+1)-1;H>=WIDTH;H--) P[H]=C;
/* Return pointer to the scanline in FB */
return(P+(WIDTH-256)/2+HAdjust);
}
/** Sprites() ************************************************/
/** This function is called from RefreshLine#() to refresh **/
/** sprites in SCREENs 1-3. **/
/*************************************************************/
void Sprites(register byte Y,register pixel *Line)
{
register pixel *P,C;
register byte H,*PT,*AT;
register unsigned int M;
register int L,K;
/* Assign initial values before counting */
H=Sprites16x16? 16:8;
C=0;M=0;L=0;
AT=SprTab-4;
Y+=VScroll;
/* Count displayed sprites */
do
{
M<<=1;AT+=4;L++; /* Iterating through SprTab */
K=AT[0]; /* K = sprite Y coordinate */
if(K==208) break; /* Iteration terminates if Y=208 */
if(K>256-H) K-=256; /* Y coordinate may be negative */
/* Mark all valid sprites with 1s, break at MAXSPRITE1 sprites */
if((Y>K)&&(Y<=K+H)) { M|=1;C++;if(C==MAXSPRITE1) break; }
}
while(L<32);
/* Draw all marked sprites */
for(;M;M>>=1,AT-=4)
if(M&1)
{
C=AT[3]; /* C = sprite attributes */
L=C&0x80? AT[1]-32:AT[1]; /* Sprite may be shifted left by 32 */
C&=0x0F; /* C = sprite color */
if((L<256)&&(L>-H)&&C)
{
K=AT[0]; /* K = sprite Y coordinate */
if(K>256-H) K-=256; /* Y coordinate may be negative */
P=Line+L;
PT=SprGen+((int)(H>8? AT[2]&0xFC:AT[2])<<3)+Y-K-1;
C=XPal[C];
/* Mask 1: clip left sprite boundary */
K=L>=0? 0x0FFFF:(0x10000>>-L)-1;
/* Mask 2: clip right sprite boundary */
if(L>256-H) K^=((0x00200>>(H-8))<<(L-257+H))-1;
/* Get and clip the sprite data */
K&=((int)PT[0]<<8)|(H>8? PT[16]:0x00);
/* Draw left 8 pixels of the sprite */
if(K&0xFF00)
{
if(K&0x8000) P[0]=C;if(K&0x4000) P[1]=C;
if(K&0x2000) P[2]=C;if(K&0x1000) P[3]=C;
if(K&0x0800) P[4]=C;if(K&0x0400) P[5]=C;
if(K&0x0200) P[6]=C;if(K&0x0100) P[7]=C;
}
/* Draw right 8 pixels of the sprite */
if(K&0x00FF)
{
if(K&0x0080) P[8]=C; if(K&0x0040) P[9]=C;
if(K&0x0020) P[10]=C;if(K&0x0010) P[11]=C;
if(K&0x0008) P[12]=C;if(K&0x0004) P[13]=C;
if(K&0x0002) P[14]=C;if(K&0x0001) P[15]=C;
}
}
}
}
/** ColorSprites() *******************************************/
/** This function is called from RefreshLine#() to refresh **/
/** color sprites in SCREENs 4-8. The result is returned in **/
/** ZBuf, whose size must be 304 bytes (32+256+16). **/
/*************************************************************/
void ColorSprites(register byte Y,byte *ZBuf)
{
register byte C,H,J,OrThem;
register byte *P,*PT,*AT;
register int L,K;
register unsigned int M;
/* Clear ZBuffer and exit if sprites are off */
memset(ZBuf+32,0,256);
if(SpritesOFF) return;
/* Assign initial values before counting */
H=Sprites16x16? 16:8;
C=0;M=0;L=0;
AT=SprTab-4;
OrThem=0x00;
/* Count displayed sprites */
do
{
M<<=1;AT+=4;L++; /* Iterating through SprTab */
K=AT[0]; /* Read Y from SprTab */
if(K==216) break; /* Iteration terminates if Y=216 */
K=(byte)(K-VScroll); /* Sprite's actual Y coordinate */
if(K>256-H) K-=256; /* Y coordinate may be negative */
/* Mark all valid sprites with 1s, break at MAXSPRITE2 sprites */
if((Y>K)&&(Y<=K+H)) { M|=1;C++;if(C==MAXSPRITE2) break; }
}
while(L<32);
/* Draw all marked sprites */
for(;M;M>>=1,AT-=4)
if(M&1)
{
K=(byte)(AT[0]-VScroll); /* K = sprite Y coordinate */
if(K>256-H) K-=256; /* Y coordinate may be negative */
J=Y-K-1;
C=SprTab[-0x0200+((AT-SprTab)<<2)+J];
OrThem|=C&0x40;
if(C&0x0F)
{
PT=SprGen+((int)(H>8? AT[2]&0xFC:AT[2])<<3)+J;
P=ZBuf+AT[1]+(C&0x80? 0:32);
C&=0x0F;
J=PT[0];
if(OrThem&0x20)
{
if(J&0x80) P[0]|=C;if(J&0x40) P[1]|=C;
if(J&0x20) P[2]|=C;if(J&0x10) P[3]|=C;
if(J&0x08) P[4]|=C;if(J&0x04) P[5]|=C;
if(J&0x02) P[6]|=C;if(J&0x01) P[7]|=C;
if(H>8)
{
J=PT[16];
if(J&0x80) P[8]|=C; if(J&0x40) P[9]|=C;
if(J&0x20) P[10]|=C;if(J&0x10) P[11]|=C;
if(J&0x08) P[12]|=C;if(J&0x04) P[13]|=C;
if(J&0x02) P[14]|=C;if(J&0x01) P[15]|=C;
}
}
else
{
if(J&0x80) P[0]=C;if(J&0x40) P[1]=C;
if(J&0x20) P[2]=C;if(J&0x10) P[3]=C;
if(J&0x08) P[4]=C;if(J&0x04) P[5]=C;
if(J&0x02) P[6]=C;if(J&0x01) P[7]=C;
if(H>8)
{
J=PT[16];
if(J&0x80) P[8]=C; if(J&0x40) P[9]=C;
if(J&0x20) P[10]=C;if(J&0x10) P[11]=C;
if(J&0x08) P[12]=C;if(J&0x04) P[13]=C;
if(J&0x02) P[14]=C;if(J&0x01) P[15]=C;
}
}
}
/* Update overlapping flag */
OrThem>>=1;
}
}
/** RefreshLineF() *******************************************/
/** Dummy refresh function called for non-existing screens. **/
/*************************************************************/
static void RefreshLineF(register byte Y)
{
register pixel *P;
//if(Verbose>1)
// printf
// (
// "ScrMODE %d: ChrTab=%X ChrGen=%X ColTab=%X SprTab=%X SprGen=%X\n",
// ScrMode,ChrTab-VRAM,ChrGen-VRAM,ColTab-VRAM,SprTab-VRAM,SprGen-VRAM
// );
P=RefreshBorder(Y,XPal[BGColor]);
if(P) ClearLine(P,XPal[BGColor]);
}
/** RefreshLine0() *******************************************/
/** Refresh line Y (0..191/211) of SCREEN0. **/
/*************************************************************/
static void RefreshLine0(register byte Y)
{
register pixel *P,FC,BC;
register byte X,*T,*G;
BC=XPal[BGColor];
P=RefreshBorder(Y,BC);
if(!P) return;
if(!ScreenON) ClearLine(P,BC);
else
{
P[0]=P[1]=P[2]=P[3]=P[4]=P[5]=P[6]=P[7]=P[8]=BC;
G=(UseFont&&FontBuf? FontBuf:ChrGen)+((Y+VScroll)&0x07);
T=ChrTab+40*(Y>>3);
FC=XPal[FGColor];
P+=9;
for(X=0;X<40;X++,T++,P+=6)
{
Y=G[(int)*T<<3];
P[0]=Y&0x80? FC:BC;P[1]=Y&0x40? FC:BC;
P[2]=Y&0x20? FC:BC;P[3]=Y&0x10? FC:BC;
P[4]=Y&0x08? FC:BC;P[5]=Y&0x04? FC:BC;
}
P[0]=P[1]=P[2]=P[3]=P[4]=P[5]=P[6]=BC;
}
}
/** RefreshLine1() *******************************************/
/** Refresh line Y (0..191/211) of SCREEN1, including **/
/** sprites in this line. **/
/*************************************************************/
static void RefreshLine1(register byte Y)
{
register pixel *P,FC,BC;
register byte K,X,*T,*G;
P=RefreshBorder(Y,XPal[BGColor]);
if(!P) return;
if(!ScreenON) ClearLine(P,XPal[BGColor]);
else
{
Y+=VScroll;
G=(UseFont&&FontBuf? FontBuf:ChrGen)+(Y&0x07);
