Function scsi_cd_emulate

src/blkdev.cpp:1432–2238

}

int scsi_cd_emulate (int unitnum, uae_u8 *cmdbuf, int scsi_cmd_len,
	uae_u8 *scsi_data, int *data_len, uae_u8 *r, int *reply_len, uae_u8 *s, int *sense_len, bool atapi)
{
	struct blkdevstate *st = &state[unitnum];
	uae_u32 len, offset;
	int lr = 0, ls = 0;
	int scsi_len = -1;
	int v;
	int status = 0;
	struct device_info di;
	uae_u8 cmd;
	int dlen, lun;
	
	if (cmdbuf == NULL) {
		if (st->mediawaschanged) {
			st->mediawaschanged = false;
			return (0x28 << 8) | (0x00);
		}
		return 0;
	}

	cmd = cmdbuf[0];

	if (cmd == 0x03) {
		return 0;
	}
	
	dlen = *data_len;
	*reply_len = *sense_len = 0;

	if (log_scsiemu) {
		write_log (_T("CD SCSIEMU %d: %02X.%02X.%02X.%02X.%02X.%02X.%02X.%02X.%02X.%02X.%02X.%02X CMDLEN=%d DATA=%p LEN=%d\n"), unitnum,
			cmdbuf[0], cmdbuf[1], cmdbuf[2], cmdbuf[3], cmdbuf[4], cmdbuf[5], cmdbuf[6], 
			cmdbuf[7], cmdbuf[8], cmdbuf[9], cmdbuf[10], cmdbuf[11],
			scsi_cmd_len, scsi_data, dlen);
	}

	lun = cmdbuf[1] >> 5;
	if (cmdbuf[0] != 0x03 && cmdbuf[0] != 0x12 && lun) {
		status = 2; /* CHECK CONDITION */
		s[0] = 0x70;
		s[2] = 5; /* ILLEGAL REQUEST */
		s[12] = 0x25; /* INVALID LUN */
		ls = 0x12;
		write_log (_T("CD SCSIEMU %d: CMD=%02X LUN=%d ignored\n"), unitnum, cmdbuf[0], lun);
		goto end;
	}

	sys_command_info (unitnum, &di, 1);

	switch (cmdbuf[0])
	{
	case 0x00: /* TEST UNIT READY */
		if (nodisk (&di))
			goto nodisk;
		scsi_len = 0;
		break;
	case 0x1e: /* PREVENT/ALLOW MEDIUM REMOVAL */