I just managed to get a 40X CDROM to work in my Compaq Deskpro 66M.
I was about to give up, after trying two different CDROM drives etc.
For some reason the Lite-On 40X in the Digital Research Technology
package would not work. I tried two of them. Finally I got a NewCom
40X (actually a NEC CDR-3000A) and it works! Also required was a
DTC 2183E ISA to IDE adapter ($11 from CDW). I wanted to get a sound
card with an IDE interface, but they seem to be unavailable now. Two
low cost sound cards I looked at used to have the interface, but
current production leaves the parts off the board. So a Compaq 486
can have an IDE CDROM. Some models may be able to accommodate a CDROM
as a slave on the primary IDE controller with an updated configuration
utility (SP3737.exe or later) from the Compaq website.
Mike
>My turn to ask for help (-;
>My daughter bought a Compaq, seems to have a 60MHz 486DX in it,
>was obviously used on a network (ethernet card still in, lots
>of netware), running DOS6.20 and WIN3.1. She has an external
>modem, and has started to use JUNO. So far, so good, but
>she has decided to install WIN95 (sigh..... can't teach kids
>anything these days). To do that, she needed a CDROM, so
>she seems to have picked up a 24X generic from COMPUSA, along
>with the cable to extend it.
>She tried to install it herself, and the computer quit, so she
>brought it over. I took the CDROM back off, cleaned up her
>autoexec.bat and config.sys some (network card calls and all that
>which she no longer needs, and a call to win), and then tried
>again to install it. Started with the CDROM set as slave,
>and cable in the right direction (red line to pin 1), ran the
>install disk and restarted. The machine stalls for awhile in
>bootup, then announces that it cannot find the CDROM. If I try to
>switch the shorting pin to "master", the machine won't boot at all.
>There appears to be no pins on the hard drive (a 525Meg type 46 I
>believe) to reset it to slave, and I couldn't see any shorting pins
>to set on the motherboard. Of course, it was late and my eyes are
>getting old.....
>Tried several simpler settings in the config.sys, made sure that
>MSCDEX was in the path and existed, tried running it separately
>from autoexec.bat - no luck. It was getting late, and I have to
>up it early for work, so I gave up for the night. Anyone
>have any experience with Compaq 486's? Might the trouble be that
>the 24X is too fast? I guess I could try my 2X from my
>Pentium 166..........
>Thanks, jp
>J.P. Letellier
>Code 5320, Bld 47, Room 118
>Naval Research Laboratory
>4555 Overlook Avenue, S.W.
>Washington D. C. 20375-5336
>Phone: (202)767-2937 ; DSN: 297-2937
>FAX: (202)404-7999 ; (dsn fax) 754-7999
>e-mail: [EMAIL PROTECTED]
>[EMAIL PROTECTED]
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>www: http://radar-www.nrl.navy.mil/5320/
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