T=ChrTab+((int)(Y&0xF8)<<2);
for(X=0;X<32;X++,T++,P+=8)
{
K=ColTab[*T>>3];
FC=XPal[K>>4];
BC=XPal[K&0x0F];
K=G[(int)*T<<3];
P[0]=K&0x80? FC:BC;P[1]=K&0x40? FC:BC;
P[2]=K&0x20? FC:BC;P[3]=K&0x10? FC:BC;
P[4]=K&0x08? FC:BC;P[5]=K&0x04? FC:BC;
P[6]=K&0x02? FC:BC;P[7]=K&0x01? FC:BC;
}
if(!SpritesOFF) Sprites(Y,P-256);
}
}
/** RefreshLine2() *******************************************/
/** Refresh line Y (0..191/211) of SCREEN2, including **/
/** sprites in this line. **/
/*************************************************************/
static void RefreshLine2(register byte Y)
{
register pixel *P,FC,BC;
register byte K,X,*T;
register int I,J;
P=RefreshBorder(Y,XPal[BGColor]);
if(!P) return;
if(!ScreenON) ClearLine(P,XPal[BGColor]);
else
{
Y+=VScroll;
T=ChrTab+((int)(Y&0xF8)<<2);
I=((int)(Y&0xC0)<<5)+(Y&0x07);
for(X=0;X<32;X++,T++,P+=8)
{
J=(int)*T<<3;
K=ColTab[(I+J)&ColTabM];
FC=XPal[K>>4];
BC=XPal[K&0x0F];
K=ChrGen[(I+J)&ChrGenM];
P[0]=K&0x80? FC:BC;P[1]=K&0x40? FC:BC;
P[2]=K&0x20? FC:BC;P[3]=K&0x10? FC:BC;
P[4]=K&0x08? FC:BC;P[5]=K&0x04? FC:BC;
P[6]=K&0x02? FC:BC;P[7]=K&0x01? FC:BC;
}
if(!SpritesOFF) Sprites(Y,P-256);
}
}
/** RefreshLine3() *******************************************/
/** Refresh line Y (0..191/211) of SCREEN3, including **/
/** sprites in this line. **/
/*************************************************************/
static void RefreshLine3(register byte Y)
{
register pixel *P;
register byte X,K,*T,*G;
P=RefreshBorder(Y,XPal[BGColor]);
if(!P) return;
if(!ScreenON) ClearLine(P,XPal[BGColor]);
else
{
Y+=VScroll;
T=ChrTab+((int)(Y&0xF8)<<2);
G=ChrGen+((Y&0x1C)>>2);
for(X=0;X<32;X++,T++,P+=8)
{
K=G[(int)*T<<3];
P[0]=P[1]=P[2]=P[3]=XPal[K>>4];
P[4]=P[5]=P[6]=P[7]=XPal[K&0x0F];
}
if(!SpritesOFF) Sprites(Y,P-256);
}
}
/** RefreshLine4() *******************************************/
/** Refresh line Y (0..191/211) of SCREEN4, including **/
/** sprites in this line. **/
/*************************************************************/
static void RefreshLine4(register byte Y)
{
register pixel *P,FC,BC;
register byte K,X,C,*T,*R;
register int I,J;
byte ZBuf[304];
P=RefreshBorder(Y,XPal[BGColor]);
if(!P) return;
if(!ScreenON) ClearLine(P,XPal[BGColor]);
else
{
ColorSprites(Y,ZBuf);
R=ZBuf+32;
Y+=VScroll;
T=ChrTab+((int)(Y&0xF8)<<2);
I=((int)(Y&0xC0)<<5)+(Y&0x07);
for(X=0;X<32;X++,R+=8,P+=8,T++)
{
J=(int)*T<<3;
K=ColTab[(I+J)&ColTabM];
FC=XPal[K>>4];
BC=XPal[K&0x0F];
K=ChrGen[(I+J)&ChrGenM];
C=R[0];P[0]=C? XPal[C]:(K&0x80)? FC:BC;
C=R[1];P[1]=C? XPal[C]:(K&0x40)? FC:BC;
C=R[2];P[2]=C? XPal[C]:(K&0x20)? FC:BC;
C=R[3];P[3]=C? XPal[C]:(K&0x10)? FC:BC;
C=R[4];P[4]=C? XPal[C]:(K&0x08)? FC:BC;
C=R[5];P[5]=C? XPal[C]:(K&0x04)? FC:BC;
C=R[6];P[6]=C? XPal[C]:(K&0x02)? FC:BC;
C=R[7];P[7]=C? XPal[C]:(K&0x01)? FC:BC;
}
}
}
/** RefreshLine5() *******************************************/
/** Refresh line Y (0..191/211) of SCREEN5, including **/
/** sprites in this line. **/
/*************************************************************/
static void RefreshLine5(register byte Y)
{
register pixel *P;
register byte I,X,*T,*R;
byte ZBuf[304];
P=RefreshBorder(Y,XPal[BGColor]);
if(!P) return;
if(!ScreenON) ClearLine(P,XPal[BGColor]);
else
{
ColorSprites(Y,ZBuf);
R=ZBuf+32;
T=ChrTab+(((int)(Y+VScroll)<<7)&ChrTabM&0x7FFF);
for(X=0;X<16;X++,R+=16,P+=16,T+=8)
{
I=R[0];P[0]=XPal[I? I:T[0]>>4];
I=R[1];P[1]=XPal[I? I:T[0]&0x0F];
I=R[2];P[2]=XPal[I? I:T[1]>>4];
I=R[3];P[3]=XPal[I? I:T[1]&0x0F];
I=R[4];P[4]=XPal[I? I:T[2]>>4];
I=R[5];P[5]=XPal[I? I:T[2]&0x0F];
I=R[6];P[6]=XPal[I? I:T[3]>>4];
I=R[7];P[7]=XPal[I? I:T[3]&0x0F];
I=R[8];P[8]=XPal[I? I:T[4]>>4];
I=R[9];P[9]=XPal[I? I:T[4]&0x0F];
I=R[10];P[10]=XPal[I? I:T[5]>>4];
I=R[11];P[11]=XPal[I? I:T[5]&0x0F];
I=R[12];P[12]=XPal[I? I:T[6]>>4];
I=R[13];P[13]=XPal[I? I:T[6]&0x0F];
I=R[14];P[14]=XPal[I? I:T[7]>>4];
I=R[15];P[15]=XPal[I? I:T[7]&0x0F];
}
}
}
/** RefreshLine8() *******************************************/
/** Refresh line Y (0..191/211) of SCREEN8, including **/
/** sprites in this line. **/
/*************************************************************/
static void RefreshLine8(register byte Y)
{
static byte SprToScr[16] =
{
0x00,0x02,0x10,0x12,0x80,0x82,0x90,0x92,
0x49,0x4B,0x59,0x5B,0xC9,0xCB,0xD9,0xDB
};
register pixel *P;
register byte C,X,*T,*R;
byte ZBuf[304];
P=RefreshBorder(Y,BPal[VDP[7]]);
if(!P) return;
if(!ScreenON) ClearLine(P,BPal[VDP[7]]);
else
{
ColorSprites(Y,ZBuf);
R=ZBuf+32;
T=ChrTab+(((int)(Y+VScroll)<<8)&ChrTabM&0xFFFF);
for(X=0;X<32;X++,T+=8,R+=8,P+=8)
{
C=R[0];P[0]=BPal[C? SprToScr[C]:T[0]];
C=R[1];P[1]=BPal[C? SprToScr[C]:T[1]];
C=R[2];P[2]=BPal[C? SprToScr[C]:T[2]];
C=R[3];P[3]=BPal[C? SprToScr[C]:T[3]];
C=R[4];P[4]=BPal[C? SprToScr[C]:T[4]];
C=R[5];P[5]=BPal[C? SprToScr[C]:T[5]];
C=R[6];P[6]=BPal[C? SprToScr[C]:T[6]];
C=R[7];P[7]=BPal[C? SprToScr[C]:T[7]];
}
}
}
/** RefreshLine10() ******************************************/
/** Refresh line Y (0..191/211) of SCREEN10/11, including **/
/** sprites in this line. **/
/*************************************************************/
static void RefreshLine10(register byte Y)
{
register pixel *P;
register byte C,X,*T,*R;
register int J,K;
byte ZBuf[304];
P=RefreshBorder(Y,BPal[VDP[7]]);
if(!P) return;
if(!ScreenON) ClearLine(P,BPal[VDP[7]]);
else
{
ColorSprites(Y,ZBuf);
R=ZBuf+32;
T=ChrTab+(((int)(Y+VScroll)<<8)&ChrTabM&0xFFFF);
/* Draw first 4 pixels */
C=R[0];P[0]=C? XPal[C]:BPal[VDP[7]];
C=R[1];P[1]=C? XPal[C]:BPal[VDP[7]];
C=R[2];P[2]=C? XPal[C]:BPal[VDP[7]];
C=R[3];P[3]=C? XPal[C]:BPal[VDP[7]];
R+=4;P+=4;
for(X=0;X<63;X++,T+=4,R+=4,P+=4)
{
K=(T[0]&0x07)|((T[1]&0x07)<<3);
if(K&0x20) K-=64;
J=(T[2]&0x07)|((T[3]&0x07)<<3);
if(J&0x20) J-=64;
C=R[0];Y=T[0]>>3;P[0]=C? XPal[C]:Y&1? XPal[Y>>1]:YJKColor(Y,J,K);
C=R[1];Y=T[1]>>3;P[1]=C? XPal[C]:Y&1? XPal[Y>>1]:YJKColor(Y,J,K);
C=R[2];Y=T[2]>>3;P[2]=C? XPal[C]:Y&1? XPal[Y>>1]:YJKColor(Y,J,K);
