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Implement READ PMA command.

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This commit is contained in:
Natalia Portillo
2025-09-24 04:21:30 +01:00
parent ea339fb2ec
commit 864bd03c99
3 changed files with 21 additions and 0 deletions
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15
src/cdrom/cdrom.c
View File

@@ -2149,6 +2149,21 @@ cdrom_get_current_subcodeq_playstatus(cdrom_t *dev, uint8_t *b)
return ret;
}
int
cdrom_read_pma(const cdrom_t *dev, uint8_t *b, const int max_len)
{
if (max_len < 4)
return -1;
// This is exactly what a blank CD-R returns, no PMA, seems only CD-RWs have PMA?
b[0] = 0x00; /* PMA Data Length (MSB) */
b[1] = 0x02; /* PMA Data Length (LSB) */
b[2] = 0x00; /* Reserved */
b[3] = 0x00; /* Reserved */
return 4;
}
int
cdrom_read_toc(const cdrom_t *dev, uint8_t *b, const int type,
const uint8_t start_track, const int msf, const int max_len)

1
src/include/86box/cdrom.h
View File

@@ -446,6 +446,7 @@ extern void cdrom_get_current_subcodeq(cdrom_t *dev, uint8_t *b);
extern uint8_t cdrom_get_current_subcodeq_playstatus(cdrom_t *dev, uint8_t *b);
extern int cdrom_read_toc(const cdrom_t *dev, uint8_t *b, const int type,
const uint8_t start_track, const int msf, const int max_len);
extern int cdrom_read_pma(const cdrom_t *dev, uint8_t *b, const int max_len);
extern int cdrom_read_toc_sony(const cdrom_t *dev, uint8_t *b, const uint8_t start_track,
const int msf, const int max_len);
#ifdef USE_CDROM_MITSUMI

5
src/scsi/scsi_cdrom.c
View File

@@ -2658,6 +2658,11 @@ scsi_cdrom_command(scsi_common_t *sc, const uint8_t *cdb)
scsi_cdrom_set_buf_len(dev, BufLen, &len);
scsi_cdrom_data_command_finish(dev, len, len, len, 0);
}
} else if (toc_format == 3 && dev->drv->cd_status == CD_STATUS_BLANK_CDR) {
len = cdrom_read_pma(dev->drv, dev->buffer, max_len);
scsi_cdrom_set_buf_len(dev, BufLen, &len);
scsi_cdrom_data_command_finish(dev, len, len, len, 0);
} else
scsi_cdrom_invalid_field(dev, toc_format);
break;