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[Core/SCD] fixed CDD seek command again (Final Fight CD freeze with model 2

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BIOS)
This commit is contained in:
EkeEke 2013-06-27 01:46:17 +02:00
parent 11d275e2f8
commit f4f860e763
1 changed files with 21 additions and 16 deletions
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37
core/cd_hw/cdd.c
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@ -1230,8 +1230,20 @@ void cdd_process(void)
{ {
case 0x00: /* Drive Status */ case 0x00: /* Drive Status */
{ {
/* RS1-RS8 unchanged */ /* RS1-RS8 normally unchanged */
scd.regs[0x38>>1].byte.h = cdd.status; scd.regs[0x38>>1].byte.h = cdd.status;
/* unless RS1 indicated invalid track infos */
if (scd.regs[0x38>>1].byte.l == 0x0f)
{
/* and SEEK has ended */
if (cdd.status != CD_SEEK)
{
/* then return valid track infos, e.g current track number in RS2-RS3 (fixes Lunar - The Silver Star) */
scd.regs[0x38>>1].byte.l = 0x02;
scd.regs[0x3a>>1].w = (cdd.index < cdd.toc.last) ? lut_BCD_16[cdd.index + 1] : 0x0A0A;
}
}
break; break;
} }
@ -1482,13 +1494,13 @@ void cdd_process(void)
/* update status */ /* update status */
cdd.status = CD_SEEK; cdd.status = CD_SEEK;
/* return track index in RS2-RS3 (note: returning RS1=0x0f breaks Lunar - The Silver Star) */ /* unknown RS1-RS8 values (returning 0xF in RS1 invalidates track infos in RS2-RS8 and fixes Final Fight CD intro when seek time is emulated) */
scd.regs[0x38>>1].w = (CD_SEEK << 8) | 0x02; scd.regs[0x38>>1].w = (CD_SEEK << 8) | 0x0f;
scd.regs[0x3a>>1].w = (cdd.index < cdd.toc.last) ? lut_BCD_16[index + 1] : 0x0A0A; scd.regs[0x3a>>1].w = 0x0000;
scd.regs[0x3c>>1].w = 0x0000; scd.regs[0x3c>>1].w = 0x0000;
scd.regs[0x3e>>1].w = 0x0000; scd.regs[0x3e>>1].w = 0x0000;
scd.regs[0x40>>1].byte.h = 0x00; scd.regs[0x40>>1].w = ~(CD_SEEK + 0xf) & 0x0f;
break; return;
} }
case 0x06: /* Pause */ case 0x06: /* Pause */
@ -1539,16 +1551,9 @@ void cdd_process(void)
/* no audio track playing */ /* no audio track playing */
scd.regs[0x36>>1].byte.h = 0x01; scd.regs[0x36>>1].byte.h = 0x01;
/* update status */ /* update status (RS1-RS8 unchanged) */
cdd.status = CD_READY; cdd.status = scd.regs[0x38>>1].byte.h = CD_READY;
break;
/* unknown RS0-RS8 values (returning 0xF in RS1 invalidates track infos usually returned in RS2-RS8, also fixes Final Fight CD intro when seek time is emulated) */
scd.regs[0x38>>1].w = (CD_READY << 8) | 0x0f;
scd.regs[0x3a>>1].w = 0x0000;
scd.regs[0x3c>>1].w = 0x0000;
scd.regs[0x3e>>1].w = 0x0000;
scd.regs[0x40>>1].w = ~(CD_READY + 0xf) & 0x0f;
return;
} }
case 0x0c: /* Close Tray */ case 0x0c: /* Close Tray */