C=R[3];Y=T[3]>>3;P[3]=C? XPal[C]:Y&1? XPal[Y>>1]:YJKColor(Y,J,K);
}
}
}
/** RefreshLine12() ******************************************/
/** Refresh line Y (0..191/211) of SCREEN12, including **/
/** sprites in this line. **/
/*************************************************************/
static void RefreshLine12(register byte Y)
{
register pixel *P;
register byte C,X,*T,*R;
register int J,K;
byte ZBuf[304];
P=RefreshBorder(Y,BPal[VDP[7]]);
if(!P) return;
if(!ScreenON) ClearLine(P,BPal[VDP[7]]);
else
{
ColorSprites(Y,ZBuf);
R=ZBuf+32;
T=ChrTab+(((int)(Y+VScroll)<<8)&ChrTabM&0xFFFF);
if(HScroll512&&(HScroll>255)) T=(byte *)((int)T^0x10000);
T+=HScroll&0xFC;
/* Draw first 4 pixels */
C=R[0];P[0]=C? XPal[C]:BPal[VDP[7]];
C=R[1];P[1]=C? XPal[C]:BPal[VDP[7]];
C=R[2];P[2]=C? XPal[C]:BPal[VDP[7]];
C=R[3];P[3]=C? XPal[C]:BPal[VDP[7]];
R+=4;P+=4;
for(X=1;X<64;X++,T+=4,R+=4,P+=4)
{
K=(T[0]&0x07)|((T[1]&0x07)<<3);
if(K&0x20) K-=64;
J=(T[2]&0x07)|((T[3]&0x07)<<3);
if(J&0x20) J-=64;
C=R[0];P[0]=C? XPal[C]:YJKColor(T[0]>>3,J,K);
C=R[1];P[1]=C? XPal[C]:YJKColor(T[1]>>3,J,K);
C=R[2];P[2]=C? XPal[C]:YJKColor(T[2]>>3,J,K);
C=R[3];P[3]=C? XPal[C]:YJKColor(T[3]>>3,J,K);
}
}
}
//#ifdef NARROW
/** RefreshLine6() *******************************************/
/** Refresh line Y (0..191/211) of SCREEN6, including **/
/** sprites in this line. **/
/*************************************************************/
static void RefreshLine6(register byte Y)
{
register pixel *P;
register byte X,*T,*R,C;
byte ZBuf[304];
P=RefreshBorder(Y,XPal[BGColor&0x03]);
if(!P) return;
if(!ScreenON) ClearLine(P,XPal[BGColor&0x03]);
else
{
ColorSprites(Y,ZBuf);
R=ZBuf+32;
T=ChrTab+(((int)(Y+VScroll)<<7)&ChrTabM&0x7FFF);
for(X=0;X<32;X++)
{
C=R[0];P[0]=XPal[C? C:T[0]>>6];
C=R[1];P[1]=XPal[C? C:(T[0]>>2)&0x03];
C=R[2];P[2]=XPal[C? C:T[1]>>6];
C=R[3];P[3]=XPal[C? C:(T[1]>>2)&0x03];
C=R[4];P[4]=XPal[C? C:T[2]>>6];
C=R[5];P[5]=XPal[C? C:(T[2]>>2)&0x03];
C=R[6];P[6]=XPal[C? C:T[3]>>6];
C=R[7];P[7]=XPal[C? C:(T[3]>>2)&0x03];
R+=8;P+=8;T+=4;
}
}
}
/** RefreshLine7() *******************************************/
/** Refresh line Y (0..191/211) of SCREEN7, including **/
/** sprites in this line. **/
/*************************************************************/
static void RefreshLine7(register byte Y)
{
register pixel *P;
register byte C,X,*T,*R;
byte ZBuf[304];
P=RefreshBorder(Y,XPal[BGColor]);
if(!P) return;
if(!ScreenON) ClearLine(P,XPal[BGColor]);
else
{
ColorSprites(Y,ZBuf);
R=ZBuf+32;
T=ChrTab+(((int)(Y+VScroll)<<8)&ChrTabM&0xFFFF);
for(X=0;X<32;X++)
{
C=R[0];P[0]=XPal[C? C:T[0]>>4];
C=R[1];P[1]=XPal[C? C:T[1]>>4];
C=R[2];P[2]=XPal[C? C:T[2]>>4];
C=R[3];P[3]=XPal[C? C:T[3]>>4];
C=R[4];P[4]=XPal[C? C:T[4]>>4];
C=R[5];P[5]=XPal[C? C:T[5]>>4];
C=R[6];P[6]=XPal[C? C:T[6]>>4];
C=R[7];P[7]=XPal[C? C:T[7]>>4];
R+=8;P+=8;T+=8;
}
}
}
/** RefreshLineTx80() ****************************************/
/** Refresh line Y (0..191/211) of TEXT80. **/
/*************************************************************/
static void RefreshLineTx80(register byte Y)
{
register pixel *P,FC,BC;
register byte X,M,*T,*C,*G;
BC=XPal[BGColor];
P=RefreshBorder(Y,BC);
if(!P) return;
if(!ScreenON) ClearLine(P,BC);
else
{
P[0]=P[1]=P[2]=P[3]=P[4]=P[5]=P[6]=P[7]=P[8]=BC;
G=(UseFont&&FontBuf? FontBuf:ChrGen)+((Y+VScroll)&0x07);
T=ChrTab+((80*(Y>>3))&ChrTabM);
C=ColTab+((10*(Y>>3))&ColTabM);
P+=9;
for(X=0,M=0x00;X<80;X++,T++,P+=3)
{
if(!(X&0x07)) M=*C++;
if(M&0x80) { FC=XPal[XFGColor];BC=XPal[XBGColor]; }
else { FC=XPal[FGColor];BC=XPal[BGColor]; }
M<<=1;
Y=*(G+((int)*T<<3));
P[0]=Y&0xC0? FC:BC;
P[1]=Y&0x30? FC:BC;
P[2]=Y&0x0C? FC:BC;
}
P[0]=P[1]=P[2]=P[3]=P[4]=P[5]=P[6]=XPal[BGColor];
}
}
//#endif /* NARROW */
/** RdZ80() **************************************************/
/** Z80 emulation calls this function to read a byte from **/
/** address A of Z80 address space. Now moved to Z80.c and **/
/** made inlined to speed things up. **/
/*************************************************************/
byte RdZ80(word A)
{
if(A!=0xFFFF) return(RAM[A>>13][A&0x1FFF]);
else return(PSL[3]==3? ~SSLReg:RAM[7][0x1FFF]);
}
/** WrZ80() **************************************************/
/** Z80 emulation calls this function to write byte V to **/
/** address A of Z80 address space. **/
/*************************************************************/
void WrZ80(word A,byte V)
{
if(A!=0xFFFF)
{
if(EnWrite[A>>14]) RAM[A>>13][A&0x1FFF]=V;
else if((A>0x3FFF)&&(A<0xC000)) MapROM(A,V);
}
else
{
if(PSL[3]==3) SSlot(V);
else if(EnWrite[3]) RAM[7][A&0x1FFF]=V;
}
}
/** InZ80() **************************************************/
/** Z80 emulation calls this function to read a byte from **/
/** a given I/O port. **/
/*************************************************************/
byte InZ80(word Port)
{
/* MSX only uses 256 IO ports */
Port&=0xFF;
/* Return an appropriate port value */
switch(Port)
{
case 0x90: return(0xFD); /* Printer READY signal */
case 0xB5: return(RTCIn(RTCReg)); /* RTC registers */
case 0xA8: /* Primary slot state */
case 0xA9: /* Keyboard port */
case 0xAA: /* General IO register */
case 0xAB: /* PPI control register */
PPI.Rin[1]=KeyMap[PPI.Rout[2]&0x0F];
return(Read8255(&PPI,Port-0xA8));
case 0xFC: /* Mapper page at 0000h */
case 0xFD: /* Mapper page at 4000h */
case 0xFE: /* Mapper page at 8000h */
case 0xFF: /* Mapper page at C000h */
return(RAMMapper[Port-0xFC]|~RAMMask);
case 0xD9: /* Kanji support */
Port=Kanji? Kanji[KanLetter+KanCount]:NORAM;
KanCount=(KanCount+1)&0x1F;
return(Port);
case 0x80: /* SIO data */
case 0x81:
case 0x82:
case 0x83:
case 0x84:
case 0x85:
case 0x86:
case 0x87:
return(NORAM);
/*return(Rd8251(&SIO,Port&0x07));*/
case 0x98: /* VRAM read port */
/* Read from VRAM data buffer */
Port=VDPData;
/* Reset VAddr latch sequencer */
VKey=1;
/* Fill data buffer with a new value */
VDPData=VPAGE[VAddr];
/* Increment VRAM address */
VAddr=(VAddr+1)&0x3FFF;
