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[SCD] improved CDD emulation accuracy (various fixes in CD player menu)

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This commit is contained in:
EkeEke 2012-10-25 01:14:53 +02:00
parent 8b3f89addf
commit 7530e89c01
2 changed files with 17 additions and 15 deletions
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30
source/cd_hw/cdd.c
View File

@ -920,6 +920,9 @@ void cdd_update(void)
}
else if (cdd.toc.tracks[cdd.index].fd)
{
/* AUDIO track playing */
scd.regs[0x36>>1].byte.h = 0x00;
if (cdd.lba < cdd.toc.tracks[cdd.index].start)
{
fseek(cdd.toc.tracks[cdd.index].fd, (cdd.toc.tracks[cdd.index].start * 2352) - cdd.toc.tracks[cdd.index].offset, SEEK_SET);
@ -961,38 +964,37 @@ void cdd_process(void)
case 0x02: /* Read TOC */
{
/* Infos automatically retrieved by CDD processor from Q-Channel */
/* commands 0x00-0x02: from current block Q-Channel data field */
/* commands 0x03-0x05: from Lead-In area Q-Channel data field */
/* commands 0x00-0x02 (current block) and 0x03-0x05 (Lead-In) */
switch (scd.regs[0x44>>1].byte.l)
{
case 0x00: /* Absolute position (MM:SS:FF) */
case 0x00: /* Current Absolute Time (MM:SS:FF) */
{
int lba = cdd.lba + 150;
scd.regs[0x38>>1].w = cdd.status << 8;
scd.regs[0x3a>>1].w = lut_BCD_16[(lba/75)/60];
scd.regs[0x3c>>1].w = lut_BCD_16[(lba/75)%60];
scd.regs[0x3e>>1].w = lut_BCD_16[(lba%75)];
scd.regs[0x40>>1].byte.h = 0x00; /* TODO: check what is returned in RS8 (note: bit 1 is checked by BIOS) */
scd.regs[0x40>>1].byte.h = cdd.index ? 0x01 : 0x04; /* Current block flags (bit0 = mute status, bit1: pre-emphasis status, bit2: track type) */
break;
}
case 0x01: /* Track relative position (MM:SS:FF) */
case 0x01: /* Current Track Relative Time (MM:SS:FF) */
{
int lba = cdd.lba - cdd.toc.tracks[cdd.index].start;
scd.regs[0x38>>1].w = (cdd.status << 8) | 0x01;
scd.regs[0x3a>>1].w = lut_BCD_16[(lba/75)/60];
scd.regs[0x3c>>1].w = lut_BCD_16[(lba/75)%60];
scd.regs[0x3e>>1].w = lut_BCD_16[(lba%75)];
scd.regs[0x40>>1].byte.h = 0x00; /* TODO: check what is returned in RS8 */
scd.regs[0x40>>1].byte.h = cdd.index ? 0x00 : 0x04; /* Current block flags (bit0 = mute status, bit1: pre-emphasis status, bit2: track type) */
break;
}
case 0x02: /* Current track */
case 0x02: /* Current Track Number */
{
scd.regs[0x38>>1].w = (cdd.status << 8) | 0x02;
scd.regs[0x3a>>1].w = (cdd.index < cdd.toc.last) ? lut_BCD_16[cdd.index + 1] : 0x0A0A;
scd.regs[0x3c>>1].w = 0x0000;
scd.regs[0x3e>>1].w = 0x0000; /* TODO: check what is returned in RS6 */
scd.regs[0x3e>>1].w = 0x0000; /* Disk Control Code (?) in RS6 */
scd.regs[0x40>>1].byte.h = 0x00;
break;
}
@ -1008,17 +1010,17 @@ void cdd_process(void)
break;
}
case 0x04: /* Number of tracks */
case 0x04: /* First & Last Track Numbers */
{
scd.regs[0x38>>1].w = (cdd.status << 8) | 0x04;
scd.regs[0x3a>>1].w = 0x0001;
scd.regs[0x3c>>1].w = lut_BCD_16[cdd.toc.last];
scd.regs[0x3e>>1].w = 0x0000; /* TODO: check what is returned in RS6-RS7 */
scd.regs[0x40>>1].byte.h = 0x00; /* TODO: check what is returned in RS8 */
scd.regs[0x3e>>1].w = 0x0000; /* Drive Version (?) in RS6-RS7 */
scd.regs[0x40>>1].byte.h = 0x00; /* Lead-In flags (bit0 = mute status, bit1: pre-emphasis status, bit2: track type) */
break;
}
case 0x05: /* Track start (MM:SS:FF) */
case 0x05: /* Track Start Time (MM:SS:FF) */
{
int track = scd.regs[0x46>>1].byte.h * 10 + scd.regs[0x46>>1].byte.l;
int lba = cdd.toc.tracks[track-1].start + 150;
@ -1026,10 +1028,10 @@ void cdd_process(void)
scd.regs[0x3a>>1].w = lut_BCD_16[(lba/75)/60];
scd.regs[0x3c>>1].w = lut_BCD_16[(lba/75)%60];
scd.regs[0x3e>>1].w = lut_BCD_16[(lba%75)];
scd.regs[0x40>>1].byte.h = track % 10;
scd.regs[0x40>>1].byte.h = track % 10; /* Track Number (low digit) */
if (track == 1)
{
/* RS6 bit 3 is set for DATA track */
/* RS6 bit 3 is set for the first (DATA) track */
scd.regs[0x3e>>1].byte.h |= 0x08;
}
break;

2
source/cd_hw/cdd.h
View File

@ -53,7 +53,7 @@
#define CD_END 0x0C
/* CD blocks scanning speed */
#define CD_SCAN_SPEED 10
#define CD_SCAN_SPEED 30
#define CD_MAX_TRACKS 100