kopia lustrzana https://github.com/Jean-MarcHarvengt/MCUME
77 wiersze
2.8 KiB
C
77 wiersze
2.8 KiB
C
#ifndef Z80_H
|
|
#define Z80_H
|
|
|
|
|
|
/*#define CLEAR_LINE 0*/ /* clear (a fired, held or pulsed) line */
|
|
/*#define ASSERT_LINE 1*/ /* assert an interrupt immediately */
|
|
|
|
#include "cpuintrf.h"
|
|
|
|
enum {
|
|
Z80_PC=1, Z80_SP, Z80_AF, Z80_BC, Z80_DE, Z80_HL,
|
|
Z80_IX, Z80_IY, Z80_AF2, Z80_BC2, Z80_DE2, Z80_HL2,
|
|
Z80_R, Z80_I, Z80_IM, Z80_IFF1, Z80_IFF2, Z80_HALT,
|
|
Z80_NMI_STATE, Z80_IRQ_STATE, Z80_DC0, Z80_DC1, Z80_DC2, Z80_DC3,
|
|
Z80_NMI_NESTING
|
|
};
|
|
|
|
extern int z80_ICount; /* T-state count */
|
|
|
|
#define Z80_IGNORE_INT -1 /* Ignore interrupt */
|
|
#define Z80_NMI_INT -2 /* Execute NMI */
|
|
#define Z80_IRQ_INT -1000 /* Execute IRQ */
|
|
|
|
/* Port number written to when entering/leaving HALT state */
|
|
#define Z80_HALT_PORT 0x10000
|
|
|
|
extern void z80_reset (void *param);
|
|
extern void z80_exit (void);
|
|
extern int z80_execute(int cycles);
|
|
extern void z80_burn(int cycles);
|
|
extern unsigned z80_get_context (void *dst);
|
|
extern void z80_set_context (void *src);
|
|
extern unsigned z80_get_pc (void);
|
|
extern void z80_set_pc (unsigned val);
|
|
extern unsigned z80_get_sp (void);
|
|
extern void z80_set_sp (unsigned val);
|
|
extern unsigned z80_get_reg (int regnum);
|
|
extern void z80_set_reg (int regnum, unsigned val);
|
|
extern void z80_set_nmi_line(int state);
|
|
extern void z80_set_irq_line(int irqline, int state);
|
|
extern void z80_set_irq_callback(int (*irq_callback)(int));
|
|
extern void z80_state_save(void *file);
|
|
extern void z80_state_load(void *file);
|
|
extern const char *z80_info(void *context, int regnum);
|
|
extern unsigned z80_dasm(char *buffer, unsigned pc);
|
|
|
|
#ifdef MAME_DEBUG
|
|
extern unsigned DasmZ80(char *buffer, unsigned pc);
|
|
#endif
|
|
|
|
/****************************************************************************/
|
|
/* The Z80 registers. HALT is set to 1 when the CPU is halted, the refresh */
|
|
/* register is calculated as follows: refresh=(Regs.R&127)|(Regs.R2&128) */
|
|
/****************************************************************************/
|
|
typedef struct {
|
|
/* 00 */ PAIR PREPC,PC,SP,AF,BC,DE,HL,IX,IY;
|
|
/* 24 */ PAIR AF2,BC2,DE2,HL2;
|
|
/* 34 */ UINT8 R,R2,IFF1,IFF2,HALT,IM,I;
|
|
/* 3B */ UINT8 irq_max; /* number of daisy chain devices */
|
|
/* 3C */ INT8 request_irq; /* daisy chain next request device */
|
|
/* 3D */ INT8 service_irq; /* daisy chain next reti handling device */
|
|
/* 3E */ UINT8 nmi_state; /* nmi line state */
|
|
/* 3F */ UINT8 irq_state; /* irq line state */
|
|
/* 40 */ UINT8 int_state[Z80_MAXDAISY];
|
|
/* 44 */ Z80_DaisyChain irq[Z80_MAXDAISY];
|
|
/* 84 */ int (*irq_callback)(int irqline);
|
|
/* 88 */ int extra_cycles; /* extra cycles for interrupts */
|
|
} Z80_Regs;
|
|
|
|
extern Z80_Regs *Z80_Context;
|
|
extern int after_EI;
|
|
extern unsigned char *cpu_readmap[8];
|
|
extern unsigned char *cpu_writemap[8];
|
|
|
|
#endif
|
|
|