/* If rolled over, modify VRAM page# */
if(!VAddr&&(ScrMode>3))
{
VDP[14]=(VDP[14]+1)&(VRAMPages-1);
VPAGE=VRAM+((int)VDP[14]<<14);
}
return(Port);
case 0x99: /* VDP status registers */
/* Read an appropriate status register */
Port=VDPStatus[VDP[15]];
/* Reset VAddr latch sequencer */
VKey=1;
/* Update status register's contents */
switch(VDP[15])
{
case 0: VDPStatus[0]&=0x5F;SetIRQ(~INT_IE0);break;
case 1: VDPStatus[1]&=0xFE;SetIRQ(~INT_IE1);break;
case 7: VDPStatus[7]=VDP[44]=VDPRead();break;
}
/* Return the status register value */
return(Port);
case 0xA2: /* PSG input port */
/* PSG[14] returns joystick/mouse data */
if(PSG.Latch==14)
{
int DX,DY,L;
/* Number of a joystick port */
Port=PSG.R[15]&0x40? 1:0;
L=Port? JoyTypeB:JoyTypeA;
/* If no joystick, return dummy value */
if(!L) return(0x7F);
/* @@@ For debugging purposes */
/*printf("Reading from PSG[14]: MCount[%d]=%d PSG[15]=%02Xh Value=",Port,MCount[Port],PSG.R[15]);*/
/* Poll mouse position, if needed */
if((L==2)||(MCount[Port]==1))
{
/* Read new mouse coordinates */
L=Mouse(Port);
Buttons[Port]=(~L>>12)&0x30;
DY=(L>>8)&0xFF;
DX=L&0xFF;
/* Compute offsets and store coordinates */
L=OldMouseX[Port]-DX;OldMouseX[Port]=DX;DX=L;
L=OldMouseY[Port]-DY;OldMouseY[Port]=DY;DY=L;
/* Adjust offsets */
MouseDX[Port]=(DX>127? 127:(DX<-127? -127:DX))&0xFF;
MouseDY[Port]=(DY>127? 127:(DY<-127? -127:DY))&0xFF;
}
/* Determine return value */
switch(MCount[Port])
{
case 0: /* Normal joystick */
if(PSG.R[15]&(Port? 0x20:0x10)) Port=0x3F;
else
if((Port? JoyTypeB:JoyTypeA)<2) Port=~Joystick(Port)&0x3F;
else Port=Buttons[Port]
|(MouseDX[Port]? (MouseDX[Port]<128? 0x08:0x04):0x0C)
|(MouseDY[Port]? (MouseDY[Port]<128? 0x02:0x01):0x03);
break;
case 1: Port=(MouseDX[Port]>>4)|Buttons[Port];break;
case 2: Port=(MouseDX[Port]&0x0F)|Buttons[Port];break;
case 3: Port=(MouseDY[Port]>>4)|Buttons[Port];break;
case 4: Port=(MouseDY[Port]&0x0F)|Buttons[Port];break;
}
/* @@@ For debugging purposes */
/*printf("%02Xh\n",Port|0x40);*/
/* 6th bit is always 1 */
return(Port|0x40);
}
/* PSG[15] resets mouse counters */
if(PSG.Latch==15)
{
/* @@@ For debugging purposes */
/*printf("Reading from PSG[15]\n");*/
/*MCount[0]=MCount[1]=0;*/
return(PSG.R[15]&0xF0);
}
/* Return PSG[0-13] as they are */
return(RdData8910(&PSG));
}
/* Return NORAM for non-existing ports */
return(NORAM);
}
/** OutZ80() *************************************************/
/** Z80 emulation calls this function to write byte V to a **/
/** given I/O port. **/
/*************************************************************/
void OutZ80(word Port,byte Value)
{
register byte I,J,K;
Port&=0xFF;
switch(Port)
{
case 0x7C: WrCtrl2413(&OPLL,Value);return; /* OPLL Register# */
case 0x7D: WrData2413(&OPLL,Value);return; /* OPLL Data */
case 0x91: Printer(Value);return; /* Printer Data */
case 0xA0: WrCtrl8910(&PSG,Value);return; /* PSG Register# */
case 0xB4: RTCReg=Value&0x0F;return; /* RTC Register# */
case 0xD8: /* Upper bits of Kanji ROM address */
KanLetter=(KanLetter&0x1F800)|((int)(Value&0x3F)<<5);
KanCount=0;
return;
case 0xD9: /* Lower bits of Kanji ROM address */
KanLetter=(KanLetter&0x007E0)|((int)(Value&0x3F)<<11);
KanCount=0;
return;
case 0x80: /* SIO data */
case 0x81:
case 0x82:
case 0x83:
case 0x84:
case 0x85:
case 0x86:
case 0x87:
return;
/*Wr8251(&SIO,Port&0x07,Value);
return;*/
case 0x98: /* VDP Data */
VKey=1;
if(WKey)
{
/* VDP set for writing */
VDPData=VPAGE[VAddr]=Value;
VAddr=(VAddr+1)&0x3FFF;
}
else
{
/* VDP set for reading */
VDPData=VPAGE[VAddr];
VAddr=(VAddr+1)&0x3FFF;
VPAGE[VAddr]=Value;
}
/* If VAddr rolled over, modify VRAM page# */
if(!VAddr&&(ScrMode>3))
{
VDP[14]=(VDP[14]+1)&(VRAMPages-1);
VPAGE=VRAM+((int)VDP[14]<<14);
}
return;
case 0x99: /* VDP Address Latch */
if(VKey) { ALatch=Value;VKey=0; }
else
{
VKey=1;
switch(Value&0xC0)
{
case 0x80:
/* Writing into VDP registers */
VDPOut(Value&0x3F,ALatch);
break;
case 0x00:
case 0x40:
/* Set the VRAM access address */
VAddr=(((word)Value<<8)+ALatch)&0x3FFF;
/* WKey=1 when VDP set for writing into VRAM */
WKey=Value&0x40;
/* When set for reading, perform first read */
if(!WKey)
{
VDPData=VPAGE[VAddr];
VAddr=(VAddr+1)&0x3FFF;
if(!VAddr&&(ScrMode>3))
{
VDP[14]=(VDP[14]+1)&(VRAMPages-1);
VPAGE=VRAM+((int)VDP[14]<<14);
}
}
break;
}
}
return;
case 0x9A: /* VDP Palette Latch */
if(PKey) { PLatch=Value;PKey=0; }
else
{
byte R,G,B;
/* New palette entry written */
PKey=1;
J=VDP[16];
/* Compute new color components */
R=(PLatch&0x70)*255/112;
G=(Value&0x07)*255/7;
B=(PLatch&0x07)*255/7;
/* Set new color for palette entry J */
Palette[J]=RGB2INT(R,G,B);
SetColor(J,R,G,B);
/* Next palette entry */
VDP[16]=(J+1)&0x0F;
}
return;
case 0x9B: /* VDP Register Access */
J=VDP[17]&0x3F;
if(J!=17) VDPOut(J,Value);
if(!(VDP[17]&0x80)) VDP[17]=(J+1)&0x3F;
return;
case 0xA1: /* PSG Data */
/* PSG[15] is responsible for joystick/mouse */
if(PSG.Latch==15)
{
/* @@@ For debugging purposes */
/*printf("Writing PSG[15] <- %02Xh\n",Value);*/
/* For mouse, update nibble counter */
/* For joystick, set nibble counter to 0 */
if((Value&0x0C)==0x0C) MCount[1]=0;
else if((JoyTypeB>2)&&((Value^PSG.R[15])&0x20))
MCount[1]+=MCount[1]==4? -3:1;
/* For mouse, update nibble counter */
/* For joystick, set nibble counter to 0 */
if((Value&0x03)==0x03) MCount[0]=0;
else if((JoyTypeA>2)&&((Value^PSG.R[15])&0x10))
MCount[0]+=MCount[0]==4? -3:1;
}
/* Put value into a register */
WrData8910(&PSG,Value);
return;
case 0xB5: /* RTC Data */
if(RTCReg<13)
{
/* J = register bank# now */
J=RTCMode&0x03;
/* Store the value */
RTC[J][RTCReg]=Value;
/* If CMOS modified, we need to save it */
if(J>1) SaveCMOS=1;
return;
}
/* RTC[13] is a register bank# */
if(RTCReg==13) RTCMode=Value;
return;
case 0xA8: /* Primary slot state */
case 0xA9: /* Keyboard port */
case 0xAA: /* General IO register */
case 0xAB: /* PPI control register */
/* Write to PPI */
