Probably not a lot of help, but if that interface is
the same physically
as the DA15 connector on other Philips/LMS CD-ROMs, I have the service
manual for the CDD462. It's little more than a schematic and an
incomplete parts list (the CDD462 is based on an audio CD-player, and
you're expected to have the service manual for that!), but it would
contain the interface pinout. Let me know if you want me to dig it out.
Maybe - I don't suppose it describes any DIP switches on the back of the
drive? The actual drive in the RRD40 is a Laser Magnetics CM 201, so it's
unlikely that they'd be the same, but you never know.
I ask because I happened to find this article
http://h71000.www7.hp.com/wizard/wiz_3914.html
The wizard describes the RRD40-DC as a "slave drive" for use with an
existing KRQ50/RRD40 pair.
Question - what's the difference between a RRD40-DC and the RRD40-HC? Is
there a switch or jumper in the drive that makes it a "slave"?
Ah, if only I had a manual :-)
Bob