X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=Pico%2FMemory.c;h=a3372d6000c174d68da3c1107b3cc47cb9495aab;hb=c6196c0f0108d27df27d576ece320b3ec5705bb3;hp=26be0129147e54d73074fd90762b986eaa06b654;hpb=3ec29f016cdeb3100dbb433dd9041e81542765bd;p=picodrive.git

diff --git a/Pico/Memory.c b/Pico/Memory.c
index 26be0129..a3372d60 100644
--- a/Pico/Memory.c
+++ b/Pico/Memory.c
@@ -7,7 +7,7 @@
 // For commercial use, separate licencing terms must be obtained.
 
 
-#define __debug_io
+//#define __debug_io
 
 #include "PicoInt.h"
 
@@ -323,7 +323,7 @@ PICO_INTERNAL_ASM u32 PicoRead8(u32 a)
 
 #ifndef EMU_CORE_DEBUG
   // sram
-  if(a >= SRam.start && a <= SRam.end && (Pico.m.sram_reg&5)) {
+  if (a >= SRam.start && a <= SRam.end && (Pico.m.sram_reg&5)) {
     d = SRAMRead(a);
     elprintf(EL_SRAMIO, "sram r8 [%06x] %02x @ %06x", a, d, SekPc);
     goto end;
@@ -334,14 +334,17 @@ PICO_INTERNAL_ASM u32 PicoRead8(u32 a)
   log_io(a, 8, 0);
   if ((a&0xff4000)==0xa00000) { d=z80Read8(a); goto end; } // Z80 Ram
 
-  d=OtherRead16(a&~1, 8); if ((a&1)==0) d>>=8;
+  if ((a&0xe700e0)==0xc00000) // VDP
+       d=PicoVideoRead(a);
+  else d=OtherRead16(a&~1, 8);
+  if ((a&1)==0) d>>=8;
 
 end:
 #ifdef __debug_io
   dprintf("r8 : %06x,   %02x @%06x", a&0xffffff, (u8)d, SekPc);
 #endif
 #ifdef EMU_CORE_DEBUG
-  if(a>=Pico.romsize/*&&(ppop&0x3f)!=0x3a&&(ppop&0x3f)!=0x3b*/) {
+  if (a>=Pico.romsize) {
     lastread_a = a;
     lastread_d[lrp_cyc++&15] = (u8)d;
   }
@@ -359,7 +362,7 @@ PICO_INTERNAL_ASM u32 PicoRead16(u32 a)
 
 #ifndef EMU_CORE_DEBUG
   // sram
-  if(a >= SRam.start && a <= SRam.end && (Pico.m.sram_reg&5)) {
+  if (a >= SRam.start && a <= SRam.end && (Pico.m.sram_reg&5)) {
     d = SRAMRead(a);
     d |= d<<8;
     elprintf(EL_SRAMIO, "sram r16 [%06x] %04x @ %06x", a, d, SekPc);
@@ -370,14 +373,16 @@ PICO_INTERNAL_ASM u32 PicoRead16(u32 a)
   if (a<Pico.romsize) { d = *(u16 *)(Pico.rom+a); goto end; } // Rom
   log_io(a, 16, 0);
 
-  d = OtherRead16(a, 16);
+  if ((a&0xe700e0)==0xc00000)
+       d = PicoVideoRead(a);
+  else d = OtherRead16(a, 16);
 
 end:
 #ifdef __debug_io
   dprintf("r16: %06x, %04x  @%06x", a&0xffffff, d, SekPc);
 #endif
 #ifdef EMU_CORE_DEBUG
-  if(a>=Pico.romsize/*&&(ppop&0x3f)!=0x3a&&(ppop&0x3f)!=0x3b*/) {
+  if (a>=Pico.romsize) {
     lastread_a = a;
     lastread_d[lrp_cyc++&15] = d;
   }
@@ -404,14 +409,16 @@ PICO_INTERNAL_ASM u32 PicoRead32(u32 a)
   if (a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+a); d = (pm[0]<<16)|pm[1]; goto end; } // Rom
   log_io(a, 32, 0);
 
-  d = (OtherRead16(a, 32)<<16)|OtherRead16(a+2, 32);
+  if ((a&0xe700e0)==0xc00000)
+       d = (PicoVideoRead(a)<<16)|PicoVideoRead(a+2);
+  else d = (OtherRead16(a, 32)<<16)|OtherRead16(a+2, 32);
 
 end:
 #ifdef __debug_io
   dprintf("r32: %06x, %08x @%06x", a&0xffffff, d, SekPc);
 #endif
 #ifdef EMU_CORE_DEBUG
-  if(a>=Pico.romsize/*&&(ppop&0x3f)!=0x3a&&(ppop&0x3f)!=0x3b*/) {
+  if (a>=Pico.romsize) {
     lastread_a = a;
     lastread_d[lrp_cyc++&15] = d;
   }
@@ -454,6 +461,7 @@ void PicoWrite16(u32 a,u16 d)
   log_io(a, 16, 1);
 
   a&=0xfffffe;
+  if ((a&0xe700e0)==0xc00000) { PicoVideoWrite(a,(u16)d); return; } // VDP
   OtherWrite16(a,d);
 }
 
