+/*
+ * PicoDrive
+ * (C) notaz, 2008
+ *
+ * This work is licensed under the terms of MAME license.
+ * See COPYING file in the top-level directory.
+ */
#include "../pico_int.h"
+#include "../memory.h"
#include "../sound/sn76496.h"
-#ifndef UTYPES_DEFINED
-typedef unsigned char u8;
-typedef unsigned short u16;
-typedef unsigned int u32;
-#define UTYPES_DEFINED
-#endif
-
-
-// -----------------------------------------------------------------
-// Read Rom and read Ram
-
-static u32 PicoReadPico8(u32 a)
+/*
+void dump(u16 w)
{
- u32 d=0;
-
- if ((a&0xe00000)==0xe00000) { d = *(u8 *)(Pico.ram+((a^1)&0xffff)); goto end; } // Ram
- if (a<Pico.romsize) { d = *(u8 *)(Pico.rom+(a^1)); goto end; } // Rom
+ static FILE *f[0x10] = { NULL, };
+ char fname[32];
+ int num = PicoPicohw.r12 & 0xf;
- a&=0xffffff;
+ w = (w << 8) | (w >> 8);
+ sprintf(fname, "ldump%i.bin", num);
+ if (f[num] == NULL)
+ f[num] = fopen(fname, "wb");
+ fwrite(&w, 1, 2, f[num]);
+ //fclose(f);
+}
+*/
- if ((a&0xfffff0)==0xc00000) { // VDP
- d=PicoVideoRead8(a);
- goto end;
- }
+static u32 PicoRead8_pico(u32 a)
+{
+ u32 d = 0;
- if ((a&0xffffe0)==0x800000) // Pico I/O
+ if ((a & 0xffffe0) == 0x800000) // Pico I/O
{
switch (a & 0x1f)
{
case 0x01: d = PicoPicohw.r1; break;
case 0x03:
- d = PicoPad[0]&0x1f; // d-pad
- d |= (PicoPad[0]&0x20) << 2; // pen push -> C
+ d = PicoIn.pad[0]&0x1f; // d-pad
+ d |= (PicoIn.pad[0]&0x20) << 2; // pen push -> C
d = ~d;
break;
case 0x0d: d = (1 << (PicoPicohw.page & 7)) - 1; break;
case 0x12: d = PicoPicohw.fifo_bytes == 0 ? 0x80 : 0; break; // guess
default:
- elprintf(EL_UIO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc);
- break;
+ goto unhandled;
}
+ return d;
}
- //elprintf(EL_UIO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc);
-
-end:
- elprintf(EL_IO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc);
+unhandled:
+ elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc);
return d;
}
-static u32 PicoReadPico16(u32 a)
+static u32 PicoRead16_pico(u32 a)
{
- u32 d=0;
-
- if ((a&0xe00000)==0xe00000) { d=*(u16 *)(Pico.ram+(a&0xfffe)); goto end; } // Ram
-
- a&=0xfffffe;
-
- if (a<Pico.romsize) { d = *(u16 *)(Pico.rom+a); goto end; } // Rom
-
- if ((a&0xfffff0)==0xc00000) {
- d = PicoVideoRead(a);
- goto end;
- }
+ u32 d = 0;
if (a == 0x800010)
d = (PicoPicohw.fifo_bytes > 0x3f) ? 0 : (0x3f - PicoPicohw.fifo_bytes);
else if (a == 0x800012)
d = PicoPicohw.fifo_bytes == 0 ? 0x8000 : 0; // guess
else
- elprintf(EL_UIO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc);
-
- //elprintf(EL_UIO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc);
+ elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc);
-end:
- elprintf(EL_IO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc);
return d;
}
-static u32 PicoReadPico32(u32 a)
-{
- u32 d=0;
-
- if ((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); d = (pm[0]<<16)|pm[1]; goto end; } // Ram
-
- a&=0xfffffe;
-
- if (a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+a); d = (pm[0]<<16)|pm[1]; goto end; } // Rom
-
- if ((a&0xfffff0)==0xc00000) {
- d = (PicoVideoRead(a)<<16)|PicoVideoRead(a+2);
- goto end;
- }
-
- elprintf(EL_UIO, "r32: %06x, %08x @%06x", a&0xffffff, d, SekPc);
-
-end:
- elprintf(EL_IO, "r32: %06x, %08x @%06x", a&0xffffff, d, SekPc);
- return d;
-}
-
-// -----------------------------------------------------------------
-// Write Ram
-/*
-void dump(u16 w)
-{
- static FILE *f[0x10] = { NULL, };
- char fname[32];
- int num = PicoPicohw.r12 & 0xf;
-
- w = (w << 8) | (w >> 8);
- sprintf(fname, "ldump%i.bin", num);
- if (f[num] == NULL)
- f[num] = fopen(fname, "wb");
- fwrite(&w, 1, 2, f[num]);
- //fclose(f);
-}
-*/
-
-static void PicoWritePico8(u32 a,u8 d)
+static void PicoWrite8_pico(u32 a, u32 d)
{
- elprintf(EL_IO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);
-
- if ((a&0xe00000)==0xe00000) { *(u8 *)(Pico.ram+((a^1)&0xffff))=d; return; } // Ram
-
- a&=0xffffff;
- if ((a&0xfffff9)==0xc00011) { if (PicoOpt&2) SN76496Write(d); return; } // PSG Sound
-
- if ((a&0xfffff0)==0xc00000) { // VDP
- d&=0xff;
- PicoVideoWrite(a,(u16)(d|(d<<8))); // Byte access gets mirrored