Write8255(&PPI,Port-0xA8,Value);
/* If general I/O register has changed... */
if(PPI.Rout[2]!=IOReg) { PPIOut(PPI.Rout[2],IOReg);IOReg=PPI.Rout[2]; }
/* If primary slot state has changed... */
if(PPI.Rout[0]!=PSLReg)
for(J=0,PSLReg=Value=PPI.Rout[0];J<4;J++,Value>>=2)
{
PSL[J]=Value&3;I=J<<1;
K=PSL[J]==3? SSL[J]:0;
EnWrite[J]=(K==2)&&(MemMap[3][2][I]!=EmptyRAM);
RAM[I]=MemMap[PSL[J]][K][I];
RAM[I+1]=MemMap[PSL[J]][K][I+1];
}
/* Done */
return;
case 0xFC: /* Mapper page at 0000h */
case 0xFD: /* Mapper page at 4000h */
case 0xFE: /* Mapper page at 8000h */
case 0xFF: /* Mapper page at C000h */
J=Port-0xFC;
Value&=RAMMask;
if(RAMMapper[J]!=Value)
{
if(Verbose&0x08) {
//printf("RAM-MAPPER: block %d at %Xh\n",Value,J*0x4000);
emu_printf("RAM-MAPPER: block");
emu_printi(Value);
emu_printi(J*0x4000);
}
I=J<<1;
RAMMapper[J] = Value;
MemMap[3][2][I] = RAMData+((int)Value<<14);
MemMap[3][2][I+1] = MemMap[3][2][I]+0x2000;
if((PSL[J]==3)&&(SSL[J]==2))
{
EnWrite[J] = 1;
RAM[I] = MemMap[3][2][I];
RAM[I+1] = MemMap[3][2][I+1];
}
}
return;
}
}
/** MapROM() *************************************************/
/** Switch ROM Mapper pages. This function is supposed to **/
/** be called when ROM page registers are written to. **/
/*************************************************************/
void MapROM(register word A,register byte V)
{
byte I,J,K,*P;
/* @@@ For debugging purposes
printf("(%04Xh) = %02Xh at PC=%04Xh\n",A,V,CPU.PC.W);
*/
/* J contains 16kB page number 0-3 */
J=A>>14;
/* I contains slot number 0/1 */
if(PSL[J]==1) I=0;
else if(PSL[J]==2) I=1;
else return;
/* K contains MegaROM type */
K=I? ROMTypeB:ROMTypeA;
/* SCC: enable/disable for no cart */
if(!ROMData[I]&&(A==0x9000)) SCCOn[I]=(V==0x3F)? 1:0;
/* SCC: types 0, 2, or no cart */
if(((A&0xFF00)==0x9800)&&SCCOn[I])
{
/* Compute SCC register number */
J=A&0x00FF;
/* When no MegaROM present, we allow the program */
/* to write into SCC wave buffer using EmptyRAM */
/* as a scratch pad. */
if(!ROMData[I]&&(J<0x80)) EmptyRAM[0x1800+J]=V;
/* Output data to SCC chip */
WriteSCC(&SCChip,J,V);
return;
}
/* SCC+: types 0, 2, or no cart */
if(((A&0xFF00)==0xB800)&&SCCOn[I])
{
/* Compute SCC register number */
J=A&0x00FF;
/* When no MegaROM present, we allow the program */
/* to write into SCC wave buffer using EmptyRAM */
/* as a scratch pad. */
if(!ROMData[I]&&(J<0xA0)) EmptyRAM[0x1800+J]=V;
/* Output data to SCC chip */
WriteSCCP(&SCChip,J,V);
return;
}
/* If no cartridge or no mapper, exit */
if(!ROMData[I]||!ROMMask[I]) return;
switch(K)
{
case 0: /*** Generic 8kB cartridges (Konami, etc.) ***/
if((A<0x4000)||(A>0xBFFF)) return;
J=(A-0x4000)>>13;
/* Turn SCC on/off on writes to 8000h-9FFFh */
if(J==2) SCCOn[I]=(V==0x3F)? 1:0;
/* Switch ROM pages */
V&=ROMMask[I];
if(V!=ROMMapper[I][J])
{
RAM[J+2]=MemMap[I+1][0][J+2]=ROMData[I]+((int)V<<13);
ROMMapper[I][J]=V;
}
break;
case 1: /*** Generic 16kB cartridges (MSXDOS2, HoleInOneSpecial) ***/
if((A<0x4000)||(A>0xBFFF)) return;
J=(A&0x8000)>>14;
V=(V<<1)&ROMMask[I];
if(V!=ROMMapper[I][J])
{
RAM[J+2]=MemMap[I+1][0][J+2]=ROMData[I]+((int)V<<13);
RAM[J+3]=MemMap[I+1][0][J+3]=RAM[2]+0x2000;
ROMMapper[I][J]=V;
}
break;
case 2: /*** KONAMI5 8kB cartridges ***/
if((A<0x5000)||(A>0xB000)||((A&0x1FFF)!=0x1000)) return;
J=(A-0x5000)>>13;
/* Turn SCC on/off on writes to 9000h */
if(J==2) SCCOn[I]=(V==0x3F)? 1:0;
/* Switch ROM pages */
V&=ROMMask[I];
if(V!=ROMMapper[I][J])
{
RAM[J+2]=MemMap[I+1][0][J+2]=ROMData[I]+((int)V<<13);
ROMMapper[I][J]=V;
}
break;
case 3: /*** KONAMI4 8kB cartridges ***/
/* Page at 4000h is fixed */
if((A<0x6000)||(A>0xA000)||(A&0x1FFF)) return;
J=(A-0x4000)>>13;
V&=ROMMask[I];
if(V!=ROMMapper[I][J])
{
RAM[J+2]=MemMap[I+1][0][J+2]=ROMData[I]+((int)V<<13);
ROMMapper[I][J]=V;
}
break;
case 4: /*** ASCII 8kB cartridges ***/
if((A<0x6000)||(A>0x7FFF)) return;
J=(A&0x1800)>>11;
V&=ROMMask[I];
if(V!=ROMMapper[I][J])
{
P=ROMData[I]+((int)V<<13);
MemMap[I+1][0][J+2]=P;
ROMMapper[I][J]=V;
/* Only update memory when cartridge's slot selected */
if(PSL[(J>>1)+1]==I+1) RAM[J+2]=P;
}
break;
case 5: /*** ASCII 16kB cartridges ***/
if((A<0x6000)||(A>0x7FFF)) return;
J=(A&0x1000)>>11;
V=(V<<1)&ROMMask[I];
if(V!=ROMMapper[I][J])
{
P=ROMData[I]+((int)V<<13);
MemMap[I+1][0][J+2]=P;
MemMap[I+1][0][J+3]=P+0x2000;
ROMMapper[I][J]=V;
/* Only update memory when cartridge's slot selected */
if(PSL[(J>>1)+1]==I+1)
{
RAM[J+2]=P;
RAM[J+3]=P+0x2000;
}
}
break;
case 6: /*** GameMaster2+SRAM cartridge ***/
/* Switch ROM and SRAM pages, page at 4000h is fixed */
if((A>=0x6000)&&(A<=0xA000)&&!(A&0x1FFF))
{
/* If changing SRAM page... */
if(V&0x10)
{
/* Select SRAM page */
RAM[5]=MemMap[I+1][0][5]=(SRAM? SRAM:EmptyRAM)+(V&0x20? 0x2000:0);
/* SRAM is now on */
ROMMapper[I][3]=0xFF;
}
else
{
/* Figure out which ROM page gets switched */
J=(A-0x4000)>>13;
/* Compute new ROM page number */
V&=ROMMask[I];
/* If ROM page number has changed... */
if(V!=ROMMapper[I][J])
{
RAM[J+2]=MemMap[I+1][0][J+2]=ROMData[I]+((int)V<<13);
ROMMapper[I][J]=V;
}
}
/* Done with page switch */
break;
}
/* Write to SRAM */
if((A>=0xB000)&&(A<0xC000)&&(ROMMapper[I][3]==0xFF))
{
RAM[5][(A&0x0FFF)|0x1000]=RAM[5][A&0x0FFF]=V;
SaveSRAM=1;
break;
}
/* Done */
return;
default: /*** No MegaROM mapper by default ***/
return;
}
if(Verbose&0x08)
{
/* K=1 for 16kB pages */
K=(K==1)||(K==5);
//printf
//(
// "ROM-MAPPER %c: %dkB block %d at %04Xh\n",
// I+'A',8*(K+1),K? (V>>1):V,J*0x2000+0x4000
//);
}
}
/** SSlot() **************************************************/
/** Switch secondary memory slots. This function is called **/
/** when value in (FFFFh) changes. **/
/*************************************************************/
void SSlot(register byte V)
{
register byte I,J;
if(SSLReg!=V)
{
SSLReg=V;
for(J=0;J<4;J++,V>>=2)
{
SSL[J]=V&3;
if(PSL[J]==3)
{
I=J<<1;
EnWrite[J]=(SSL[J]==2)&&(MemMap[3][2][I]!=EmptyRAM);
RAM[I]=MemMap[3][SSL[J]][I];
