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Assorted CD-ROM fixes, including for the READ CD command on a data sector on an ATAPI, fixes MTMCDAI.SYS when used with the Acer CPR CD.

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OBattler
2022-10-31 02:13:20 +01:00
parent e9cf6dc269
commit a588fa8c0a
1 changed files with 18 additions and 2 deletions
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20
src/scsi/scsi_cdrom.c
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@@ -541,6 +541,7 @@ static void
scsi_cdrom_update_request_length(scsi_cdrom_t *dev, int len, int block_len)
{
int32_t bt, min_len = 0;
double dlen;
dev->max_transfer_len = dev->request_length;
@@ -589,6 +590,16 @@ scsi_cdrom_update_request_length(scsi_cdrom_t *dev, int len, int block_len)
else if (len > dev->max_transfer_len)
dev->request_length = dev->max_transfer_len;
/* READ CD MSF and READ CD: Round the request length to the sector size - the device must ensure
that a media access comand does not DRQ in the middle of a sector. One of the drivers that
relies on the correctness of this behavior is MTMCDAI.SYS (the Mitsumi CD-ROM driver) for DOS
which uses the READ CD command to read data on some CD types. */
if (dev->current_cdb[0] == 0xb9) || (dev->current_cdb[0] == 0xbe) {
/* Round to sector length. */
dlen = ((double) dev->request_length) / ((double) block_len);
dev->request_length = ((uint16_t) floor(dlen)) * block_len;
}
return;
}
@@ -1011,8 +1022,8 @@ scsi_cdrom_read_blocks(scsi_cdrom_t *dev, int32_t *len, int first_batch)
if (ret == -1)
return 0;
else if (!ret || ((dev->old_len != *len) && !first_batch)) {
if ((dev->old_len != *len) && !first_batch)
else if (!ret || (!first_batch && (dev->old_len != *len))) {
if (!first_batch && (dev->old_len != *len))
scsi_cdrom_illegal_mode(dev);
return 0;
@@ -2716,8 +2727,13 @@ scsi_cdrom_identify(ide_t *ide, int ide_has_dma)
ide_padstr((char *) (ide->buffer + 27), device_identify, 40); /* Model */
#else
if (dev->early) {
#ifdef WRONG
ide_padstr((char *) (ide->buffer + 23), "1.01 ", 8); /* Firmware */
ide_padstr((char *) (ide->buffer + 27), "NEC CD-ROM DRIVE:260 ", 40); /* Model */
#else
ide_padstr((char *) (ide->buffer + 23), ".110 ", 8); /* Firmware */
ide_padstr((char *) (ide->buffer + 27), "EN C DCR-MOD IREV2:06 ", 40); /* Model */
#endif
} else {
ide_padstr((char *) (ide->buffer + 23), "0020 ", 8); /* Firmware */
ide_padstr((char *) (ide->buffer + 27), "HITACHI CDR-8130 ", 40); /* Model */