X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=Pico%2FMemory.c;h=c9c9a020cc0f9a000f930bc9d56934b13478f3a0;hb=fa1e5e2948e9b06dec3353081081173f7ae4d742;hp=509fead95aa9c05b81594f65428d1e39a3776dc4;hpb=3a81ecde1cf95372e27a3e6ca6f9c2cccc86e272;p=picodrive.git

diff --git a/Pico/Memory.c b/Pico/Memory.c
index 509fead..c9c9a02 100644
--- a/Pico/Memory.c
+++ b/Pico/Memory.c
@@ -107,71 +107,12 @@ static int SRAMRead(u32 a)
 }
 #endif
 
-static int PadRead(int i)
-{
-  int pad=0,value=0,TH;
-  pad=~PicoPad[i]; // Get inverse of pad MXYZ SACB RLDU
-  TH=Pico.ioports[i+1]&0x40;
-
-  if(PicoOpt & 0x20) { // 6 button gamepad enabled
-    int phase = Pico.m.padTHPhase[i];
-
-    if(phase == 2 && !TH) {
-      value=(pad&0xc0)>>2;              // ?0SA 0000
-      goto end;
-    } else if(phase == 3 && TH) {
-      value=(pad&0x30)|((pad>>8)&0xf);  // ?1CB MXYZ
-      goto end;
-    } else if(phase == 3 && !TH) {
-      value=((pad&0xc0)>>2)|0x0f;       // ?0SA 1111
-      goto end;
-    }
-  }
-
-  if(TH) value=(pad&0x3f);              // ?1CB RLDU
-  else   value=((pad&0xc0)>>2)|(pad&3); // ?0SA 00DU
-
-  end:
-
-  // orr the bits, which are set as output
-  value |= Pico.ioports[i+1]&Pico.ioports[i+4];
-
-  return value; // will mirror later
-}
-
-u8 z80Read8(u32 a)
-{
-  if(Pico.m.z80Run&1) return 0;
-
-  a&=0x1fff;
-
-  if(!(PicoOpt&4)) {
-    // Z80 disabled, do some faking
-    static u8 zerosent = 0;
-    if(a == Pico.m.z80_lastaddr) { // probably polling something
-      u8 d = Pico.m.z80_fakeval;
-      if((d & 0xf) == 0xf && !zerosent) {
-        d = 0; zerosent = 1;
-      } else {
-        Pico.m.z80_fakeval++;
-        zerosent = 0;
-      }
-      return d;
-    } else {
-      Pico.m.z80_fakeval = 0;
-    }
-  }
-
-  Pico.m.z80_lastaddr = (u16) a;
-  return Pico.zram[a];
-}
-
 
 // for nonstandard reads
 #ifndef _ASM_MEMORY_C
 static
 #endif
-u32 UnusualRead16(u32 a, int realsize)
+u32 OtherRead16End(u32 a, int realsize)
 {
   u32 d=0;
 
@@ -242,109 +183,11 @@ end:
   return d;
 }
 
-#ifndef _ASM_MEMORY_C
-static
-#endif
-u32 OtherRead16(u32 a, int realsize)
-{
-  u32 d=0;
-
-  if ((a&0xff0000)==0xa00000) {
-    if ((a&0x4000)==0x0000) { d=z80Read8(a); d|=d<<8; goto end; } // Z80 ram (not byteswaped)
-    if ((a&0x6000)==0x4000) { if(PicoOpt&1) d=YM2612Read(); else d=Pico.m.rotate++&3; dprintf("read ym2612: %04x", d); goto end; } // 0x4000-0x5fff, Fudge if disabled
-    d=0xffff; goto end;
-  }
-  if ((a&0xffffe0)==0xa10000) { // I/O ports
-    a=(a>>1)&0xf;
-    switch(a) {
-      case 0:  d=Pico.m.hardware; break; // Hardware value (Version register)
-      case 1:  d=PadRead(0); d|=Pico.ioports[1]&0x80; break;
-      case 2:  d=PadRead(1); d|=Pico.ioports[2]&0x80; break;
-      default: d=Pico.ioports[a]; break; // IO ports can be used as RAM
-    }
-    d|=d<<8;
-    goto end;
-  }
-  // |=0x80 for Shadow of the Beast & Super Offroad; rotate fakes next fetched instruction for Time Killers
-  if (a==0xa11100) {
-    d=Pico.m.z80Run&1;
-#if 0
-    if (!d) {
-      // do we need this?
-      extern int z80stopCycle; // TODO: tidy
-      int stop_before = SekCyclesDone() - z80stopCycle;
-      if (stop_before > 0 && stop_before <= 16) // Gens uses 16 here
-        d = 1; // bus not yet available
-    }
-#endif
-    d=(d<<8)|0x8000|Pico.m.rotate++;
-    dprintf("get_zrun: %04x [%i|%i] @%06x", d, Pico.m.scanline, SekCyclesDone(), SekPc);
-    goto end; }
-
-#ifndef _ASM_MEMORY_C
-  if ((a&0xe700e0)==0xc00000) { d=PicoVideoRead(a); goto end; }
-#endif
-
-  d = UnusualRead16(a, realsize);
-
-end:
-  return d;
-}
 