@@ -476,6 +484,14 @@ static void PicoWrite32(u32 a,u32 d)
   log_io(a, 32, 1);
 
   a&=0xfffffe;
+  if ((a&0xe700e0)==0xc00000)
+  {
+    // VDP:
+    PicoVideoWrite(a,  (u16)(d>>16));
+    PicoVideoWrite(a+2,(u16)d);
+    return;
+  }
+
   OtherWrite16(a,  (u16)(d>>16));
   OtherWrite16(a+2,(u16)d);
 }
@@ -525,33 +541,36 @@ unsigned int  m68k_read_pcrelative_CD16(unsigned int a);
 unsigned int  m68k_read_pcrelative_CD32(unsigned int a);
 
 // these are allowed to access RAM
-static unsigned int  m68k_read_8 (unsigned int a, int do_fake) {
+static unsigned int  m68k_read_8 (unsigned int a, int do_fake)
+{
   a&=0xffffff;
-  if(PicoMCD&1) return m68k_read_pcrelative_CD8(a);
-  if(a<Pico.romsize)         return *(u8 *)(Pico.rom+(a^1)); // Rom
+  if(a<Pico.romsize && m68ki_cpu_p==&PicoCpuMM68k)    return *(u8 *)(Pico.rom+(a^1)); // Rom
 #ifdef EMU_CORE_DEBUG
   if(do_fake&&((ppop&0x3f)==0x3a||(ppop&0x3f)==0x3b)) return lastread_d[lrp_mus++&15];
 #endif
+  if(PicoMCD&1) return m68k_read_pcrelative_CD8(a);
   if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram
   return 0;
 }
-static unsigned int  m68k_read_16(unsigned int a, int do_fake) {
+static unsigned int  m68k_read_16(unsigned int a, int do_fake)
+{
   a&=0xffffff;
-  if(PicoMCD&1) return m68k_read_pcrelative_CD16(a);
-  if(a<Pico.romsize)         return *(u16 *)(Pico.rom+(a&~1)); // Rom
+  if(a<Pico.romsize && m68ki_cpu_p==&PicoCpuMM68k)    return *(u16 *)(Pico.rom+(a&~1)); // Rom
 #ifdef EMU_CORE_DEBUG
   if(do_fake&&((ppop&0x3f)==0x3a||(ppop&0x3f)==0x3b)) return lastread_d[lrp_mus++&15];
 #endif
+  if(PicoMCD&1) return m68k_read_pcrelative_CD16(a);
   if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram
   return 0;
 }
-static unsigned int  m68k_read_32(unsigned int a, int do_fake) {
+static unsigned int  m68k_read_32(unsigned int a, int do_fake)
+{
   a&=0xffffff;
-  if(PicoMCD&1) return m68k_read_pcrelative_CD32(a);
-  if(a<Pico.romsize)         { u16 *pm=(u16 *)(Pico.rom+(a&~1));     return (pm[0]<<16)|pm[1]; }
+  if(a<Pico.romsize && m68ki_cpu_p==&PicoCpuMM68k) { u16 *pm=(u16 *)(Pico.rom+(a&~1)); return (pm[0]<<16)|pm[1]; }
 #ifdef EMU_CORE_DEBUG
   if(do_fake&&((ppop&0x3f)==0x3a||(ppop&0x3f)==0x3b)) return lastread_d[lrp_mus++&15];
 #endif
+  if(PicoMCD&1) return m68k_read_pcrelative_CD32(a);
   if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram
   return 0;
 }
@@ -570,7 +589,8 @@ unsigned int m68k_read_disassembler_32(unsigned int a) { return m68k_read_32(a,
 unsigned int m68k_read_memory_8(unsigned int a)
 {
   u8 d;
-  if(a<Pico.romsize) d = *(u8 *) (Pico.rom+(a^1));
+  if (a<Pico.romsize && m68ki_cpu_p==&PicoCpuMM68k)
+       d = *(u8 *) (Pico.rom+(a^1));
   else d = (u8) lastread_d[lrp_mus++&15];
 #ifdef __debug_io
   dprintf("r8_mu : %06x,   %02x @%06x", a&0xffffff, d, SekPc);
@@ -580,7 +600,8 @@ unsigned int m68k_read_memory_8(unsigned int a)
 unsigned int m68k_read_memory_16(unsigned int a)
 {
   u16 d;
-  if(a<Pico.romsize) d = *(u16 *)(Pico.rom+(a&~1));
+  if (a<Pico.romsize && m68ki_cpu_p==&PicoCpuMM68k)
+       d = *(u16 *)(Pico.rom+(a&~1));
   else d = (u16) lastread_d[lrp_mus++&15];
 #ifdef __debug_io
   dprintf("r16_mu: %06x, %04x @%06x", a&0xffffff, d, SekPc);
@@ -590,7 +611,9 @@ unsigned int m68k_read_memory_16(unsigned int a)
 unsigned int m68k_read_memory_32(unsigned int a)
 {
   u32 d;
-  if(a<Pico.romsize) {u16 *pm=(u16 *)(Pico.rom+(a&~1));d=(pm[0]<<16)|pm[1];}
+  if (a<Pico.romsize && m68ki_cpu_p==&PicoCpuMM68k)
+       { u16 *pm=(u16 *)(Pico.rom+(a&~1));d=(pm[0]<<16)|pm[1]; }
+  else if (a <= 0x78) d = m68k_read_32(a, 0);
   else d = lastread_d[lrp_mus++&15];
 #ifdef __debug_io
   dprintf("r32_mu: %06x, %08x @%06x", a&0xffffff, d, SekPc);
@@ -653,10 +676,6 @@ PICO_INTERNAL unsigned char z80_read(unsigned short a)
 {
   u8 ret = 0;
 
