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https://github.com/RaySollium99/picodrive.git
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initial import
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@2 be3aeb3a-fb24-0410-a615-afba39da0efa
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341 changed files with 180839 additions and 0 deletions
788
Pico/cd/Memory.c
Normal file
788
Pico/cd/Memory.c
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// This is part of Pico Library
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// (c) Copyright 2004 Dave, All rights reserved.
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// (c) Copyright 2006 notaz, All rights reserved.
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// Free for non-commercial use.
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// For commercial use, separate licencing terms must be obtained.
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// A68K no longer supported here
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//#define __debug_io
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#include "../PicoInt.h"
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#include "../sound/sound.h"
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#include "../sound/ym2612.h"
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#include "../sound/sn76496.h"
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typedef unsigned char u8;
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typedef unsigned short u16;
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typedef unsigned int u32;
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//#define __debug_io
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//#define __debug_io2
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// -----------------------------------------------------------------
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extern m68ki_cpu_core m68ki_cpu;
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extern int counter75hz;
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static u32 m68k_reg_read16(u32 a, int realsize)
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{
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u32 d=0;
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a &= 0x3e;
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dprintf("m68k_regs r%2i: [%02x] @%06x", realsize&~1, a+(realsize&1), SekPc);
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switch (a) {
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case 2:
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d = (Pico_mcd->m68k_regs[a]<<8) | Pico_mcd->m68k_regs[a+1] | 1; // for now 2M to m68k
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goto end;
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case 8:
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dprintf("m68k host data read");
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d = Read_CDC_Host(0);
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goto end;
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case 0xC:
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dprintf("m68k stopwatch read");
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break;
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}
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if (a < 0xE) {
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d = (Pico_mcd->m68k_regs[a]<<8) | Pico_mcd->m68k_regs[a+1];
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goto end;
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}
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if (a < 0x30) {
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// comm flag/cmd/status (0xE-0x2F)
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d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];
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goto end;
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}
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dprintf("m68k_regs invalid read @ %02x", a);
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end:
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dprintf("ret = %04x", d);
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return d;
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}
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static void m68k_reg_write8(u32 a, u32 d, int realsize)
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{
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a &= 0x3f;
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dprintf("m68k_regs w%2i: [%02x] %02x @%06x", realsize, a, d, SekPc);
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switch (a) {
