22 Jul
2005
22 Jul
'05
6:58 a.m.
On Thu, 2005-07-21 16:04:53 -0500, Ethan Dicks <ethan.dicks at gmail.com> wrote:
On 7/21/05, Tony Duell <ard at
p850ug1.demon.co.uk> wrote:
I have a Planar-brand bolt-to-the-wall-for-the-medical-industry 486
w/integral LCD that has a DB44 for an external IDE CDROM connection.
Without docs, I traced out the DB25 for the external MFM floppy so I
could boot an install floppy, but lacking a handy DB44M soldertail
connector or pre-made cable to cannibalize, I never bothered tracing
out the CD-ROM connector.
Erm, I seem to remember these CD-ROMs too. I'm not sure if I still have
that CD-ROM and it's ISA card around, but for sure the card basically
contained a 8255 (the parport chip used in PeeCees). The board's
schematics were quite easy to reverse-engineer (after all, it's
basically a printer card with an uncommon connector on the CD-ROM side
and an address decoder on the bus side).
For what it's worth, I even have some programming notes around (for I've
seen them not long ago, but I cannot find them right now :-)
If memory serves me correctly, the CD-ROM was made by Hitachi, but
that's only an educated guess right now...
MfG, JBG
--
Jan-Benedict Glaw jbglaw at lug-owl.de . +49-172-7608481 _ O _
"Eine Freie Meinung in einem Freien Kopf | Gegen Zensur | Gegen Krieg _ _ O
fuer einen Freien Staat voll Freier B?rger" | im Internet! | im Irak! O O O
ret = do_actions((curr | FREE_SPEECH) & ~(NEW_COPYRIGHT_LAW | DRM | TCPA));
!!
Interesting. Where'd you see that, Tony?
In some catalogue, along with the DA26. I don't think I've seen either in
the flesh...