mirror of
https://github.com/RaySollium99/picodrive.git
synced 2025-09-05 15:27:46 -04:00
bugfixes, cd/Memory.s
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@70 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz
parent
66fdc0f0d5
commit
4ff2d52753
14 changed files with 2043 additions and 124 deletions
199
Pico/cd/Memory.c
199
Pico/cd/Memory.c
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@ -19,8 +19,6 @@
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#include "gfx_cd.h"
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#include "pcm.h"
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#include "cell_map.c"
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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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@ -36,6 +34,13 @@ typedef unsigned int u32;
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// -----------------------------------------------------------------
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#ifndef _ASM_CD_MEMORY_C
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void PicoMemResetCD(int r3)
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{
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}
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#endif
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#ifndef _ASM_CD_MEMORY_C
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static u32 m68k_reg_read16(u32 a)
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{
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u32 d=0;
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@ -63,8 +68,8 @@ static u32 m68k_reg_read16(u32 a)
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dprintf("m68k FIXME: reserved read");
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goto end;
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case 0xC:
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dprintf("m68k stopwatch timer read");
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d = Pico_mcd->m.timer_stopwatch >> 16;
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dprintf("m68k stopwatch timer read (%04x)", d);
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goto end;
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}
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@ -81,8 +86,12 @@ end:
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// dprintf("ret = %04x", d);
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return d;
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}
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#endif
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static void m68k_reg_write8(u32 a, u32 d)
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#ifndef _ASM_CD_MEMORY_C
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static
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#endif
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void m68k_reg_write8(u32 a, u32 d)
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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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@ -99,8 +108,8 @@ static void m68k_reg_write8(u32 a, u32 d)
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if ( (Pico_mcd->m.busreq&2) != (d&2)) dprintf("m68k: s68k brq %i", (d&2)>>1);
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if ((Pico_mcd->m.state_flags&1) && (d&3)==1) {
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SekResetS68k(); // S68k comes out of RESET or BRQ state
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Pico_mcd->m.state_flags&=~1;
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dprintf("m68k: resetting s68k, cycles=%i", SekCyclesLeft);
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Pico_mcd->m.state_flags&=~1;
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dprintf("m68k: resetting s68k, cycles=%i", SekCyclesLeft);
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}
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Pico_mcd->m.busreq = d;
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return;
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@ -164,7 +173,10 @@ static void m68k_reg_write8(u32 a, u32 d)
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}
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static u32 s68k_reg_read16(u32 a)
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#ifndef _ASM_CD_MEMORY_C
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static
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#endif
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u32 s68k_reg_read16(u32 a)
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{
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u32 d=0;
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@ -176,7 +188,7 @@ static u32 s68k_reg_read16(u32 a)
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goto end;
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case 2:
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d = (Pico_mcd->s68k_regs[a]<<8) | (Pico_mcd->s68k_regs[a+1]&0x1f);
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dprintf("s68k_regs r3: %02x @%06x", (u8)d, SekPc);
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dprintf("s68k_regs r3: %02x @%06x", (u8)d, SekPcS68k);
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goto end;
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case 6:
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d = CDC_Read_Reg();
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@ -185,11 +197,11 @@ static u32 s68k_reg_read16(u32 a)
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d = Read_CDC_Host(1); // Gens returns 0 here on byte reads
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goto end;
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case 0xC:
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dprintf("s68k stopwatch timer read");
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d = Pico_mcd->m.timer_stopwatch >> 16;
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dprintf("s68k stopwatch timer read (%04x)", d);
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goto end;
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case 0x30:
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dprintf("s68k int3 timer read");
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dprintf("s68k int3 timer read (%02x%02x)", Pico_mcd->s68k_regs[30], Pico_mcd->s68k_regs[31]);
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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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@ -217,7 +229,10 @@ end:
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return d;
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}
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static void s68k_reg_write8(u32 a, u32 d)
