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https://github.com/RaySollium99/picodrive.git
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Sonic CD shows Sega logo
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@18 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz
parent
c459aefdad
commit
cb4a513a96
6 changed files with 116 additions and 45 deletions
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@ -16,13 +16,16 @@
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#include "../sound/ym2612.h"
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#include "../sound/sn76496.h"
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#include "gfx_cd.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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#define rdprintf dprintf
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//#define rdprintf dprintf
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#define rdprintf(...)
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// -----------------------------------------------------------------
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@ -31,7 +34,7 @@ typedef unsigned int u32;
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extern int counter75hz;
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static u32 m68k_reg_read16(u32 a, int realsize)
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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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a &= 0x3e;
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@ -52,7 +55,6 @@ static u32 m68k_reg_read16(u32 a, int realsize)
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d = Pico_mcd->m.hint_vector;
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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 0xA:
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@ -77,7 +79,7 @@ end:
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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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static 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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@ -139,16 +141,15 @@ static void m68k_reg_write8(u32 a, u32 d, int realsize)
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static u32 s68k_reg_read16(u32 a, int realsize)
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static u32 s68k_reg_read16(u32 a)
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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; // ver = 0, not in reset state
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d = ((Pico_mcd->s68k_regs[0]&3)<<8) | 1; // ver = 0, not in reset state
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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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@ -158,8 +159,7 @@ static u32 s68k_reg_read16(u32 a, int realsize)
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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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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 read");
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@ -178,9 +178,8 @@ end:
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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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static void s68k_reg_write8(u32 a, u32 d)
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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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@ -349,7 +348,7 @@ static u32 OtherRead16(u32 a, int realsize)
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if ((a&0xe700e0)==0xc00000) { d=PicoVideoRead(a); goto end; }
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if ((a&0xffffc0)==0xa12000) {
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d=m68k_reg_read16(a, realsize);
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d=m68k_reg_read16(a);
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goto end;
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}
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@ -411,7 +410,7 @@ static void OtherWrite8(u32 a,u32 d,int realsize)
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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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if ((a&0xffffc0)==0xa12000) { m68k_reg_write8(a, d); return; }
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dprintf("strange w%i: %06x, %08x @%06x", realsize, a&0xffffff, d, SekPc);
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}
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@ -767,8 +766,12 @@ u8 PicoReadS68k8(u32 a)
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// regs
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if ((a&0xfffe00) == 0xff8000) {
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rdprintf("s68k_regs r8: [%02x] @ %06x", a&0x1ff, SekPcS68k);
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d = s68k_reg_read16(a&~1, 8|(a&1)); if ((a&1)==0) d>>=8;
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a &= 0x1ff;
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rdprintf("s68k_regs r8: [%02x] @ %06x", a, SekPcS68k);
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if (a >= 0x50 && a < 0x68)
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d = gfx_cd_read(a&~1);
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else d = s68k_reg_read16(a&~1);
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if ((a&1)==0) d>>=8;
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rdprintf("ret = %02x", (u8)d);
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goto end;
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}
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@ -821,8 +824,11 @@ u16 PicoReadS68k16(u32 a)
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// regs
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if ((a&0xfffe00) == 0xff8000) {
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rdprintf("s68k_regs r16: [%02x] @ %06x", a&0x1fe, SekPcS68k);
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d = s68k_reg_read16(a, 16);
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a &= 0x1fe;
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rdprintf("s68k_regs r16: [%02x] @ %06x", a, SekPcS68k);
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if (a >= 0x50 && a < 0x68)
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d = gfx_cd_read(a);
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else d = s68k_reg_read16(a);
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rdprintf("ret = %04x", d);
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goto end;
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}
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@ -876,8 +882,11 @@ u32 PicoReadS68k32(u32 a)
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// regs
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if ((a&0xfffe00) == 0xff8000) {
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rdprintf("s68k_regs r32: [%02x] @ %06x", a&0x1fe, SekPcS68k);
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d = (s68k_reg_read16(a, 32)<<16)|s68k_reg_read16(a+2, 32);
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a &= 0x1fe;
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rdprintf("s68k_regs r32: [%02x] @ %06x", a, SekPcS68k);
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if (a >= 0x50 && a < 0x68)
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d = (gfx_cd_read(a)<<16)|gfx_cd_read(a+2);
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else d = (s68k_reg_read16(a)<<16)|s68k_reg_read16(a+2);
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rdprintf("ret = %08x", d);
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goto end;
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}
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@ -940,8 +949,11 @@ void PicoWriteS68k8(u32 a,u8 d)
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// regs
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if ((a&0xfffe00) == 0xff8000) {
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rdprintf("s68k_regs w8: [%02x] %02x @ %06x", a&0x1ff, d, SekPcS68k);
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s68k_reg_write8(a,d,8);
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a &= 0x1ff;
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rdprintf("s68k_regs w8: [%02x] %02x @ %06x", a, d, SekPcS68k);
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if (a >= 0x50 && a < 0x68)
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gfx_cd_write(a&~1, (d<<8)|d);
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else s68k_reg_write8(a,d);
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return;
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}
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@ -987,9 +999,14 @@ void PicoWriteS68k16(u32 a,u16 d)
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// regs
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if ((a&0xfffe00) == 0xff8000) {
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rdprintf("s68k_regs w16: [%02x] %04x @ %06x", a&0x1ff, d, SekPcS68k);
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s68k_reg_write8(a, d>>8, 16);
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s68k_reg_write8(a+1,d&0xff, 16);
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a &= 0x1fe;
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rdprintf("s68k_regs w16: [%02x] %04x @ %06x", a, d, SekPcS68k);
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if (a >= 0x50 && a < 0x68)
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gfx_cd_write(a, d);
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else {
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s68k_reg_write8(a, d>>8);
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s68k_reg_write8(a+1,d&0xff);
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}
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return;
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}
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@ -1036,11 +1053,17 @@ void PicoWriteS68k32(u32 a,u32 d)
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// regs
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if ((a&0xfffe00) == 0xff8000) {
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rdprintf("s68k_regs w32: [%02x] %08x @ %06x", a&0x1ff, d, SekPcS68k);
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s68k_reg_write8(a, d>>24, 32);
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s68k_reg_write8(a+1,(d>>16)&0xff, 32);
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s68k_reg_write8(a+2,(d>>8) &0xff, 32);
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s68k_reg_write8(a+3, d &0xff, 32);
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a &= 0x1fe;
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rdprintf("s68k_regs w32: [%02x] %08x @ %06x", a, d, SekPcS68k);
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if (a >= 0x50 && a < 0x68) {
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gfx_cd_write(a, d>>16);
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gfx_cd_write(a+2, d&0xffff);
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} else {
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s68k_reg_write8(a, d>>24);
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s68k_reg_write8(a+1,(d>>16)&0xff);
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s68k_reg_write8(a+2,(d>>8) &0xff);
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s68k_reg_write8(a+3, d &0xff);
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}
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return;
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}
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