RAM[I+1]=MemMap[3][SSL[J]][I+1];
}
}
}
}
/** LoadROM() ************************************************/
/** Load a file, allocating memory as needed. Returns addr. **/
/** of the alocated space or 0 if failed. **/
/*************************************************************/
byte *LoadROM(const char *Name,int Size,byte *Buf)
{
byte *P;
/* Can't give address without size! */
if(Buf&&!Size) return(0);
Size = emu_FileSize(Name);
emu_printi(Size);
if (Size<=0) return (0);
P=Buf? Buf:emu_Malloc(Size);
emu_LoadFile(Name, P, Size);
//Add a new chunk to free
if(!Buf) Chunks[CCount++]=P;
return(P);
}
/** LoadCARTROM() ********************************************/
/** Load a file. Returns addr where loaded. **/
/*************************************************************/
byte *LoadCARTROM(const char *Name,int Size,byte *Buf)
{
byte *P;
Size = emu_FileSize(Name);
emu_printi(Size);
if (Size<=0) return (0);
if (Buf)
{
P=Buf;
emu_printf("Loading to ram");
emu_LoadFile(Name, P, Size);
//byte * FP = (byte *)flash_load(Name);
//flash_verify(P,Size);
return P;
}
else
{
emu_printf("Loading to flash");
flash_load(Name);
P = (byte *)flash_start;
return P;
}
}
/** LoadCart() ***********************************************/
/** Load a cartridge ROM from .ROM file into given slot. **/
/*************************************************************/
int LoadCart(const char *Name,int Slot)
{
char C1,C2;
int C3,ROM64,LastFirst;
/* Check slot #, try to open file */
if((Slot!=0)&&(Slot!=1)) return(0);
int Size = emu_FileSize(Name);
int f = emu_FileOpen(Name,"r+b");
if(!f) return(0);
if(Verbose) emu_printf(Name);
if(Verbose) emu_printi(Size);
/* Check "AB" signature in a file */
ROM64=LastFirst=0;
emu_FileRead(&C1,1,f);
emu_FileRead(&C2,1,f);
/* Maybe this is a flat 64kB ROM? */
if((C1!='A')||(C2!='B')) {
if(Verbose) emu_printf("check next");
if(emu_FileSeek(f,0x4000,0)>=0)
{
emu_FileRead(&C1,1,f);
emu_FileRead(&C2,1,f);
ROM64=(C1=='A')&&(C2=='B');
}
}
/* Maybe it is the last page that contains "AB" signature? */
if((C1!='A')||(C2!='B')) {
if(Verbose) emu_printf("check next");
if(emu_FileSeek(f,Size-0x4000,0)>=0)
{
emu_FileRead(&C1,1,f);
emu_FileRead(&C2,1,f);
LastFirst=(C1=='A')&&(C2=='B');
}
}
/* If we can't find "AB" signature, drop out */
if((C1!='A')||(C2!='B'))
{
if(Verbose) emu_printf(" Not a valid cartridge ROM");
emu_FileClose(f);
return(0);
}
if(Verbose) {
emu_printf(" Cartridge");
char slot[2] = {0,0};
slot[0] = 'A'+Slot;
emu_printf(slot);
}
/* Length must be a multiple of 8kB */
/* Flat 64kB ROM must be 40..64kB */
//if(Size&0x1FFF) { emu_printf("failed");return(0); }
//if(ROM64&&(Size<0xA000)) { emu_printf("failed");return(0); }
//if(ROM64&&(Size>0x10000)) { emu_printf("failed");return(0); }
/* Show ROM type and size */
//if(Verbose)
// printf
// (
// "%dkB %s ROM...",C1/1024,
// !ROM64&&(C1>0x8000)? ROMNames[Slot? ROMTypeB:ROMTypeA]:"NORMAL"
// );
/* Compute size in 8kB pages */
Size >>= 13;
/* Calculate 2^n closest to number of pages */
for(C3=1;C3<Size;C3<<=1);
/* Assign ROMMask for MegaROMs */
ROMMask[Slot]=!ROM64&&(Size>4)? C3-1:0x00;
if ((Size*0x2000) <= 32768)
{
// Allocate space for the ROM
ROMData[Slot]=emu_Malloc(C3*0x2000);
if(!ROMData[Slot]) {
emu_printf("failed");
return(0);
}
Chunks[CCount++]=ROMData[Slot];
// Try loading ROM
byte * P = LoadCARTROM(Name,Size*0x2000,ROMData[Slot]);
if(!P) {
emu_printf("failed");
return(0);
}
ROMData[Slot] = P;
// Mirror ROM if it is smaller than 2^n pages
if(Size<C3) {
emu_printf("mirroring rom");
memcpy
(
ROMData[Slot]+Size*0x2000,
ROMData[Slot]+(Size-C3/2)*0x2000,
(C3-Size)*0x2000
);
}
}
else
{
ROMData[Slot] = LoadCARTROM(Name,Size*0x2000,NULL);
}
/* Set memory map depending on the ROM size */
switch(Size)
{
case 1:
/* 8kB ROMs are mirrored 8 times: 0:0:0:0:0:0:0:0 */
MemMap[Slot+1][0][0]=ROMData[Slot];
MemMap[Slot+1][0][1]=ROMData[Slot];
MemMap[Slot+1][0][2]=ROMData[Slot];
MemMap[Slot+1][0][3]=ROMData[Slot];
MemMap[Slot+1][0][4]=ROMData[Slot];
MemMap[Slot+1][0][5]=ROMData[Slot];
MemMap[Slot+1][0][6]=ROMData[Slot];
MemMap[Slot+1][0][7]=ROMData[Slot];
break;
case 2:
/* 16kB ROMs are mirrored 4 times: 0:1:0:1:0:1:0:1 */
MemMap[Slot+1][0][0]=ROMData[Slot];
MemMap[Slot+1][0][1]=ROMData[Slot]+0x2000;
MemMap[Slot+1][0][2]=ROMData[Slot];
MemMap[Slot+1][0][3]=ROMData[Slot]+0x2000;
MemMap[Slot+1][0][4]=ROMData[Slot];
MemMap[Slot+1][0][5]=ROMData[Slot]+0x2000;
MemMap[Slot+1][0][6]=ROMData[Slot];
MemMap[Slot+1][0][7]=ROMData[Slot]+0x2000;
break;
case 3:
case 4:
/* 24kB and 32kB ROMs are mirrored twice: 0:1:0:1:2:3:2:3 */
MemMap[Slot+1][0][0]=ROMData[Slot];
MemMap[Slot+1][0][1]=ROMData[Slot]+0x2000;
MemMap[Slot+1][0][2]=ROMData[Slot];
MemMap[Slot+1][0][3]=ROMData[Slot]+0x2000;
MemMap[Slot+1][0][4]=ROMData[Slot]+0x4000;
MemMap[Slot+1][0][5]=ROMData[Slot]+0x6000;
MemMap[Slot+1][0][6]=ROMData[Slot]+0x4000;
MemMap[Slot+1][0][7]=ROMData[Slot]+0x6000;
break;
default:
if(ROM64)
{
/* 64kB ROMs are loaded to fill slot: 0:1:2:3:4:5:6:7 */
MemMap[Slot+1][0][0]=ROMData[Slot];
MemMap[Slot+1][0][1]=ROMData[Slot]+0x2000;
MemMap[Slot+1][0][2]=ROMData[Slot]+0x4000;
MemMap[Slot+1][0][3]=ROMData[Slot]+0x6000;
MemMap[Slot+1][0][4]=ROMData[Slot]+0x8000;
MemMap[Slot+1][0][5]=ROMData[Slot]+0xA000;
MemMap[Slot+1][0][6]=ROMData[Slot]+0xC000;
MemMap[Slot+1][0][7]=ROMData[Slot]+0xE000;
}
else
{
/* MegaROMs are switched into 4000h-BFFFh */
if(!LastFirst) SetMegaROM(Slot,0,1,2,3);
else SetMegaROM(Slot,Size-2,Size-1,Size-2,Size-1);
}
break;
}
/* Show starting address */
if(Verbose) {
emu_printf("starts at");
emu_printi(MemMap[Slot+1][0][2][2]+256*MemMap[Slot+1][0][2][3]);
}
/* Done loading cartridge */
return(1);
}
/** SetIRQ() *************************************************/
/** Set or reset IRQ. Returns IRQ vector assigned to **/
/** CPU.IRequest. When upper bit of IRQ is 1, IRQ is reset. **/
/*************************************************************/
word SetIRQ(register byte IRQ)