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#ifndef _ASM_CD_MEMORY_C
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static
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#endif
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void s68k_reg_write8(u32 a, u32 d)
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{
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//dprintf("s68k_regs w%2i: [%02x] %02x @ %06x", realsize, a, d, SekPcS68k);
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@ -229,20 +244,33 @@ static void s68k_reg_write8(u32 a, u32 d)
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int dold = Pico_mcd->s68k_regs[3];
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dprintf("s68k_regs w3: %02x @%06x", (u8)d, SekPc);
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d &= 0x1d;
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d |= dold&0xc2;
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if (d&4) {
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d |= dold&0xc2;
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if ((d ^ dold) & 5) d &= ~2; // in case of mode or bank change we clear DMNA (m68k req) bit
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if ((d ^ dold) & 5) {
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d &= ~2; // in case of mode or bank change we clear DMNA (m68k req) bit
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#ifdef _ASM_CD_MEMORY_C
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PicoMemResetCD(d);
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#endif
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}
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if (!(dold & 4)) {
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dprintf("wram mode 2M->1M");
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wram_2M_to_1M(Pico_mcd->word_ram2M);
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}
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}
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} else {
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d |= Pico_mcd->s68k_regs[3]&0xc3;
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if (d&1) d &= ~2; // return word RAM to m68k in 2M mode
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if (dold & 4) {
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dprintf("wram mode 1M->2M");
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if (!(d&1)) { // it didn't set the ret bit, which means it doesn't want to give WRAM to m68k
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d &= ~3;
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d |= (dold&1) ? 2 : 1; // then give it to the one which had bank0 in 1M mode
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}
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wram_1M_to_2M(Pico_mcd->word_ram2M);
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}
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#ifdef _ASM_CD_MEMORY_C
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PicoMemResetCD(d);
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#endif
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}
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else
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d |= dold&1;
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if (d&1) d &= ~2; // return word RAM to m68k in 2M mode
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}
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break;
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}
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@ -307,7 +335,7 @@ static void s68k_reg_write8(u32 a, u32 d)
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}
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#ifndef _ASM_CD_MEMORY_C
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static u32 OtherRead16End(u32 a, int realsize)
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{
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u32 d=0;
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@ -334,12 +362,17 @@ static void OtherWrite8End(u32 a, u32 d, int realsize)
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#undef _ASM_MEMORY_C
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#include "../MemoryCmn.c"
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#include "cell_map.c"
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#endif // !def _ASM_CD_MEMORY_C
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// -----------------------------------------------------------------
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// Read Rom and read Ram
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u8 PicoReadM68k8(u32 a)
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//u8 PicoReadM68k8_(u32 a);
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#ifdef _ASM_CD_MEMORY_C
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u8 PicoReadM68k8(u32 a);
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#else
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static u8 PicoReadM68k8(u32 a)
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{
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u32 d=0;
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@ -350,28 +383,12 @@ u8 PicoReadM68k8(u32 a)
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if (a < 0x20000) { d = *(u8 *)(Pico_mcd->bios+(a^1)); goto end; } // bios
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// prg RAM
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if ((a&0xfe0000)==0x020000) {
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if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&2)) {
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u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];
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d = *(prg_bank+((a^1)&0x1ffff));
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goto end;
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}
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#if 0
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if (a == 0x200000 && SekPc == 0xff0b66 && Pico.m.frame_count > 1000)
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{
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int i;
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FILE *ff;
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unsigned short *ram = (unsigned short *) Pico.ram;
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// unswap and dump RAM
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for (i = 0; i < 0x10000/2; i++)
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ram[i] = (ram[i]>>8) | (ram[i]<<8);
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ff = fopen("ram.bin", "wb");
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fwrite(ram, 1, 0x10000, ff);
