RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-09-05 15:27:46 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

mcd, improve cd status reporting

Browse source
This commit is contained in:
kub 2022-02-09 23:06:10 +00:00
parent 4f3912be75
commit d4a08748fa
2 changed files with 25 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

26
pico/cd/cdd.c
View file

@ -902,8 +902,20 @@ void cdd_process(void)
Pico_mcd->s68k_regs[0x38+0] = cdd.status;
/* unless RS1 indicated invalid track infos */
if (Pico_mcd->s68k_regs[0x38+1] == 0x0f)
if (Pico_mcd->s68k_regs[0x38+1] == 0x0f ||
Pico_mcd->s68k_regs[0x38+1] == 0x00 ||
Pico_mcd->s68k_regs[0x38+1] == 0x01)
{
int lba = cdd.lba + 150;
if (Pico_mcd->s68k_regs[0x38+1] == 0x01)
lba = abs(cdd.lba - cdd.toc.tracks[cdd.index].start);
if (Pico_mcd->s68k_regs[0x38+1] == 0x0f)
Pico_mcd->s68k_regs[0x38+1] = 0x00;
set_reg16(0x3a, lut_BCD_16[(lba/75)/60]);
set_reg16(0x3c, lut_BCD_16[(lba/75)%60]);
set_reg16(0x3e, lut_BCD_16[(lba%75)]);
Pico_mcd->s68k_regs[0x40+0] = cdd.index ? 0x00 : 0x04;
} else if (Pico_mcd->s68k_regs[0x38+1] == 0x02) {
/* then return valid track infos, e.g current track number in RS2-RS3 (fixes Lunar - The Silver Star) */
Pico_mcd->s68k_regs[0x38+1] = 0x02;
set_reg16(0x3a, (cdd.index < cdd.toc.last) ? lut_BCD_16[cdd.index + 1] : 0x0A0A);
@ -1009,6 +1021,16 @@ void cdd_process(void)
break;
}
case 0x06: /* Latest Error Information */
{
set_reg16(0x38, (cdd.status << 8) | 0x06);
set_reg16(0x3a, 0x0000);
set_reg16(0x3c, 0x0000);
set_reg16(0x3e, 0x0000);
Pico_mcd->s68k_regs[0x40+0] = 0x00;
break;
}
default:
{
#ifdef LOG_ERROR
@ -1038,7 +1060,7 @@ void cdd_process(void)
/* Wolf Team games (Anet Futatabi, Cobra Command, Road Avenger & Time Gal) need at least 6 interrupts delay */
/* Space Adventure Cobra (2nd morgue scene) needs at least 13 interrupts delay (incl. seek time, so 6 is OK) */
/* Jeopardy & ESPN Sunday Night NFL are picky about this as well: 10 interrupts delay (+ seek time) seems OK */
cdd.latency = 10;
cdd.latency = 11;
}
/* CD drive seek time */