{
if(IRQ&0x80) IRQPending&=IRQ; else IRQPending|=IRQ;
CPU.IRequest=IRQPending? INT_IRQ:INT_NONE;
return(CPU.IRequest);
}
/** SetScreen() **********************************************/
/** Change screen mode. Returns new screen mode. **/
/*************************************************************/
byte SetScreen(void)
{
register byte I,J;
switch(((VDP[0]&0x0E)>>1)|(VDP[1]&0x18))
{
case 0x10: J=0;break;
case 0x00: J=1;break;
case 0x01: J=2;break;
case 0x08: J=3;break;
case 0x02: J=4;break;
case 0x03: J=5;break;
case 0x04: J=6;break;
case 0x05: J=7;break;
case 0x07: J=8;break;
case 0x12: J=MAXSCREEN+1;break;
default: J=ScrMode;break;
}
/* Recompute table addresses */
I=(J>6)&&(J!=MAXSCREEN+1)? 11:10;
ChrTab = VRAM+((int)(VDP[2]&MSK[J].R2)<<I);
ChrGen = VRAM+((int)(VDP[4]&MSK[J].R4)<<11);
ColTab = VRAM+((int)(VDP[3]&MSK[J].R3)<<6)+((int)VDP[10]<<14);
SprTab = VRAM+((int)(VDP[5]&MSK[J].R5)<<7)+((int)VDP[11]<<15);
SprGen = VRAM+((int)VDP[6]<<11);
ChrTabM = ((int)(VDP[2]|~MSK[J].M2)<<I)|((1<<I)-1);
ChrGenM = ((int)(VDP[4]|~MSK[J].M4)<<11)|0x007FF;
ColTabM = ((int)(VDP[3]|~MSK[J].M3)<<6)|0x1C03F;
SprTabM = ((int)(VDP[5]|~MSK[J].M5)<<7)|0x1807F;
/* Return new screen mode */
ScrMode=J;
return(J);
}
/** SetMegaROM() *********************************************/
/** Set MegaROM pages for a given slot. SetMegaROM() always **/
/** assumes 8kB pages. **/
/*************************************************************/
void SetMegaROM(int Slot,byte P0,byte P1,byte P2,byte P3)
{
P0&=ROMMask[Slot];
P1&=ROMMask[Slot];
P2&=ROMMask[Slot];
P3&=ROMMask[Slot];
MemMap[Slot+1][0][2]=ROMData[Slot]+P0*0x2000;
MemMap[Slot+1][0][3]=ROMData[Slot]+P1*0x2000;
MemMap[Slot+1][0][4]=ROMData[Slot]+P2*0x2000;
MemMap[Slot+1][0][5]=ROMData[Slot]+P3*0x2000;
ROMMapper[Slot][0]=P0;
ROMMapper[Slot][1]=P1;
ROMMapper[Slot][2]=P2;
ROMMapper[Slot][3]=P3;
}
/** VDPOut() *************************************************/
/** Write value into a given VDP register. **/
/*************************************************************/
void VDPOut(register byte R,register byte V)
{
register byte J;
switch(R)
{
case 0: /* Reset HBlank interrupt if disabled */
if((VDPStatus[1]&0x01)&&!(V&0x10))
{
VDPStatus[1]&=0xFE;
SetIRQ(~INT_IE1);
}
/* Set screen mode */
if(VDP[0]!=V) { VDP[0]=V;SetScreen(); }
break;
case 1: /* Set/Reset VBlank interrupt if enabled or disabled */
if(VDPStatus[0]&0x80) SetIRQ(V&0x20? INT_IE0:~INT_IE0);
/* Set screen mode */
if(VDP[1]!=V) { VDP[1]=V;SetScreen(); }
break;
case 2: J=(ScrMode>6)&&(ScrMode!=MAXSCREEN+1)? 11:10;
ChrTab = VRAM+((int)(V&MSK[ScrMode].R2)<<J);
ChrTabM = ((int)(V|~MSK[ScrMode].M2)<<J)|((1<<J)-1);
break;
case 3: ColTab = VRAM+((int)(V&MSK[ScrMode].R3)<<6)+((int)VDP[10]<<14);
ColTabM = ((int)(V|~MSK[ScrMode].M3)<<6)|0x1C03F;
break;
case 4: ChrGen = VRAM+((int)(V&MSK[ScrMode].R4)<<11);
ChrGenM = ((int)(V|~MSK[ScrMode].M4)<<11)|0x007FF;
break;
case 5: SprTab = VRAM+((int)(V&MSK[ScrMode].R5)<<7)+((int)VDP[11]<<15);
SprTabM = ((int)(V|~MSK[ScrMode].M5)<<7)|0x1807F;
break;
case 6: V&=0x3F;SprGen=VRAM+((int)V<<11);break;
case 7: FGColor=V>>4;BGColor=V&0x0F;break;
case 10: V&=0x07;
ColTab=VRAM+((int)(VDP[3]&MSK[ScrMode].R3)<<6)+((int)V<<14);
break;
case 11: V&=0x03;
SprTab=VRAM+((int)(VDP[5]&MSK[ScrMode].R5)<<7)+((int)V<<15);
break;
case 14: V&=VRAMPages-1;VPAGE=VRAM+((int)V<<14);
break;
case 15: V&=0x0F;break;
case 16: V&=0x0F;PKey=1;break;
case 17: V&=0xBF;break;
case 25: VDP[25]=V;
SetScreen();
break;
case 44: VDPWrite(V);break;
case 46: VDPDraw(V);break;
}
/* Write value into a register */
VDP[R]=V;
}
/** Printer() ************************************************/
/** Send a character to the printer. **/
/*************************************************************/
#ifdef unused
void Printer(byte V) { fputc(V,PrnStream); }
#else
void Printer(byte V) { }
#endif
/** PPIOut() *************************************************/
/** This function is called on each write to PPI to make **/
/** key click sound, motor relay clicks, and so on. **/
/*************************************************************/
void PPIOut(register byte New,register byte Old)
{
/* Keyboard click bit */
if((New^Old)&0x80) Drum(DRM_CLICK,64);
/* Motor relay bit */
if((New^Old)&0x10) Drum(DRM_CLICK,255);
}
byte RTCIn(register byte R)
{
register byte J;
/* Only 16 registers/mode */
R&=0x0F;
/* Bank mode 0..3 */
J=RTCMode&0x03;
if(R>12) J=R==13? RTCMode:NORAM;
else
if(J) J=RTC[J][R];
else
{
#ifdef unused
static time_t PrevTime;
static struct tm TM;
/* Retrieve system time if any time passed */
time_t CurTime=time(NULL);
if(CurTime!=PrevTime)
{
TM=*localtime(&CurTime);
PrevTime=CurTime;
}
/* Parse contents of last retrieved TM */
switch(R)
{
case 0: J=TM.tm_sec%10;break;
case 1: J=TM.tm_sec/10;break;
case 2: J=TM.tm_min%10;break;
case 3: J=TM.tm_min/10;break;
case 4: J=TM.tm_hour%10;break;
case 5: J=TM.tm_hour/10;break;
case 6: J=TM.tm_wday;break;
case 7: J=TM.tm_mday%10;break;
case 8: J=TM.tm_mday/10;break;
case 9: J=(TM.tm_mon+1)%10;break;
case 10: J=(TM.tm_mon+1)/10;break;
case 11: J=(TM.tm_year-80)%10;break;
case 12: J=((TM.tm_year-80)/10)%10;break;
default: J=0x0F;break;
}
#endif
}
/* Four upper bits are always high */
return(J|0xF0);
}
/** LoopZ80() ************************************************/
/** Refresh screen, check keyboard and sprites. Call this **/
/** function on each interrupt. **/
/*************************************************************/
word LoopZ80(register Z80 *R, int * ras)
//word LoopZ80(Z80 *R)
{
static byte BFlag=0;
static byte BCount=0;
static int UCount=1;
static byte ACount=0;
static byte Drawing=0;
register int J;
/* Flip HRefresh bit */
VDPStatus[2]^=0x20;
/* If HRefresh is now in progress... */
if(!(VDPStatus[2]&0x20))
{
/* HRefresh takes most of the scanline */
R->IPeriod=!ScrMode||(ScrMode==MAXSCREEN+1)? CPU_H240:CPU_H256;
/* New scanline */