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fclose(ff);
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exit(0);
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}
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#endif
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// word RAM
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if ((a&0xfc0000)==0x200000) {
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wrdprintf("m68k_wram r8: [%06x] @%06x", a, SekPc);
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@ -406,9 +423,13 @@ u8 PicoReadM68k8(u32 a)
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#endif
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return (u8)d;
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}
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#endif
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u16 PicoReadM68k16(u32 a)
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#ifdef _ASM_CD_MEMORY_C
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u16 PicoReadM68k16(u32 a);
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#else
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static u16 PicoReadM68k16(u32 a)
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{
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u16 d=0;
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@ -419,7 +440,7 @@ u16 PicoReadM68k16(u32 a)
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if (a < 0x20000) { d = *(u16 *)(Pico_mcd->bios+a); goto end; } // bios
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// prg RAM
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if ((a&0xfe0000)==0x020000) {
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if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&2)) {
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u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];
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d = *(u16 *)(prg_bank+(a&0x1fffe));
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goto end;
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@ -457,9 +478,13 @@ u16 PicoReadM68k16(u32 a)
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#endif
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return d;
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}
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#endif
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u32 PicoReadM68k32(u32 a)
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#ifdef _ASM_CD_MEMORY_C
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u32 PicoReadM68k32(u32 a);
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#else
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static u32 PicoReadM68k32(u32 a)
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{
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u32 d=0;
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@ -470,7 +495,7 @@ u32 PicoReadM68k32(u32 a)
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if (a < 0x20000) { u16 *pm=(u16 *)(Pico_mcd->bios+a); d = (pm[0]<<16)|pm[1]; goto end; } // bios
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// prg RAM
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if ((a&0xfe0000)==0x020000) {
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if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&2)) {
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u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];
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u16 *pm=(u16 *)(prg_bank+(a&0x1fffe));
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d = (pm[0]<<16)|pm[1];
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@ -485,10 +510,10 @@ u32 PicoReadM68k32(u32 a)
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if (a >= 0x220000) { // cell arranged
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u32 a1, a2;
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a1 = (a&2) | (cell_map(a >> 2) << 2);
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if (a&2) a2 = cell_map((a+2) >> 2) << 2;
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else a2 = a1 + 2;
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d = *(u16 *)(Pico_mcd->word_ram1M[bank]+a1) << 16;
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d |= *(u16 *)(Pico_mcd->word_ram1M[bank]+a2);
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if (a&2) a2 = cell_map((a+2) >> 2) << 2;
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else a2 = a1 + 2;
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d = *(u16 *)(Pico_mcd->word_ram1M[bank]+a1) << 16;
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d |= *(u16 *)(Pico_mcd->word_ram1M[bank]+a2);
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} else {
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u16 *pm=(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe)); d = (pm[0]<<16)|pm[1];
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}
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@ -514,12 +539,16 @@ u32 PicoReadM68k32(u32 a)
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#endif
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return d;
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}
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#endif
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// -----------------------------------------------------------------
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// Write Ram
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void PicoWriteM68k8(u32 a,u8 d)
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#ifdef _ASM_CD_MEMORY_C
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void PicoWriteM68k8(u32 a,u8 d);
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#else
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static void PicoWriteM68k8(u32 a,u8 d)
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{
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#ifdef __debug_io
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dprintf("w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);
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@ -536,7 +565,7 @@ void PicoWriteM68k8(u32 a,u8 d)
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a&=0xffffff;
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// prg RAM
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if ((a&0xfe0000)==0x020000) {
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if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&2)) {
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u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];
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*(u8 *)(prg_bank+((a^1)&0x1ffff))=d;
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return;