- return;
- }
-
- switch (a & 0x1f) {
+ switch (a & ~0x800000) {
case 0x19: case 0x1b: case 0x1d: case 0x1f: break; // 'S' 'E' 'G' 'A'
default:
- elprintf(EL_UIO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);
+ elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
break;
}
- //elprintf(EL_UIO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);
}
-static void PicoWritePico16(u32 a,u16 d)
+static void PicoWrite16_pico(u32 a, u32 d)
{
- elprintf(EL_IO, "w16: %06x, %04x", a&0xffffff, d);
-
- if ((a&0xe00000)==0xe00000) { *(u16 *)(Pico.ram+(a&0xfffe))=d; return; } // Ram
-
- a&=0xfffffe;
- if ((a&0xfffff0)==0xc00000) { PicoVideoWrite(a,(u16)d); return; } // VDP
-
//if (a == 0x800010) dump(d);
if (a == 0x800010)
{
PicoReratePico();
}
else
- elprintf(EL_UIO, "w16: %06x, %04x", a&0xffffff, d);
-
- //elprintf(EL_UIO, "w16: %06x, %04x", a&0xffffff, d);
+ elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
}
-static void PicoWritePico32(u32 a,u32 d)
-{
- elprintf(EL_IO, "w32: %06x, %08x", a&0xffffff, d);
-
- if ((a&0xe00000)==0xe00000)
- {
- // Ram:
- u16 *pm=(u16 *)(Pico.ram+(a&0xfffe));
- pm[0]=(u16)(d>>16); pm[1]=(u16)d;
- return;
- }
-
- a&=0xfffffe;
- if ((a&0xfffff0)==0xc00000)
- {
- // VDP:
- PicoVideoWrite(a, (u16)(d>>16));
- PicoVideoWrite(a+2,(u16)d);
- return;
- }
-
- elprintf(EL_UIO, "w32: %06x, %08x", a&0xffffff, d);
-}
-
-#ifdef EMU_M68K
-extern unsigned int (*pm68k_read_memory_8) (unsigned int address);
-extern unsigned int (*pm68k_read_memory_16)(unsigned int address);
-extern unsigned int (*pm68k_read_memory_32)(unsigned int address);
-extern void (*pm68k_write_memory_8) (unsigned int address, unsigned char value);
-extern void (*pm68k_write_memory_16)(unsigned int address, unsigned short value);
-extern void (*pm68k_write_memory_32)(unsigned int address, unsigned int value);
-extern unsigned int (*pm68k_read_memory_pcr_8) (unsigned int address);
-extern unsigned int (*pm68k_read_memory_pcr_16)(unsigned int address);
-extern unsigned int (*pm68k_read_memory_pcr_32)(unsigned int address);
-
-static unsigned int m68k_read_memory_pcrp_8(unsigned int a)
-{
- if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram
- return 0;
-}
-
-static unsigned int m68k_read_memory_pcrp_16(unsigned int a)
-{
- if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram
- return 0;
-}
-
-static unsigned int m68k_read_memory_pcrp_32(unsigned int a)
-{
- if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram
- return 0;
-}
-#endif // EMU_M68K
-
PICO_INTERNAL void PicoMemSetupPico(void)
{
-#ifdef EMU_C68K
- PicoCpuCM68k.checkpc=PicoCheckPc;
- PicoCpuCM68k.fetch8 =PicoCpuCM68k.read8 =PicoReadPico8;
- PicoCpuCM68k.fetch16=PicoCpuCM68k.read16=PicoReadPico16;
- PicoCpuCM68k.fetch32=PicoCpuCM68k.read32=PicoReadPico32;
- PicoCpuCM68k.write8 =PicoWritePico8;
- PicoCpuCM68k.write16=PicoWritePico16;
- PicoCpuCM68k.write32=PicoWritePico32;
-#endif
-#ifdef EMU_M68K
- pm68k_read_memory_8 = PicoReadPico8;
- pm68k_read_memory_16 = PicoReadPico16;
- pm68k_read_memory_32 = PicoReadPico32;
- pm68k_write_memory_8 = PicoWritePico8;
- pm68k_write_memory_16 = PicoWritePico16;
- pm68k_write_memory_32 = PicoWritePico32;
- pm68k_read_memory_pcr_8 = m68k_read_memory_pcrp_8;
- pm68k_read_memory_pcr_16 = m68k_read_memory_pcrp_16;
- pm68k_read_memory_pcr_32 = m68k_read_memory_pcrp_32;
-#endif
-#ifdef EMU_F68K
- // use standard setup, only override handlers
PicoMemSetup();
- PicoCpuFM68k.read_byte =PicoReadPico8;
- PicoCpuFM68k.read_word =PicoReadPico16;
- PicoCpuFM68k.read_long =PicoReadPico32;
- PicoCpuFM68k.write_byte=PicoWritePico8;
- PicoCpuFM68k.write_word=PicoWritePico16;
- PicoCpuFM68k.write_long=PicoWritePico32;
-#endif
+
+ // no MD IO or Z80 on Pico
+ m68k_map_unmap(0x400000, 0xbfffff);
+
+ // map Pico I/O
+ cpu68k_map_set(m68k_read8_map, 0x800000, 0x80ffff, PicoRead8_pico, 1);
+ cpu68k_map_set(m68k_read16_map, 0x800000, 0x80ffff, PicoRead16_pico, 1);
+ cpu68k_map_set(m68k_write8_map, 0x800000, 0x80ffff, PicoWrite8_pico, 1);
+ cpu68k_map_set(m68k_write16_map, 0x800000, 0x80ffff, PicoWrite16_pico, 1);
}
notaz.gp2x.de / picodrive.git / blobdiff