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case 0:
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if ((d&1) && (Pico_mcd->s68k_regs[0x33]&(1<<2))) { dprintf("m68k: s68k irq 2"); SekInterruptS68k(2); }
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break;
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case 1:
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if (!(d&1)) PicoMCD |= 2; // reset pending, needed to be sure we fetch the right vectors on reset
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if ( (Pico_mcd->m68k_regs[1]&1) != (d&1)) dprintf("m68k: s68k reset %i", !(d&1));
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if ( (Pico_mcd->m68k_regs[1]&2) != (d&2)) dprintf("m68k: s68k brq %i", (d&2)>>1);
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if (/*!(Pico_mcd->m68k_regs[1]&1) &&*/ (PicoMCD&2) && (d&3)==1) {
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SekResetS68k(); // S68k comes out of RESET or BRQ state
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PicoMCD&=~2;
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dprintf("m68k: resetting s68k");
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}
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break;
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case 3:
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if ((Pico_mcd->m68k_regs[3]>>6) != ((d>>6)&3))
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dprintf("m68k: prg bank: %i -> %i", (Pico_mcd->m68k_regs[a]>>6), ((d>>6)&3));
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if ((Pico_mcd->m68k_regs[3]&4) != (d&4)) dprintf("m68k: ram mode %i mbit", (d&4) ? 1 : 2);
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if ((Pico_mcd->m68k_regs[3]&2) != (d&2)) dprintf("m68k: %s", (d&4) ? ((d&2) ? "word swap req" : "noop?") :
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((d&2) ? "word ram to s68k" : "word ram to m68k"));
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break;
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case 0xe:
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dprintf("m68k: comm flag: %02x", d);
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dprintf("s68k @ %06x", SekPcS68k);
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Pico_mcd->s68k_regs[0xe] = d;
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break;
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}
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if ((a&0xff) == 0x10) {
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Pico_mcd->s68k_regs[a] = d;
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}
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if (a >= 0x20 || (a >= 0xa && a <= 0xd) || a == 0x0f)
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dprintf("m68k: invalid write?");
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if (a < 0x10)
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Pico_mcd->m68k_regs[a] = (u8) d;
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}
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static u32 s68k_reg_read16(u32 a, int realsize)
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{
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u32 d=0;
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a &= 0x1fe;
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dprintf("s68k_regs r%2i: [%02x] @ %06x", realsize&~1, a+(realsize&1), SekPcS68k);
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switch (a) {
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case 0:
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d = 1; goto end; // ver = 0, not in reset state
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case 6:
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d = CDC_Read_Reg();
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goto end;
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case 8:
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dprintf("s68k host data read");
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d = Read_CDC_Host(1);
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goto end;
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case 0xC:
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dprintf("s68k stopwatch read");
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break;
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case 0x34: // fader
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d = 0; // no busy bit
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goto end;
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}
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d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];
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end:
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dprintf("ret = %04x", d);
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return d;
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}
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static void s68k_reg_write8(u32 a, u32 d, int realsize)
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{
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a &= 0x1ff;
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dprintf("s68k_regs w%2i: [%02x] %02x @ %06x", realsize, a, d, SekPcS68k);
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// TODO: review against Gens
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switch (a) {
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case 4:
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dprintf("s68k CDC dest: %x", d&7);
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Pico_mcd->s68k_regs[4] = (Pico_mcd->s68k_regs[4]&0xC0) | (d&7); // CDC mode
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return;
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case 5:
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dprintf("s68k CDC reg addr: %x", d&0xf);
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break;
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case 7:
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CDC_Write_Reg(d);
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return;
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case 0xa:
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dprintf("s68k set CDC dma addr");
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break;
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case 0x33: // IRQ mask
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dprintf("s68k irq mask: %02x", d);
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if ((d&(1<<4)) && (Pico_mcd->s68k_regs[0x37]&4) && !(Pico_mcd->s68k_regs[0x33]&(1<<4))) {
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CDD_Export_Status();
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// counter75hz = 0; // ???
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}
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break;
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case 0x34: // fader
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Pico_mcd->s68k_regs[a] = (u8) d & 0x7f;
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return;
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case 0x37:
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if ((d&4) && !(Pico_mcd->s68k_regs[0x37]&4)) {
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CDD_Export_Status();
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// counter75hz = 0; // ???
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}
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break;
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case 0x4b:
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Pico_mcd->s68k_regs[a] = (u8) d;
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CDD_Import_Command();
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return;
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}
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if ((a&0x1f0) == 0x10 || a == 0x0e || (a >= 0x38 && a < 0x42))
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{
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dprintf("m68k: invalid write @ %02x?", a);
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return;
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}
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Pico_mcd->s68k_regs[a] = (u8) d;
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}
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static int PadRead(int i)
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{
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int pad=0,value=0,TH;
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pad=~PicoPad[i]; // Get inverse of pad MXYZ SACB RLDU
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TH=Pico.ioports[i+1]&0x40;
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if(PicoOpt & 0x20) { // 6 button gamepad enabled
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int phase = Pico.m.padTHPhase[i];
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if(phase == 2 && !TH) {
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value=(pad&0xc0)>>2; // ?0SA 0000
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goto end;
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} else if(phase == 3 && TH) {
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value=(pad&0x30)|((pad>>8)&0xf); // ?1CB MXYZ
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goto end;