-#ifndef _USE_DRZ80
-  if (a<0x4000) return Pico.zram[a&0x1fff];
-#endif
-
   if ((a>>13)==2) // 0x4000-0x5fff (Charles MacDonald)
   {
     if (PicoOpt&1) ret = (u8) YM2612Read();
@@ -665,19 +684,20 @@ PICO_INTERNAL unsigned char z80_read(unsigned short a)
 
   if (a>=0x8000)
   {
+    extern u32 PicoReadM68k8(u32 a);
     u32 addr68k;
     addr68k=Pico.m.z80_bank68k<<15;
     addr68k+=a&0x7fff;
 
-    ret = (u8) PicoRead8(addr68k);
+    if (PicoMCD & 1)
+         ret = PicoReadM68k8(addr68k);
+    else ret = PicoRead8(addr68k);
     elprintf(EL_Z80BNK, "z80->68k r8 [%06x] %02x", addr68k, ret);
     return ret;
   }
 
-#ifdef _USE_DRZ80
-  // should not be needed || dprintf("z80_read RAM");
+  // should not be needed, cores should be able to access RAM themselves
   if (a<0x4000) return Pico.zram[a&0x1fff];
-#endif
 
   elprintf(EL_ANOMALY, "z80 invalid r8 [%06x] %02x", a, ret);
   return ret;
@@ -689,10 +709,6 @@ PICO_INTERNAL_ASM void z80_write(unsigned char data, unsigned short a)
 PICO_INTERNAL_ASM void z80_write(unsigned int a, unsigned char data)
 #endif
 {
-#ifndef _USE_DRZ80
-  if (a<0x4000) { Pico.zram[a&0x1fff]=data; return; }
-#endif
-
   if ((a>>13)==2) // 0x4000-0x5fff (Charles MacDonald)
   {
     if(PicoOpt&1) emustatus|=YM2612Write(a, data) & 1;
@@ -715,18 +731,19 @@ PICO_INTERNAL_ASM void z80_write(unsigned int a, unsigned char data)
 
   if (a>=0x8000)
   {
+    extern void PicoWriteM68k8(u32 a,u8 d);
     u32 addr68k;
     addr68k=Pico.m.z80_bank68k<<15;
     addr68k+=a&0x7fff;
     elprintf(EL_Z80BNK, "z80->68k w8 [%06x] %02x", addr68k, data);
-    PicoWrite8(addr68k, data);
+    if (PicoMCD & 1)
+         PicoWriteM68k8(addr68k, data);
+    else PicoWrite8(addr68k, data);
     return;
   }
 
-#ifdef _USE_DRZ80
-  // should not be needed, drZ80 knows how to access RAM itself || dprintf("z80_write RAM @ %08x", lr);
+  // should not be needed
   if (a<0x4000) { Pico.zram[a&0x1fff]=data; return; }
-#endif
 
   elprintf(EL_ANOMALY, "z80 invalid w8 [%06x] %02x", a, data);
 }