ScanLine=ScanLine<(PALVideo? 312:261)? ScanLine+1:0;
/* If first scanline of the screen... */
if(!ScanLine)
{
/* Drawing now... */
Drawing=1;
/* Reset VRefresh bit */
VDPStatus[2]&=0xBF;
/* Refresh display */
if(UCount) UCount--;
else
{
UCount=UPeriod-1;
//RefreshScreen();
}
/* Blinking for TEXT80 */
if(BCount) BCount--;
else
{
BFlag=!BFlag;
if(!VDP[13]) { XFGColor=FGColor;XBGColor=BGColor; }
else
{
BCount=(BFlag? VDP[13]&0x0F:VDP[13]>>4)*10;
if(BCount)
{
if(BFlag) { XFGColor=FGColor;XBGColor=BGColor; }
else { XFGColor=VDP[12]>>4;XBGColor=VDP[12]&0x0F; }
}
}
}
}
/* Line coincidence is active at 0..255 */
/* in PAL and 0..234/244 in NTSC */
J=PALVideo? 256:ScanLines212? 245:235;
/* When reaching end of screen, reset line coincidence */
if(ScanLine==J)
{
VDPStatus[1]&=0xFE;
SetIRQ(~INT_IE1);
}
/* When line coincidence is active... */
if(ScanLine<J)
{
/* Line coincidence processing */
J=(((ScanLine+VScroll)&0xFF)-VDP[19])&0xFF;
if(J==2)
{
/* Set HBlank flag on line coincidence */
VDPStatus[1]|=0x01;
/* Generate IE1 interrupt */
if(VDP[0]&0x10) SetIRQ(INT_IE1);
}
else
{
/* Reset flag immediately if IE1 interrupt disabled */
if(!(VDP[0]&0x10)) VDPStatus[1]&=0xFE;
}
}
/* Return whatever interrupt is pending */
R->IRequest=IRQPending? INT_IRQ:INT_NONE;
return(R->IRequest);
}
/*********************************/
/* We come here for HBlanks only */
/*********************************/
/* HBlank takes HPeriod-HRefresh */
R->IPeriod=!ScrMode||(ScrMode==MAXSCREEN+1)? CPU_H240:CPU_H256;
R->IPeriod=HPeriod-R->IPeriod;
/* If last scanline of VBlank, see if we need to wait more */
J=PALVideo? 313:262;
if(ScanLine>=J-1)
{
J*=CPU_HPERIOD;
if(VPeriod>J) R->IPeriod+=VPeriod-J;
}
/* If first scanline of the bottom border... */
if(ScanLine==(ScanLines212? 212:192)) Drawing=0;
/* If first scanline of VBlank... */
J=PALVideo? (ScanLines212? 212+42:192+52):(ScanLines212? 212+18:192+28);
if(!Drawing&&(ScanLine==J))
{
/* Set VBlank bit, set VRefresh bit */
VDPStatus[0]|=0x80;
VDPStatus[2]|=0x40;
/* Generate VBlank interrupt */
if(VDP[1]&0x20) SetIRQ(INT_IE0);
}
/* Run V9938 engine */
LoopVDP();
/* Refresh scanline, possibly with the overscan */
if(!UCount&&Drawing&&(ScanLine<256))
{
if(!ModeYJK||(ScrMode<7)||(ScrMode>8))
(RefreshLine[ScrMode])(ScanLine);
else
if(ModeYAE) RefreshLine10(ScanLine);
else RefreshLine12(ScanLine);
emu_DrawLinePal16(&linebuffer[0], WIDTH , HEIGHT, ScanLine+FirstLine);
}
/* Keyboard, sound, and other stuff always runs at line 192 */
/* This way, it can't be shut off by overscan tricks (Maarten) */
if(ScanLine==192)
{
/* Check sprites and set Collision, 5Sprites, 5thSprite bits */
if(!SpritesOFF&&ScrMode&&(ScrMode<MAXSCREEN+1)) CheckSprites();
/* Count MIDI ticks */
#ifdef unused
MIDITicks(VPeriod/CPU_CLOCK);
#endif
/* Update AY8910 state every VPeriod/CPU_CLOCK milliseconds */
Loop8910(&PSG,VPeriod/CPU_CLOCK);
/* Flush changes to the sound channels */
Sync8910(&PSG,AY8910_FLUSH|(UseDrums? AY8910_DRUMS:0));
SyncSCC(&SCChip,SCC_FLUSH);
Sync2413(&OPLL,YM2413_FLUSH);
/* Check keyboard */
Keyboard();
/* Exit emulation if requested */
//if(ExitNow) return(INT_QUIT);
*ras = 1;
/* Autofire emulation */
ACount=(ACount+1)&0x07;
if((ACount>3)&&AutoFire) KeyMap[8]|=0x01;
}
/* Return whatever interrupt is pending */
R->IRequest=IRQPending? INT_IRQ:INT_NONE;
return(R->IRequest);
}
/** CheckSprites() *******************************************/
/** Check for sprite collisions and 5th/9th sprite in a **/
/** row. **/
/*************************************************************/
void CheckSprites(void)
{
register word LS,LD;
register byte DH,DV,*PS,*PD,*T;
byte I,J,N,M,*S,*D;
/* Clear 5Sprites, Collision, and 5thSprite bits */
VDPStatus[0]=(VDPStatus[0]&0x9F)|0x1F;
for(N=0,S=SprTab;(N<32)&&(S[0]!=208);N++,S+=4);
M=SolidColor0;
if(Sprites16x16)
{
for(J=0,S=SprTab;J<N;J++,S+=4)
if((S[3]&0x0F)||M)
for(I=J+1,D=S+4;I<N;I++,D+=4)
if((D[3]&0x0F)||M)
{
DV=S[0]-D[0];
if((DV<16)||(DV>240))
{
DH=S[1]-D[1];
if((DH<16)||(DH>240))
{
PS=SprGen+((int)(S[2]&0xFC)<<3);
PD=SprGen+((int)(D[2]&0xFC)<<3);
if(DV<16) PD+=DV; else { DV=256-DV;PS+=DV; }
if(DH>240) { DH=256-DH;T=PS;PS=PD;PD=T; }
while(DV<16)
{
LS=((word)*PS<<8)+*(PS+16);
LD=((word)*PD<<8)+*(PD+16);
if(LD&(LS>>DH)) break;
else { DV++;PS++;PD++; }
}
if(DV<16) { VDPStatus[0]|=0x20;return; }
}
}
}
}
else
{
for(J=0,S=SprTab;J<N;J++,S+=4)
if((S[3]&0x0F)||M)
for(I=J+1,D=S+4;I<N;I++,D+=4)
if((D[3]&0x0F)||M)
{
DV=S[0]-D[0];
if((DV<8)||(DV>248))
{
DH=S[1]-D[1];
if((DH<8)||(DH>248))
{
PS=SprGen+((int)S[2]<<3);
PD=SprGen+((int)D[2]<<3);
if(DV<8) PD+=DV; else { DV=256-DV;PS+=DV; }
if(DH>248) { DH=256-DH;T=PS;PS=PD;PD=T; }
while((DV<8)&&!(*PD&(*PS>>DH))) { DV++;PS++;PD++; }
if(DV<8) { VDPStatus[0]|=0x20;return; }
}
}
}
}
}
/** GuessROM() ***********************************************/
/** Guess MegaROM mapper of a ROM. **/
/*************************************************************/
int GuessROM(const byte *Buf,int Size)
{
int J,I,ROMCount[6];
/* Clear all counters */
for(J=0;J<6;J++) ROMCount[J]=1;
ROMCount[0]+=1; /* Mapper #0 is default */
ROMCount[4]-=1; /* #5 preferred over #4 */
/* Count occurences of characteristic addresses */
for(J=0;J<Size-2;J++)
{
I=Buf[J]+((int)Buf[J+1]<<8)+((int)Buf[J+2]<<16);
switch(I)
{
case 0x500032: ROMCount[2]++;break;
case 0x900032: ROMCount[2]++;break;
case 0xB00032: ROMCount[2]++;break;
case 0x400032: ROMCount[3]++;break;
case 0x800032: ROMCount[3]++;break;
case 0xA00032: ROMCount[3]++;break;
case 0x680032: ROMCount[4]++;break;
case 0x780032: ROMCount[4]++;break;
case 0x600032: ROMCount[3]++;ROMCount[4]++;ROMCount[5]++;break;
case 0x700032: ROMCount[2]++;ROMCount[4]++;ROMCount[5]++;break;
case 0x77FF32: ROMCount[5]++;break;
}
}
/* Find which mapper type got more hits */
for(I=0,J=0;J<6;J++)
if(ROMCount[J]>ROMCount[I]) I=J;
/* Return the most likely mapper type */
return(I);
}
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