 //extern UINT32 mz80GetRegisterValue(void *, UINT32);
 
-static void OtherWrite8(u32 a,u32 d,int realsize)
+static void OtherWrite8End(u32 a,u32 d,int realsize)
 {
-  if ((a&0xe700f9)==0xc00011||(a&0xff7ff9)==0xa07f11) { if(PicoOpt&2) SN76496Write(d); return; } // PSG Sound
-  if ((a&0xff4000)==0xa00000)  { if(!(Pico.m.z80Run&1)) Pico.zram[a&0x1fff]=(u8)d; return; } // Z80 ram
-  if ((a&0xff6000)==0xa04000)  { if(PicoOpt&1) emustatus|=YM2612Write(a&3, d); return; } // FM Sound
-  if ((a&0xffffe0)==0xa10000)  { // I/O ports
-    a=(a>>1)&0xf;
-    // 6 button gamepad: if TH went from 0 to 1, gamepad changes state
-    if(PicoOpt&0x20) {
-      if(a==1) {
-        Pico.m.padDelay[0] = 0;
-        if(!(Pico.ioports[1]&0x40) && (d&0x40)) Pico.m.padTHPhase[0]++;
-      }
-      else if(a==2) {
-        Pico.m.padDelay[1] = 0;
-        if(!(Pico.ioports[2]&0x40) && (d&0x40)) Pico.m.padTHPhase[1]++;
-      }
-    }
-    Pico.ioports[a]=(u8)d; // IO ports can be used as RAM
-    return;
-  }
-  if (a==0xa11100) {
-    extern int z80startCycle, z80stopCycle;
-    //int lineCycles=(488-SekCyclesLeft)&0x1ff;
-    d&=1; d^=1;
-    if(!d) {
-      // this is for a nasty situation where Z80 was enabled and disabled in the same 68k timeslice (Golden Axe III)
-      if (Pico.m.z80Run) {
-        int lineCycles=(488-SekCyclesLeft)&0x1ff;
-        z80stopCycle = SekCyclesDone();
-        lineCycles=(lineCycles>>1)-(lineCycles>>5);
-        z80_run(lineCycles);
-      }
-    } else {
-      z80startCycle = SekCyclesDone();
-      //if(Pico.m.scanline != -1)
-    }
-    dprintf("set_zrun: %02x [%i|%i] @%06x", d, Pico.m.scanline, SekCyclesDone(), /*mz80GetRegisterValue(NULL, 0),*/ SekPc);
-    Pico.m.z80Run=(u8)d; return;
-  }
-  if (a==0xa11200) { dprintf("write z80Reset: %02x", d); if(!(d&1)) z80_reset(); return; }
-
-  if ((a&0xff7f00)==0xa06000) // Z80 BANK register
-  {
-    Pico.m.z80_bank68k>>=1;
-    Pico.m.z80_bank68k|=(d&1)<<8;
-    Pico.m.z80_bank68k&=0x1ff; // 9 bits and filled in the new top one
-    return;
-  }
-
-  if ((a&0xe700e0)==0xc00000)  { PicoVideoWrite(a,(u16)(d|(d<<8))); return; } // Byte access gets mirrored
-
   // sram
   //if(a==0x200000) dprintf("cc : %02x @ %06x [%i|%i]", d, SekPc, SekCyclesDoneT(), SekCyclesDone());
   //if(a==0x200001) dprintf("w8 : %02x @ %06x [%i]", d, SekPc, SekCyclesDoneT());
@@ -408,33 +251,9 @@ static void OtherWrite8(u32 a,u32 d,int realsize)
     Pico.m.prot_bytes[(a>>2)&1] = (u8)d;
 }
 
-static void OtherWrite16(u32 a,u32 d)
-{
-  if ((a&0xe700e0)==0xc00000) { PicoVideoWrite(a,(u16)d); return; }
-  if ((a&0xff4000)==0xa00000) { if(!(Pico.m.z80Run&1)) Pico.zram[a&0x1fff]=(u8)(d>>8); return; } // Z80 ram (MSB only)
-
-  if ((a&0xffffe0)==0xa10000) { // I/O ports
-    a=(a>>1)&0xf;
-    // 6 button gamepad: if TH went from 0 to 1, gamepad changes state
-    if(PicoOpt&0x20) {
-      if(a==1) {
-        Pico.m.padDelay[0] = 0;
-        if(!(Pico.ioports[1]&0x40) && (d&0x40)) Pico.m.padTHPhase[0]++;
-      }
-      else if(a==2) {
-        Pico.m.padDelay[1] = 0;
-        if(!(Pico.ioports[2]&0x40) && (d&0x40)) Pico.m.padTHPhase[1]++;
-      }
-    }
-    Pico.ioports[a]=(u8)d; // IO ports can be used as RAM
-    return;
-  }
-  if (a==0xa11100) { OtherWrite8(a, d>>8, 16); return; }
-  if (a==0xa11200) { dprintf("write z80reset: %04x", d); if(!(d&0x100)) z80_reset(); return; }
 
-  OtherWrite8(a,  d>>8, 16);
-  OtherWrite8(a+1,d&0xff, 16);
-}
+#include "MemoryCmn.c"
+
 
 // -----------------------------------------------------------------
 //                     Read Rom and read Ram