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} else if(phase == 3 && !TH) {
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value=((pad&0xc0)>>2)|0x0f; // ?0SA 1111
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goto end;
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}
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}
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if(TH) value=(pad&0x3f); // ?1CB RLDU
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else value=((pad&0xc0)>>2)|(pad&3); // ?0SA 00DU
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end:
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// orr the bits, which are set as output
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value |= Pico.ioports[i+1]&Pico.ioports[i+4];
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return value; // will mirror later
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}
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static u8 z80Read8(u32 a)
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{
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if(Pico.m.z80Run&1) return 0;
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a&=0x1fff;
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if(!(PicoOpt&4)) {
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// Z80 disabled, do some faking
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static u8 zerosent = 0;
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if(a == Pico.m.z80_lastaddr) { // probably polling something
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u8 d = Pico.m.z80_fakeval;
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if((d & 0xf) == 0xf && !zerosent) {
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d = 0; zerosent = 1;
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} else {
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Pico.m.z80_fakeval++;
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zerosent = 0;
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}
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return d;
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} else {
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Pico.m.z80_fakeval = 0;
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}
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}
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Pico.m.z80_lastaddr = (u16) a;
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return Pico.zram[a];
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}
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// for nonstandard reads
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static u32 UnusualRead16(u32 a, int realsize)
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{
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u32 d=0;
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dprintf("unusual r%i: %06x @%06x", realsize&~1, (a&0xfffffe)+(realsize&1), SekPc);
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dprintf("ret = %04x", d);
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return d;
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}
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static u32 OtherRead16(u32 a, int realsize)
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{
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u32 d=0;
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if ((a&0xff0000)==0xa00000) {
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if ((a&0x4000)==0x0000) { d=z80Read8(a); d|=d<<8; goto end; } // Z80 ram (not byteswaped)
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if ((a&0x6000)==0x4000) { if(PicoOpt&1) d=YM2612Read(); else d=Pico.m.rotate++&3; goto end; } // 0x4000-0x5fff, Fudge if disabled
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d=0xffff; goto end;
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}
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if ((a&0xffffe0)==0xa10000) { // I/O ports
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a=(a>>1)&0xf;
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switch(a) {
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case 0: d=Pico.m.hardware; break; // Hardware value (Version register)
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case 1: d=PadRead(0); d|=Pico.ioports[1]&0x80; break;
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case 2: d=PadRead(1); d|=Pico.ioports[2]&0x80; break;
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default: d=Pico.ioports[a]; break; // IO ports can be used as RAM
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}
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d|=d<<8;
