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Thread: IBM 9595 Motherboard

  1. #21

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    Quote Originally Posted by g4ugm View Post
    Doesn't the BT646 have support for > 1GB? I have one on my PC Server...
    Yes, it does, for BusLogic formatted devices. But it is a thing that a format from a Corvette might not make an Adaptec controller happy. In the case of the BT-646,

    http://ps-2.kev009.com/ohlandl/SCSI/....html#0709_ADF
    1Gbyte Translation See the following section for more details
    Change CHS per track to support drive capacity > 1 GB

    SCSI Parity Checking - The host adapter will check SCSI Parity if 'On' Needs to be ON for PS/2 systems.

  2. #22
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    Quote Originally Posted by ardent-blue View Post
    Yes, it does, for BusLogic formatted devices. But it is a thing that a format from a Corvette might not make an Adaptec controller happy. In the case of the BT-646,

    http://ps-2.kev009.com/ohlandl/SCSI/....html#0709_ADF
    1Gbyte Translation See the following section for more details
    Change CHS per track to support drive capacity > 1 GB

    SCSI Parity Checking - The host adapter will check SCSI Parity if 'On' Needs to be ON for PS/2 systems.
    oops i had forgotten that... the BT646 set up warns about that when you enable/disable the option...
    Dave
    G4UGM

    Looking for Analog Computers, Drum Plotters, and Graphics Terminals

  3. #23

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    Quote Originally Posted by ButINeededThatName View Post
    It sounds like your system doesn't have the original planar then (if it is in fact a 9595), as that coupled with the board's FRU means it's an 8595 planar. One more quick question; On your operator panel, does it just have a power LED and the power switch on the right side with the display on the left? Or does it have both a power, hard disk LED and power switch on the left side with the display on the right?
    The early 9595's had the single planar as the base system board.

  4. #24

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    Quote Originally Posted by ardent-blue View Post
    Pull CR-2032. Move > J16 < to other outside pin. Pull BT-646 [plenty of frugal Corvettes around]. Pop battery in. Boot w/refdisk. It might / should come up in system programs. Toggling J10 forces system to use refdisk instead of saved configuration.

    My suspicion is that either you chose an incompatible format [>1GB non-DOS or whatever] or BT-646 is mega-dorked? Report on Firmware / SCSI BIOS chips, like 3.38 / 4.70
    Alright, moved J16 to other set of pins, pulled battery, powered on, still no POSTing. Put jumper back, battery in, still nothing. BT-646 has 3.36 on the left two chips and 4.70 on the right two.

    I did both power ons without the BT-646 in.
    Looking For:
    IBM PS/2 9595 Motherboard
    IBM PS/2 Floppy Drives & Cables
    MCA sound card
    IBM PC Server 720/others

  5. #25
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    Quote Originally Posted by Culbrelai View Post
    Alright, moved J16 to other set of pins, pulled battery, powered on, still no POSTing. Put jumper back, battery in, still nothing. BT-646 has 3.36 on the left two chips and 4.70 on the right two.

    I did both power ons without the BT-646 in.
    Sorry, it fails without the BT-646?

    According to

    http://ohlandl.ipv7.net/SCSI/Buslogic_BT646.html

    those are the latest versions of the Firmware anad SCSI BIOS...
    Dave
    G4UGM

    Looking for Analog Computers, Drum Plotters, and Graphics Terminals

  6. #26

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    Quote Originally Posted by g4ugm View Post
    Sorry, it fails without the BT-646?

    According to

    http://ohlandl.ipv7.net/SCSI/Buslogic_BT646.html

    those are the latest versions of the Firmware anad SCSI BIOS...
    Yep, fails without the BT-646.
    Looking For:
    IBM PS/2 9595 Motherboard
    IBM PS/2 Floppy Drives & Cables
    MCA sound card
    IBM PC Server 720/others

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