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From: Donn Miller <dmm125@bellatlantic.net>
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: sony cdu531A (old cdrom) drivers
Date: Mon, 7 Jul 1997 05:58:33 +0000
Organization: Bell Atlantic Internet Solutions
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I'm just checking around to see if anybody has a driver for the Sony
cdu531a.  It is an old cdrom from 1991 with a caddy, and maybe 2x speed.
I've checked and FreeBSD has a driver for the cdu31a, which is very
similar but is different enough not to work.

There is a Linux driver for both cdu31 and 531, and I thought I could
create a driver for Freebsd by examining the differences between the two
Linux drivers, and applying this to the existing FreeBSD 31a driver.  The
equation would be:

	Linux(cdu31a) - Linux(cdu531a) + FreeBSD(cdu31a) = FreeBSD(531a)

I might try to do the driver myself, but thought I might see if anybody
already did this, and evaluate the driver.

Also, I'm looking for any helpful hints on how to test out a driver
without actually recompiling the kernel and rebooting - sort of a main()
wrapper for the driver source.

Of course, the driver would have to be given a new device node name to
differentiate it - "scd0" is the name of the existing cdu31a driver, so
maybe "scdu0" would be a good name for the cdu531a driver.

Thanks for any help

   Donn

   email: dmm125@bellatlantic.net
   phone: 412 547-9089