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goto end;
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}
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// |=0x80 for Shadow of the Beast & Super Offroad; rotate fakes next fetched instruction for Time Killers
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if (a==0xa11100) { d=((Pico.m.z80Run&1)<<8)|0x8000|Pico.m.rotate++; goto end; }
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if ((a&0xe700e0)==0xc00000) { d=PicoVideoRead(a); goto end; }
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if ((a&0xffffc0)==0xa12000) { d=m68k_reg_read16(a, realsize); goto end; }
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d = UnusualRead16(a, realsize);
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end:
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return d;
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}
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//extern UINT32 mz80GetRegisterValue(void *, UINT32);
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static void OtherWrite8(u32 a,u32 d,int realsize)
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{
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if ((a&0xe700f9)==0xc00011||(a&0xff7ff9)==0xa07f11) { if(PicoOpt&2) SN76496Write(d); return; } // PSG Sound
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if ((a&0xff4000)==0xa00000) { if(!(Pico.m.z80Run&1)) Pico.zram[a&0x1fff]=(u8)d; return; } // Z80 ram
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if ((a&0xff6000)==0xa04000) { if(PicoOpt&1) emustatus|=YM2612Write(a&3, d); return; } // FM Sound
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if ((a&0xffffe0)==0xa10000) { // I/O ports
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a=(a>>1)&0xf;
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// 6 button gamepad: if TH went from 0 to 1, gamepad changes state
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if(PicoOpt&0x20) {
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if(a==1) {
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Pico.m.padDelay[0] = 0;
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if(!(Pico.ioports[1]&0x40) && (d&0x40)) Pico.m.padTHPhase[0]++;
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}
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else if(a==2) {
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Pico.m.padDelay[1] = 0;
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if(!(Pico.ioports[2]&0x40) && (d&0x40)) Pico.m.padTHPhase[1]++;
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}
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}
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Pico.ioports[a]=(u8)d; // IO ports can be used as RAM
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return;
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}
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if (a==0xa11100) {
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extern int z80startCycle, z80stopCycle;
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//int lineCycles=(488-SekCyclesLeft)&0x1ff;
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d&=1; d^=1;
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if(!d) {
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// hack: detect a nasty situation where Z80 was enabled and disabled in the same 68k timeslice (Golden Axe III)
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if((PicoOpt&4) && Pico.m.z80Run==1) z80_run(20);
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z80stopCycle = SekCyclesDone();
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//z80ExtraCycles += (lineCycles>>1)-(lineCycles>>5); // only meaningful in PicoFrameHints()
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} else {
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z80startCycle = SekCyclesDone();
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//if(Pico.m.scanline != -1)
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//z80ExtraCycles -= (lineCycles>>1)-(lineCycles>>5)+16;
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}
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//dprintf("set_zrun: %i [%i|%i] zPC=%04x @%06x", d, Pico.m.scanline, SekCyclesDone(), mz80GetRegisterValue(NULL, 0), SekPc);
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Pico.m.z80Run=(u8)d; return;
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}
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if (a==0xa11200) { if(!(d&1)) z80_reset(); return; }
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if ((a&0xff7f00)==0xa06000) // Z80 BANK register
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{
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Pico.m.z80_bank68k>>=1;
