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Thread: Compaq Deskpro 386 Drive Types

  1. #1

    Default Compaq Deskpro 386 Drive Types

    Does anyone have a list of the drive type numbers and cyl/head/sector specs for the Compaq Deskpro 386?

    Thanks,
    Bill

  2. #2

    Default

    I didn't dig all the way through the site (seems like it *MAY* be hosted on a backup server somewhere lol) http://h10025.www1.hp.com/ewfrf/wc/p...n&dlc=en&cc=us but they have it listed still if you want to hunt around for manuals.

    The settings would be more dependent on the hard drive/controller manufacturer and size though, any idea what you have in there?

    http://www.computerhope.com/hdspecs.htm has some listings.
    Looking to acquire: IBM 5100, Altair 8800

  3. #3

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    I suspect that the list of drive types on the Compaq Portable III is similar.

  4. #4

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    Quote Originally Posted by JohnElliott View Post
    I suspect that the list of drive types on the Compaq Portable III is similar.
    Thanks! I hunted high and low on Google and couldn't find that.

    Bill

  5. #5
    Join Date
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    Default

    Refer to page 431 of the PDF book at flammingfiles.tripod.com/files/biosdl.pdf
    It covers the Compaq Deskpro 386.

  6. #6

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    Quote Originally Posted by barythrin View Post
    I didn't dig all the way through the site (seems like it *MAY* be hosted on a backup server somewhere lol) http://h10025.www1.hp.com/ewfrf/wc/p...n&dlc=en&cc=us but they have it listed still if you want to hunt around for manuals.

    The settings would be more dependent on the hard drive/controller manufacturer and size though, any idea what you have in there?

    http://www.computerhope.com/hdspecs.htm has some listings.
    The reason I asked, I have an original Type 17 drive, but I don't want to wear it out. So I'm putting in a more modern drive, and wanted to find which drive type would most closely match it so I can get as much space out of it as possible.

    All set now.

    Bill

  7. #7

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    The Deskpro 386 I used at work years ago had the very earliest implementation of IDE. I managed to kill the half-height 40 MB CDC disk when the rear feet of the heavy metal-encased monitor I had sitting on top slipped off the back and thumped the running machine.

    If you are not concerned about authenticity for this exercise how about using a SCSI disk subsytem instead? It's easy to find an Adaptec ISA-bus controller and it will work with just about any 50-pin SCSI drive.
    IBM 5170/5053, 2 x 5150/5051
    Sun IPC, Ultra1 and SPARCclassic with tape, disk and CD
    HP Apollo 9000/735
    Silicon Graphics Indy, O2
    Radio Shack TRS-80 model 100
    Apple Mac Plus, DEC 5000/25

  8. #8

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    I think most of the Deskpro 386 machines had CDC Hard Drives. The one I had a few years back had a CDC 40MB Drive in it, early IDE, just like the guy above.

    I think some early ones may have had ESDI interface, or maybe even RLL. I read there were 2 versions of the 386 Deskpro's initial 16 MHz version, and there were small improvements in the second version, memory card interface being one of them (32-bit as opposed to 16-bit), and there was an internal diagram showing 2 drive cables ala ESDI/MFM/RLL.

    Sure this is all speculation, but this is what I know.

  9. #9

    Default

    Yes, mine has the CDC / Magnetic Peripherals early IDE drive and controller.
    All that works fine. I just didn't want to "use" that drive and wear it out sooner,
    and also wanted to preserve the original Compaq DOS 3.1 as-is on there.

    I installed another (worthless to me) early IDE in its place for my experiments.
    It doesn't match up with anything in the drive types, but Type 9 is close enough to get most of the drive's capacity so I used that.

    Since my original post, Windows for Workgroups 3.11 installed successfully, although the machine doesn't have enough extended memory to run the networking components. And now the power supply has failed. So that's now under the knife.

    Bill

  10. #10

    Default

    Quote Originally Posted by Mad-Mike View Post
    I think most of the Deskpro 386 machines had CDC Hard Drives. The one I had a few years back had a CDC 40MB Drive in it, early IDE, just like the guy above.

    I think some early ones may have had ESDI interface, or maybe even RLL. I read there were 2 versions of the 386 Deskpro's initial 16 MHz version, and there were small improvements in the second version, memory card interface being one of them (32-bit as opposed to 16-bit), and there was an internal diagram showing 2 drive cables ala ESDI/MFM/RLL.

    Sure this is all speculation, but this is what I know.
    I have the tech ref manuals (I couldn't find the drive types in there, BTW). It describes a Type A and Type B motherboard. They differ primarily in support for the 80287 co-processor, vs. the 80387. Mine is the older Type A.

    Both use a 32-bit memory interface.

    I used one of these at my job when it was brand new circa ~1986 at STSC. I had the first 386 PC in the place and did the protected mode code for the APL*PLUS PC product.

    Bill

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