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@ -563,9 +592,13 @@ void PicoWriteM68k8(u32 a,u8 d)
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OtherWrite8(a,d,8);
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}
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#endif
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void PicoWriteM68k16(u32 a,u16 d)
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#ifdef _ASM_CD_MEMORY_C
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void PicoWriteM68k16(u32 a,u16 d);
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#else
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static void PicoWriteM68k16(u32 a,u16 d)
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{
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#ifdef __debug_io
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dprintf("w16: %06x, %04x", a&0xffffff, d);
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@ -580,7 +613,7 @@ void PicoWriteM68k16(u32 a,u16 d)
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a&=0xfffffe;
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// prg RAM
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if ((a&0xfe0000)==0x020000) {
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if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&2)) {
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u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];
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*(u16 *)(prg_bank+(a&0x1fffe))=d;
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return;
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@ -607,9 +640,13 @@ void PicoWriteM68k16(u32 a,u16 d)
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OtherWrite16(a,d);
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}
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#endif
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void PicoWriteM68k32(u32 a,u32 d)
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#ifdef _ASM_CD_MEMORY_C
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void PicoWriteM68k32(u32 a,u32 d);
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#else
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static void PicoWriteM68k32(u32 a,u32 d)
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{
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#ifdef __debug_io
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dprintf("w32: %06x, %08x", a&0xffffff, d);
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@ -626,7 +663,7 @@ void PicoWriteM68k32(u32 a,u32 d)
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a&=0xfffffe;
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// prg RAM
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if ((a&0xfe0000)==0x020000) {
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if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&2)) {
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u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];
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u16 *pm=(u16 *)(prg_bank+(a&0x1fffe));
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pm[0]=(u16)(d>>16); pm[1]=(u16)d;
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@ -642,10 +679,10 @@ void PicoWriteM68k32(u32 a,u32 d)
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if (a >= 0x220000) { // cell arranged
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u32 a1, a2;
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a1 = (a&2) | (cell_map(a >> 2) << 2);
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if (a&2) a2 = cell_map((a+2) >> 2) << 2;
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else a2 = a1 + 2;
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*(u16 *)(Pico_mcd->word_ram1M[bank]+a1) = d >> 16;
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*(u16 *)(Pico_mcd->word_ram1M[bank]+a2) = d;
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if (a&2) a2 = cell_map((a+2) >> 2) << 2;
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else a2 = a1 + 2;
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*(u16 *)(Pico_mcd->word_ram1M[bank]+a1) = d >> 16;
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*(u16 *)(Pico_mcd->word_ram1M[bank]+a2) = d;
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} else {
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u16 *pm=(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe));
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pm[0]=(u16)(d>>16); pm[1]=(u16)d;
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@ -664,12 +701,15 @@ void PicoWriteM68k32(u32 a,u32 d)
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OtherWrite16(a, (u16)(d>>16));
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OtherWrite16(a+2,(u16)d);
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}
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#endif
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// -----------------------------------------------------------------
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u8 PicoReadS68k8(u32 a)
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#ifdef _ASM_CD_MEMORY_C
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u8 PicoReadS68k8(u32 a);
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#else
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static u8 PicoReadS68k8(u32 a)
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{
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u32 d=0;
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@ -753,9 +793,14 @@ u8 PicoReadS68k8(u32 a)
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#endif
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return (u8)d;
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}
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#endif
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u16 PicoReadS68k16(u32 a)
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//u16 PicoReadS68k16_(u32 a);
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#ifdef _ASM_CD_MEMORY_C
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u16 PicoReadS68k16(u32 a);
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#else
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static u16 PicoReadS68k16(u32 a)
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{
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u32 d=0;
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@ -808,17 +853,17 @@ u16 PicoReadS68k16(u32 a)
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// bram
|
||||
if ((a&0xff0000)==0xfe0000) {
|
||||
dprintf("s68k_bram r16: [%06x] @%06x", a, SekPcS68k);
|
||||
dprintf("FIXME: s68k_bram r16: [%06x] @%06x", a, SekPcS68k);
|
||||
a = (a>>1)&0x1fff;
|
||||
d = Pico_mcd->bram[a++]; // Gens does little endian here, and so do we..