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Pico.m.z80_bank68k|=(d&1)<<8;
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Pico.m.z80_bank68k&=0x1ff; // 9 bits and filled in the new top one
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return;
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||||
}
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||||
|
||||
if ((a&0xe700e0)==0xc00000) { PicoVideoWrite(a,(u16)(d|(d<<8))); return; } // Byte access gets mirrored
|
||||
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||||
if ((a&0xffffc0)==0xa12000) { m68k_reg_write8(a, d, realsize); return; }
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||||
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dprintf("strange w%i: %06x, %08x @%06x", realsize, a&0xffffff, d, SekPc);
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||||
}
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||||
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static void OtherWrite16(u32 a,u32 d)
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||||
{
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||||
if ((a&0xe700e0)==0xc00000) { PicoVideoWrite(a,(u16)d); return; }
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if ((a&0xff4000)==0xa00000) { if(!(Pico.m.z80Run&1)) Pico.zram[a&0x1fff]=(u8)(d>>8); return; } // Z80 ram (MSB only)
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||||
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||||
if ((a&0xffffe0)==0xa10000) { // I/O ports
|
||||
a=(a>>1)&0xf;
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||||
// 6 button gamepad: if TH went from 0 to 1, gamepad changes state
|
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if(PicoOpt&0x20) {
|
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if(a==1) {
|
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Pico.m.padDelay[0] = 0;
|
||||
if(!(Pico.ioports[1]&0x40) && (d&0x40)) Pico.m.padTHPhase[0]++;
|
||||
}
|
||||
else if(a==2) {
|
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Pico.m.padDelay[1] = 0;
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||||
if(!(Pico.ioports[2]&0x40) && (d&0x40)) Pico.m.padTHPhase[1]++;
|
||||
}
|
||||
}
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||||
Pico.ioports[a]=(u8)d; // IO ports can be used as RAM
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||||
return;
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}
|
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if (a==0xa11100) { OtherWrite8(a, d>>8, 16); return; }
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||||
if (a==0xa11200) { if(!(d&0x100)) z80_reset(); return; }
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||||
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OtherWrite8(a, d>>8, 16);
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OtherWrite8(a+1,d&0xff, 16);
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||||
}
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||||
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||||
// -----------------------------------------------------------------
|
||||
// Read Rom and read Ram
|
||||
|
||||
u8 PicoReadM68k8(u32 a)
|
||||
{
|
||||
u32 d=0;
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|
||||
if ((a&0xe00000)==0xe00000) { d = *(u8 *)(Pico.ram+((a^1)&0xffff)); goto end; } // Ram
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|
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a&=0xffffff;
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||||
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||||
if (a < 0x20000) { d = *(u8 *)(Pico_mcd->bios+(a^1)); goto end; } // bios
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||||
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||||
// prg RAM
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||||
if ((a&0xfe0000)==0x020000) {
|
||||
u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->m68k_regs[3]>>6];
|
||||
d = *(prg_bank+((a^1)&0x1ffff));
|
||||
goto end;
|
||||
}
|
||||
|
||||
if ((a&0xff4000)==0xa00000) { d=z80Read8(a); goto end; } // Z80 Ram
|
||||
|
||||
d=OtherRead16(a&~1, 8|(a&1)); if ((a&1)==0) d>>=8;
|
||||
|
||||
end:
|
||||
|
||||
#ifdef __debug_io
|
||||
dprintf("r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc);
|
||||
#endif
|
||||
return (u8)d;
|
||||
}
|
||||
|
||||
u16 PicoReadM68k16(u32 a)
|
||||
{
|
||||
u16 d=0;
|
||||
|
||||
if ((a&0xe00000)==0xe00000) { d=*(u16 *)(Pico.ram+(a&0xfffe)); goto end; } // Ram
|
||||
|
||||
a&=0xfffffe;
|
||||
|
||||
if (a < 0x20000) { d = *(u16 *)(Pico_mcd->bios+a); goto end; } // bios
|
||||
|
||||
// prg RAM
|
||||
if ((a&0xfe0000)==0x020000) {
|
||||
u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->m68k_regs[3]>>6];
|
