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Date: Thu, 23 May 1996 09:29:07 -0400
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From: "Russell D. Murphy" <rdmurphy@acs.bu.edu>
To: mcortes@cs.sunysb.edu
Cc: hardware@FreeBSD.org
Subject: Sony CDU-76S CD-ROM patch
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Here's the patch that I received to enable audio CD-ROM playing on
a Sony CDU-76 CD-ROM.  My recollection is that I had to apply the
patch by hand.

Russ Murphy
|--------------------------
|Date: Thu, 21 Mar 96 12:38:38 +0100
|From: Jean-Marc Zucconi <jmz@cabri.obs-besancon.fr>
|To: rdmurphy@acs.bu.edu
|
|>>>>> rdmurphy  writes:
|
| > I have a question about playing an audio CD (through headphones)
| > on my CD-ROM drive.  I've tried using a couple different programs
| > without success.  Using "cdplay", I can access the drive, in the
| > sense that it lists the tracks, but it won't play the CD.  When I
| > attempt to play it, the following message is generated:
|
| > cd0(ncr0:3:0): ILLEGAL REQUEST asc:26,0 Invalid field in parameter list
|
| > Any idea what's going on here?
|
| > My system:
|
| > FreeBSD 2.1-STABLE #0: Mon Mar 11 01:03:52  1996
| >     root@dunquin:/usr/src/sys/compile/DUNQUIN
< stuff deleted >
| > ncr0 <ncr 53c810 scsi> rev 2 int a irq 11 on pci0:12
| > ncr0 waiting for scsi devices to settle
| > (ncr0:0:0): "FUJITSU M1606S-512 6234" type 0 fixed SCSI 2
| > sd0(ncr0:0:0): Direct-Access 
| > sd0(ncr0:0:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8.
| > 1041MB (2131992 512 byte sectors)
| > (ncr0:3:0): "SONY CD-ROM CDU-76S 1.1c" type 5 removable SCSI 2
|
|Go to /sys/scsi, apply the following patch to cd.c and recompile
|***************
|*** 1093,1098 ****
|--- 1093,1104 ----
|        scsi_cmd.byte2 |= SMS_PF;
|        scsi_cmd.length = sizeof(*data) & 0xff;
|        data->header.data_length = 0;
|+       /*
|+        * SONY drives do not allow a mode select with a medium_type
|+        * value that has just been returned by a mode sense; use a
|+        * medium_type of 0 (Default) instead.
|+        */
|+       data->header.medium_type = 0;
|        return (scsi_scsi_cmd(SCSI_LINK(&cd_switch, unit),
|                (struct scsi_generic *) &scsi_cmd,
|                sizeof(scsi_cmd),
|
|Jean-Marc
| _____________________________________________________________________________
| Jean-Marc Zucconi       Observatoire de Besancon       F 25010 Besancon cedex
|                   PGP Key: finger jmz@cabri.obs-besancon.fr
| =============================================================================