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Thread: Jumper setting for SCSI 40MB IBM SCSI drive (ex Mac classic II)

  1. #1

    Default Jumper setting for SCSI 40MB IBM SCSI drive (ex Mac classic II)

    Hi,

    I'm wanting to add an external SCSI drive to my recently acquired Apple IIGS. I have the card, an external SCSI drive case with PSU AND an old 40MB drive ex. a Mac Classic II I had lying around.

    However, one thing I don't have is information on the jumpers on the drive. Does anyone have a manual or know what the settings are. The Drive is an IBM WDS-L42C1. The jumper block (J2) looks like this...

    +.+.+.+.+.+.+
    ...|
    +.+.+....+.+.+

    The second set of pins has a jumper across them. I'm assuming it's set to SCSI 0 as that's what it was when it was in the machine. However it would be good to know what all those pins do in case there are any issues. This is the only set of jumper pins I can see on the drive. Thanks.

    Tez
    ------------------------------------------------
    My vintage collection: https://classic-computers.org.nz/collection/
    My vintage activities blog: https://www.classic-computers.org.nz/blog/
    Twitter: @classiccomputNZ ; YouTube Videos: (click here)


  2. #2
    Join Date
    Apr 2005
    Location
    Stevens Point, Wisconsin
    Posts
    2,315

    Default

    I think a L42C1 is just a
    http://stason.org/TULARC/pc/hard-dri...-SCSI1-SE.html
    with the Apple ROM
    patscc

  3. #3

    Default

    Quote Originally Posted by patscc View Post
    I think a L42C1 is just a
    http://stason.org/TULARC/pc/hard-dri...-SCSI1-SE.html
    with the Apple ROM
    patscc
    Thanks. I saw that site before I posted but couldn't make sense of the jumpers. However, now I have a closer look perhaps they do make sense after all. I'll do some experimenting tonight.

    Tez
    ------------------------------------------------
    My vintage collection: https://classic-computers.org.nz/collection/
    My vintage activities blog: https://www.classic-computers.org.nz/blog/
    Twitter: @classiccomputNZ ; YouTube Videos: (click here)


  4. #4

    Default

    I experimented and sure enough, that link pointed to the right jumpers. It took me a little while as I discovered I was numbering them from the wrong end (-:

    Thanks

    Tez
    ------------------------------------------------
    My vintage collection: https://classic-computers.org.nz/collection/
    My vintage activities blog: https://www.classic-computers.org.nz/blog/
    Twitter: @classiccomputNZ ; YouTube Videos: (click here)


  5. #5
    Join Date
    Apr 2005
    Location
    Stevens Point, Wisconsin
    Posts
    2,315

    Default

    Glad it worked. It does have an Apple ROM on there, somewhere, right ?
    patscc

  6. #6

    Default

    Quote Originally Posted by patscc View Post
    Glad it worked. It does have an Apple ROM on there, somewhere, right ?
    patscc
    Unsure, but it did come from a Mac Classic II and was working. I've sealed it all up now in it's external case (plus I'm not at home) so I can't take a look.

    Tez
    ------------------------------------------------
    My vintage collection: https://classic-computers.org.nz/collection/
    My vintage activities blog: https://www.classic-computers.org.nz/blog/
    Twitter: @classiccomputNZ ; YouTube Videos: (click here)


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