||||
d = *(u16 *)(prg_bank+(a&0x1fffe));
|
||||
goto end;
|
||||
}
|
||||
|
||||
d = (u16)OtherRead16(a, 16);
|
||||
|
||||
end:
|
||||
|
||||
#ifdef __debug_io
|
||||
dprintf("r16: %06x, %04x @%06x", a&0xffffff, d, SekPc);
|
||||
#endif
|
||||
return d;
|
||||
}
|
||||
|
||||
u32 PicoReadM68k32(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 < 0x20000) { u16 *pm=(u16 *)(Pico_mcd->bios+a); d = (pm[0]<<16)|pm[1]; goto end; } // bios
|
||||
|
||||
// prg RAM
|
||||
if ((a&0xfe0000)==0x020000) {
|
||||
u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->m68k_regs[3]>>6];
|
||||
u16 *pm=(u16 *)(prg_bank+(a&0x1fffe));
|
||||
d = (pm[0]<<16)|pm[1];
|
||||
goto end;
|
||||
}
|
||||
|
||||
d = (OtherRead16(a, 32)<<16)|OtherRead16(a+2, 32);
|
||||
|
||||
end:
|
||||
#ifdef __debug_io
|
||||
dprintf("r32: %06x, %08x @%06x", a&0xffffff, d, SekPc);
|
||||
#endif
|
||||
return d;
|
||||
}
|
||||
|
||||
// -----------------------------------------------------------------
|
||||
// Write Ram
|
||||
|
||||
void PicoWriteM68k8(u32 a,u8 d)
|
||||
{
|
||||
#ifdef __debug_io
|
||||
dprintf("w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);
|
||||
#endif
|
||||
//if ((a&0xe0ffff)==0xe0a9ba+0x69c)
|
||||
// dprintf("w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);
|
||||
|
||||
|
||||
if ((a&0xe00000)==0xe00000) { u8 *pm=(u8 *)(Pico.ram+((a^1)&0xffff)); pm[0]=d; return; } // Ram
|
||||
|
||||
a&=0xffffff;
|
||||
|
||||
// prg RAM
|
||||
if ((a&0xfe0000)==0x020000) {
|
||||
u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->m68k_regs[3]>>6];
|
||||
u8 *pm=(u8 *)(prg_bank+((a^1)&0x1ffff));
|
||||
*pm=d;
|
||||
return;
|
||||
}
|
||||
|
||||
OtherWrite8(a,d,8);
|
||||
}
|
||||
|
||||
void PicoWriteM68k16(u32 a,u16 d)
|
||||
{
|
||||
#ifdef __debug_io
|
||||
dprintf("w16: %06x, %04x", a&0xffffff, d);
|
||||
#endif
|
||||
//if ((a&0xe0ffff)==0xe0AF0E+0x69c||(a&0xe0ffff)==0xe0A9A8+0x69c||(a&0xe0ffff)==0xe0A9AA+0x69c||(a&0xe0ffff)==0xe0A9AC+0x69c)
|
||||
// dprintf("w16: %06x, %04x @%06x", a&0xffffff, d, SekPc);
|
||||
|
||||
if ((a&0xe00000)==0xe00000) { *(u16 *)(Pico.ram+(a&0xfffe))=d; return; } // Ram
|
||||
|
||||
a&=0xfffffe;
|
||||
|
||||
// prg RAM
|
||||
if ((a&0xfe0000)==0x020000) {
|
||||
u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->m68k_regs[3]>>6];
|
||||
*(u16 *)(prg_bank+(a&0x1fffe))=d;
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
OtherWrite16(a,d);
|
||||
}
|
||||
|
||||
void PicoWriteM68k32(u32 a,u32 d)
|
||||
{
|
||||
#ifdef __debug_io
|
||||
dprintf("w32: %06x, %08x", a&0xffffff, d);
|
||||
#endif
|
||||
|
||||
if ((a&0xe00000)==0xe00000)
|
||||
{
|
||||
// Ram:
|
||||
u16 *pm=(u16 *)(Pico.ram+(a&0xfffe));
|
||||
pm[0]=(u16)(d>>16); pm[1]=(u16)d;
|
||||
return;
|
||||
}
|
||||
|
||||
a&=0xfffffe;
|
||||
|
||||
// prg RAM
|
||||
if ((a&0xfe0000)==0x020000) {
|
||||
u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->m68k_regs[3]>>6];
|
||||
u16 *pm=(u16 *)(prg_bank+(a&0x1fffe));
|
||||
pm[0]=(u16)(d>>16); pm[1]=(u16)d;
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
OtherWrite16(a, (u16)(d>>16));
|
||||
OtherWrite16(a+2,(u16)d);
|
||||
}
|
||||
|
||||
|
||||
// -----------------------------------------------------------------
|
||||
|
||||
|
||||
u8 PicoReadS68k8(u32 a)
|
||||
{
|
||||
u32 d=0;
|
||||
|
||||
a&=0xffffff;
|
||||
|
||||
// prg RAM
|
||||
if (a < 0x80000) {
|
||||
d = *(Pico_mcd->prg_ram+(a^1));
|
||||
goto end;
|
||||
}
|
||||
|
||||
// regs
|
||||
if ((a&0xfffe00) == 0xff8000) {
|
||||
d = s68k_reg_read16(a&~1, 8|(a&1)); if ((a&1)==0) d>>=8;
|
||||
goto end;
|
||||
}
|
||||
|
||||
dprintf("s68k r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPcS68k);
|
||||
|
||||
end:
|
||||
|
||||
#ifdef __debug_io2
|
||||
dprintf("s68k r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPcS68k);
|
||||
#endif
|
||||
return (u8)d;
|
||||
}
|
||||
|
||||
u16 PicoReadS68k16(u32 a)
|
||||
{
|
||||
u16 d=0;
|
||||
|
||||
a&=0xfffffe;
|
||||
|
||||
// prg RAM
|
||||
if (a < 0x80000) {
|
||||
d = *(u16 *)(Pico_mcd->prg_ram+a);
|
||||
goto end;
|
||||
}
|
||||
|
||||
// regs
|
||||
if ((a&0xfffe00) == 0xff8000) {
|
||||
d = s68k_reg_read16(a, 16);
|
||||
goto end;
|
||||
}
|
||||
|
||||
dprintf("s68k r16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);
|
||||
|
||||
end:
|
||||
|
||||
#ifdef __debug_io2
|
||||
dprintf("s68k r16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);
|
||||
#endif
|
||||
return d;
|
||||
}
|
||||
|
||||
u32 PicoReadS68k32(u32 a)
|
||||
{
|
||||
u32 d=0;
|
||||
|
||||
a&=0xfffffe;
|
||||
|
||||
// prg RAM
|
||||
if (a < 0x80000) {
|
||||
u16 *pm=(u16 *)(Pico_mcd->prg_ram+a);
|
||||
d = (pm[0]<<16)|pm[1];
|
||||
goto end;
|
||||
}
|
||||
|
||||
// regs
|
||||
if ((a&0xfffe00) == 0xff8000) {
|
||||
d = (s68k_reg_read16(a, 32)<<16)|s68k_reg_read16(a+2, 32);
