--- /dev/null
+#include "../pico_int.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)
+{
+ 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
+
+ a&=0xffffff;
+
+ if ((a&0xfffff0)==0xc00000) { // VDP
+ d=PicoVideoRead8(a);
+ goto end;
+ }
+
+ 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 = ~d;
+ break;
+
+ case 0x05: d = (PicoPicohw.pen_pos[0] >> 8); break; // what is MS bit for? Games read it..
+ case 0x07: d = PicoPicohw.pen_pos[0] & 0xff; break;
+ case 0x09: d = (PicoPicohw.pen_pos[1] >> 8); break;
+ case 0x0b: d = PicoPicohw.pen_pos[1] & 0xff; 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;
+ }
+ }
+
+ //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);
+ return d;
+}
+
+static u32 PicoReadPico16(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;
+ }
+
+ 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);
+
+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)
+{
+ 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) {
+ 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);
+ break;
+ }
+ //elprintf(EL_UIO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);
+}
+
+static void PicoWritePico16(u32 a,u16 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)
+ {
+ PicoPicohw.fifo_bytes += 2;
+
+ if (PicoPicohw.xpcm_ptr < PicoPicohw.xpcm_buffer + XPCM_BUFFER_SIZE) {
+ *PicoPicohw.xpcm_ptr++ = d >> 8;
+ *PicoPicohw.xpcm_ptr++ = d;
+ }
+ else if (PicoPicohw.xpcm_ptr == PicoPicohw.xpcm_buffer + XPCM_BUFFER_SIZE) {
+ elprintf(EL_ANOMALY|EL_PICOHW, "xpcm_buffer overflow!");
+ PicoPicohw.xpcm_ptr++;
+ }
+ }
+ else if (a == 0x800012) {
+ int r12_old = PicoPicohw.r12;
+ PicoPicohw.r12 = d;
+ if (r12_old != d)
+ PicoReratePico();
+ }
+ else
+ elprintf(EL_UIO, "w16: %06x, %04x", a&0xffffff, d);
+
+ //elprintf(EL_UIO, "w16: %06x, %04x", a&0xffffff, d);
+}
+
+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
+}
+
notaz.gp2x.de / picodrive.git / blobdiff