X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=Pico%2FMemory.c;h=ecc34c2549cac42940d419be596e9a046d33977b;hb=9dc09829192f73f5d0502c8b312a39863bca60d3;hp=1e6630da76ba0bb0f743723150418337c0414788;hpb=b542be4686241c9e0722ff8e452980f9ac2b4d7c;p=picodrive.git

diff --git a/Pico/Memory.c b/Pico/Memory.c
index 1e6630d..ecc34c2 100644
--- a/Pico/Memory.c
+++ b/Pico/Memory.c
@@ -141,16 +141,33 @@ static
 u32 SRAMRead(u32 a)
 {
   unsigned int sreg = Pico.m.sram_reg;
-  if(!(sreg & 0x10) && (sreg & 1) && a > 0x200001) { // not yet detected SRAM
+  if (!(sreg & 0x10) && (sreg & 1) && a > 0x200001) { // not yet detected SRAM
     elprintf(EL_SRAMIO, "normal sram detected.");
     Pico.m.sram_reg|=0x10; // should be normal SRAM
   }
-  if(sreg & 4) // EEPROM read
+  if (sreg & 4) // EEPROM read
     return SRAMReadEEPROM();
   else // if(sreg & 1) // (sreg&5) is one of prerequisites
     return *(u8 *)(SRam.data-SRam.start+a);
 }
 
+#ifndef _ASM_MEMORY_C
+static
+#endif
+u32 SRAMRead16(u32 a)
+{
+  u32 d;
+  if (Pico.m.sram_reg & 4) {
+    d = SRAMReadEEPROM();
+    d |= d << 8;
+  } else {
+    u8 *pm=(u8 *)(SRam.data-SRam.start+a);
+    d =*pm++ << 8;
+    d|=*pm++;
+  }
+  return d;
+}
+
 static void SRAMWrite(u32 a, u32 d)
 {
   unsigned int sreg = Pico.m.sram_reg;
@@ -339,7 +356,7 @@ PICO_INTERNAL_ASM u32 PicoRead8(u32 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
@@ -363,8 +380,7 @@ PICO_INTERNAL_ASM u32 PicoRead16(u32 a)
 #ifndef EMU_CORE_DEBUG
   // sram
   if (a >= SRam.start && a <= SRam.end && (Pico.m.sram_reg&5)) {
-    d = SRAMRead(a);
-    d |= d<<8;
+    d = SRAMRead16(a);
     elprintf(EL_SRAMIO, "sram r16 [%06x] %04x @ %06x", a, d, SekPc);
     goto end;
   }
@@ -400,8 +416,7 @@ PICO_INTERNAL_ASM u32 PicoRead32(u32 a)
 
   // sram
   if(a >= SRam.start && a <= SRam.end && (Pico.m.sram_reg&5)) {
-    d = (SRAMRead(a)<<16)|SRAMRead(a+2);
-    d |= d<<8;
+    d = (SRAMRead16(a)<<16)|SRAMRead16(a+2);
     elprintf(EL_SRAMIO, "sram r32 [%06x] %08x @ %06x", a, d, SekPc);
     goto end;
   }
@@ -684,11 +699,14 @@ 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;
   }
@@ -728,11 +746,14 @@ 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;
   }