|
||||
goto end;
|
||||
}
|
||||
|
||||
dprintf("s68k r32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);
|
||||
|
||||
end:
|
||||
|
||||
#ifdef __debug_io2
|
||||
dprintf("s68k r32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);
|
||||
#endif
|
||||
return d;
|
||||
}
|
||||
|
||||
// -----------------------------------------------------------------
|
||||
|
||||
void PicoWriteS68k8(u32 a,u8 d)
|
||||
{
|
||||
#ifdef __debug_io2
|
||||
dprintf("s68k w8 : %06x, %02x @%06x", a&0xffffff, d, SekPcS68k);
|
||||
#endif
|
||||
|
||||
a&=0xffffff;
|
||||
|
||||
// prg RAM
|
||||
if (a < 0x80000) {
|
||||
u8 *pm=(u8 *)(Pico_mcd->prg_ram+(a^1));
|
||||
*pm=d;
|
||||
return;
|
||||
}
|
||||
|
||||
// regs
|
||||
if ((a&0xfffe00) == 0xff8000) {
|
||||
s68k_reg_write8(a,d,8);
|
||||
return;
|
||||
}
|
||||
|
||||
dprintf("s68k w8 : %06x, %02x @%06x", a&0xffffff, d, SekPcS68k);
|
||||
}
|
||||
|
||||
void PicoWriteS68k16(u32 a,u16 d)
|
||||
{
|
||||
#ifdef __debug_io2
|
||||
dprintf("s68k w16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);
|
||||
#endif
|
||||
|
||||
a&=0xfffffe;
|
||||
|
||||
// prg RAM
|
||||
if (a < 0x80000) {
|
||||
*(u16 *)(Pico_mcd->prg_ram+a)=d;
|
||||
return;
|
||||
}
|
||||
|
||||
// regs
|
||||
if ((a&0xfffe00) == 0xff8000) {
|
||||
s68k_reg_write8(a, d>>8, 16);
|
||||
s68k_reg_write8(a+1,d&0xff, 16);
|
||||
return;
|
||||
}
|
||||
|
||||
dprintf("s68k w16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);
|
||||
}
|
||||
|
||||
void PicoWriteS68k32(u32 a,u32 d)
|
||||
{
|
||||
#ifdef __debug_io2
|
||||
dprintf("s68k w32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);
|
||||
#endif
|
||||
|
||||
a&=0xfffffe;
|
||||
|
||||
// prg RAM
|
||||
if (a < 0x80000) {
|
||||
u16 *pm=(u16 *)(Pico_mcd->prg_ram+a);
|
||||
pm[0]=(u16)(d>>16); pm[1]=(u16)d;
|
||||
return;
|
||||
}
|
||||
|
||||
// regs
|
||||
if ((a&0xfffe00) == 0xff8000) {
|
||||
s68k_reg_write8(a, d>>24, 32);
|
||||
s68k_reg_write8(a+1,(d>>16)&0xff, 32);
|
||||
s68k_reg_write8(a+2,(d>>8) &0xff, 32);
|
||||
s68k_reg_write8(a+3, d &0xff, 32);
|
||||
return;
|
||||
}
|
||||
|
||||
dprintf("s68k w32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);
|
||||
}
|
||||
|
||||
|
||||
|
||||
// -----------------------------------------------------------------
|
||||
|
||||
#ifdef EMU_M68K
|
||||
unsigned char PicoReadCD8w (unsigned int a) {
|
||||
return m68ki_cpu_p == &PicoS68kCPU ? PicoReadS68k8(a) : PicoReadM68k8(a);
|
||||
}
|
||||
unsigned short PicoReadCD16w(unsigned int a) {
|
||||
return m68ki_cpu_p == &PicoS68kCPU ? PicoReadS68k16(a) : PicoReadM68k16(a);
|
||||
}
|
||||
unsigned int PicoReadCD32w(unsigned int a) {
|
||||
return m68ki_cpu_p == &PicoS68kCPU ? PicoReadS68k32(a) : PicoReadM68k32(a);
|
||||
}
|
||||
void PicoWriteCD8w (unsigned int a, unsigned char d) {
|
||||
if (m68ki_cpu_p == &PicoS68kCPU) PicoWriteS68k8(a, d); else PicoWriteM68k8(a, d);
|
||||
}
|
||||
void PicoWriteCD16w(unsigned int a, unsigned short d) {
|
||||
if (m68ki_cpu_p == &PicoS68kCPU) PicoWriteS68k16(a, d); else PicoWriteM68k16(a, d);
|
||||
}
|
||||
void PicoWriteCD32w(unsigned int a, unsigned int d) {
|
||||
if (m68ki_cpu_p == &PicoS68kCPU) PicoWriteS68k32(a, d); else PicoWriteM68k32(a, d);
|
||||
}
|
||||
|
||||
// these are allowed to access RAM
|
||||
unsigned int m68k_read_pcrelative_CD8 (unsigned int a) {
|
||||
a&=0xffffff;
|
||||
if(m68ki_cpu_p == &PicoS68kCPU) {
|
||||
if (a < 0x80000) return *(u8 *)(Pico_mcd->prg_ram+(a^1)); // PRG Ram
|
||||
else dprintf("s68k read_pcrel8 @ %06x", a);
|
||||
} else {
|
||||
if(a<Pico.romsize) return *(u8 *)(Pico.rom+(a^1)); // Rom
|
||||
if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram
|
||||
}
|
||||
return 0;//(u8) lastread_d;
|
||||
}
|
||||
unsigned int m68k_read_pcrelative_CD16(unsigned int a) {
|
||||
a&=0xffffff;
|
||||
if(m68ki_cpu_p == &PicoS68kCPU) {
|
||||
if (a < 0x80000) return *(u16 *)(Pico_mcd->prg_ram+(a&~1)); // PRG Ram
|
||||
else dprintf("s68k read_pcrel16 @ %06x", a);
|
||||
} else {
|
||||
if(a<Pico.romsize) return *(u16 *)(Pico.rom+(a&~1)); // Rom
|
||||
if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram
|
||||
}
|
||||
return 0;//(u16) lastread_d;
|
||||
}
|
||||
unsigned int m68k_read_pcrelative_CD32(unsigned int a) {
|
||||
a&=0xffffff;
|
||||
if(m68ki_cpu_p == &PicoS68kCPU) {
|
||||
if (a < 0x80000) { u16 *pm=(u16 *)(Pico_mcd->prg_ram+(a&~1)); return (pm[0]<<16)|pm[1]; } // PRG Ram
|
||||
else dprintf("s68k read_pcrel32 @ %06x", a);
|
||||
} else {
|
||||
if(a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+(a&~1)); return (pm[0]<<16)|pm[1]; }
|
||||
if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram
|
||||
}
|
||||
return 0; //lastread_d;
|
||||
}
|
||||
#endif // EMU_M68K
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue