From a77a4d354a70be4cb8b04b228a621422e429c229 Mon Sep 17 00:00:00 2001
From: Marco Maccaferri <marco.maccaferri@maccasoft.com>
Date: Sat, 8 Aug 2020 12:17:09 +0200
Subject: [PATCH] Removed unused I/O array

---
 src/com/maccasoft/tools/Application.java |  6 +++---
 src/com/maccasoft/tools/TMS9918.java     |  4 ++--
 src/z80core/MemIoOps.java                | 14 ++------------
 3 files changed, 7 insertions(+), 17 deletions(-)

diff --git a/src/com/maccasoft/tools/Application.java b/src/com/maccasoft/tools/Application.java
index 4685186..5eed7a4 100644
--- a/src/com/maccasoft/tools/Application.java
+++ b/src/com/maccasoft/tools/Application.java
@@ -2441,7 +2441,7 @@ public class Application {
                         debugTMS9918.redraw();
                     }
 
-                    memIoOps = new MemIoOps(65536, 256) {
+                    memIoOps = new MemIoOps(65536) {
 
                         public final static int SIOA_D = 0x81;
                         public final static int SIOA_C = 0x80;
@@ -2491,7 +2491,7 @@ public class Application {
                                 return tms9918.inReg();
                             }
 
-                            return super.inPort(port & 0xFF);
+                            return super.inPort(port);
                         }
 
                         @Override
@@ -2515,7 +2515,7 @@ public class Application {
                             if ((port & 0xFF) == preferences.getTms9918Register()) {
                                 tms9918.outReg(value);
                             }
-                            super.outPort(port & 0xFF, value);
+                            super.outPort(port, value);
                         }
 
                     };
diff --git a/src/com/maccasoft/tools/TMS9918.java b/src/com/maccasoft/tools/TMS9918.java
index 12c846a..faac0bc 100644
--- a/src/com/maccasoft/tools/TMS9918.java
+++ b/src/com/maccasoft/tools/TMS9918.java
@@ -126,13 +126,13 @@ public class TMS9918 {
     public int inRam() {
         int result = ram[ramPtr] & 0xFF;
         ramPtr = (ramPtr + 1) & 0x3FFF;
-        return result;
+        return result & 0xFF;
     }
 
     public int inReg() {
         int result = status;
         status &= ~0x80;
-        return result;
+        return result & 0xFF;
     }
 
     public void processFrame(long elapsedTimeNs) {
diff --git a/src/z80core/MemIoOps.java b/src/z80core/MemIoOps.java
index 3caa434..817333d 100644
--- a/src/z80core/MemIoOps.java
+++ b/src/z80core/MemIoOps.java
@@ -12,7 +12,6 @@ package z80core;
 public class MemIoOps {
 
     private byte[] z80Ram;
-    private byte[] z80Ports;
 
     protected long tstates = 0;
 
@@ -20,7 +19,7 @@ public class MemIoOps {
 
     }
 
-    public MemIoOps(int ramSize, int portSize) {
+    public MemIoOps(int ramSize) {
         if (ramSize < 0 || ramSize > 0x10000) {
             throw new IndexOutOfBoundsException("ramSize Out of Range [0x0000 - 0x10000");
         }
@@ -28,14 +27,6 @@ public class MemIoOps {
         if (ramSize > 0) {
             z80Ram = new byte[ramSize];
         }
-
-        if (portSize < 0 || portSize > 0x10000) {
-            throw new IndexOutOfBoundsException("portSize Out of Range [0x0000 - 0x10000");
-        }
-
-        if (portSize > 0) {
-            z80Ports = new byte[portSize];
-        }
     }
 
     public byte[] getRam() {
@@ -79,12 +70,11 @@ public class MemIoOps {
 
     public int inPort(int port) {
         tstates += 4; // 4 clocks for read byte from bus
-        return z80Ports[port & 0xFFFF] & 0xff;
+        return port & 0xff;
     }
 
     public void outPort(int port, int value) {
         tstates += 4; // 4 clocks for write byte to bus
-        z80Ports[port & 0xFFFF] = (byte) value;
     }
 
     public void addressOnBus(int address, int tstates) {