|
||||
d|= Pico_mcd->bram[a++] << 8;
|
||||
d|= Pico_mcd->bram[a++] << 8; // This is most likely wrong
|
||||
dprintf("ret = %04x", d);
|
||||
goto end;
|
||||
}
|
||||
|
||||
// PCM
|
||||
if ((a&0xff8000)==0xff0000) {
|
||||
dprintf("s68k_pcm r16: [%06x] @%06x", a, SekPcS68k);
|
||||
dprintf("FIXME: s68k_pcm r16: [%06x] @%06x", a, SekPcS68k);
|
||||
a &= 0x7fff;
|
||||
if (a >= 0x2000)
|
||||
d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff];
|
||||
|
|
@ -840,9 +885,13 @@ u16 PicoReadS68k16(u32 a)
|
|||
#endif
|
||||
return d;
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
u32 PicoReadS68k32(u32 a)
|
||||
#ifdef _ASM_CD_MEMORY_C
|
||||
u32 PicoReadS68k32(u32 a);
|
||||
#else
|
||||
static u32 PicoReadS68k32(u32 a)
|
||||
{
|
||||
u32 d=0;
|
||||
|
||||
|
|
@ -898,7 +947,7 @@ u32 PicoReadS68k32(u32 a)
|
|||
|
||||
// PCM
|
||||
if ((a&0xff8000)==0xff0000) {
|
||||
dprintf("s68k_pcm r32: [%06x] @%06x", a, SekPcS68k);
|
||||
dprintf("FIXME: s68k_pcm r32: [%06x] @%06x", a, SekPcS68k);
|
||||
a &= 0x7fff;
|
||||
if (a >= 0x2000) {
|
||||
a >>= 1;
|
||||
|
|
@ -921,7 +970,7 @@ u32 PicoReadS68k32(u32 a)
|
|||
|
||||
// bram
|
||||
if ((a&0xff0000)==0xfe0000) {
|
||||
dprintf("s68k_bram r32: [%06x] @%06x", a, SekPcS68k);
|
||||
dprintf("FIXME: s68k_bram r32: [%06x] @%06x", a, SekPcS68k);
|
||||
a = (a>>1)&0x1fff;
|
||||
d = Pico_mcd->bram[a++] << 16; // middle endian? TODO: verify against Fusion..
|
||||
d|= Pico_mcd->bram[a++] << 24;
|
||||
|
|
@ -940,6 +989,7 @@ u32 PicoReadS68k32(u32 a)
|
|||
#endif
|
||||
return d;
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
/* check: jaguar xj 220 (draws entire world using decode) */
|
||||
|
|
@ -998,7 +1048,10 @@ static void decode_write16(u32 a, u16 d, int r3)
|
|||
|
||||
// -----------------------------------------------------------------
|
||||
|
||||
void PicoWriteS68k8(u32 a,u8 d)
|
||||
#ifdef _ASM_CD_MEMORY_C
|
||||
void PicoWriteS68k8(u32 a,u8 d);
|
||||
#else
|
||||
static void PicoWriteS68k8(u32 a,u8 d)
|
||||
{
|
||||
#ifdef __debug_io2
|
||||
dprintf("s68k w8 : %06x, %02x @%06x", a&0xffffff, d, SekPcS68k);
|
||||
|
|
@ -1068,9 +1121,13 @@ void PicoWriteS68k8(u32 a,u8 d)
|
|||
|
||||
dprintf("s68k w8 : %06x, %02x @%06x", a&0xffffff, d, SekPcS68k);
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
void PicoWriteS68k16(u32 a,u16 d)
|
||||
#ifdef _ASM_CD_MEMORY_C
|
||||
void PicoWriteS68k16(u32 a,u16 d);
|
||||
#else
|
||||
static void PicoWriteS68k16(u32 a,u16 d)
|
||||
{
|
||||
#ifdef __debug_io2
|
||||
dprintf("s68k w16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);
|
||||
|
|
@ -1093,7 +1150,7 @@ void PicoWriteS68k16(u32 a,u16 d)
|
|||
else {
|
||||
if (a == 0xe) { // special case, 2 byte writes would be handled differently
|
||||
Pico_mcd->s68k_regs[0xf] = d;
|
||||
return;
|
||||
return;
|
||||
}
|
||||
s68k_reg_write8(a, d>>8);
|
||||
s68k_reg_write8(a+1,d&0xff);
|
||||
|
|
@ -1148,9 +1205,13 @@ void PicoWriteS68k16(u32 a,u16 d)
|
|||
|
||||
dprintf("s68k w16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
void PicoWriteS68k32(u32 a,u32 d)
|
||||
#ifdef _ASM_CD_MEMORY_C
|
||||
void PicoWriteS68k32(u32 a,u32 d);
|
||||
#else
|
||||
static void PicoWriteS68k32(u32 a,u32 d)
|
||||
{
|
||||
#ifdef __debug_io2
|
||||
dprintf("s68k w32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);
|
||||
|
|
@ -1239,7 +1300,7 @@ void PicoWriteS68k32(u32 a,u32 d)
|
|||
|
||||
dprintf("s68k w32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
// -----------------------------------------------------------------
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue