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Thread: IBM PC AT 5170 BIOS versions

  1. #21

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    IBM PC 5170 BIOS.jpg

    I've got junk of IBM PC 5170 type 1 motherboard.

    This is very early Type 1 release of IBM PC 5170 BIOS.

    Part No. : 6181024 (16KB) + 6181025 (16KB) = 6181028 (32KB) , 6181026 (16KB) + 6181027 (16KB) = 6181029 (32KB)

    https://mega.nz/#!ngtklAZB!cUw4fTZlJ...ZZp8tnSY9MH9mM

  2. #22
    Join Date
    Jan 2014
    Location
    Melbourne, Australia
    Posts
    550

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    Wow! Can we see the entire board please??
    Bobby.

  3. #23
    Join Date
    May 2006
    Location
    Melbourne, Australia
    Posts
    6,018

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    Quote Originally Posted by fs5500 View Post
    I've got junk of IBM PC 5170 type 1 motherboard.
    This is very early Type 1 release of IBM PC 5170 BIOS.
    Part No. : 6181024 (16KB) + 6181025 (16KB) = 6181028 (32KB) , 6181026 (16KB) + 6181027 (16KB) = 6181029 (32KB)
    Good to see these chips, listed in figure 9 of the document at [here], eventually 'surface'.
    Because of the 16 KB sized ROM's, we expect shunt block U131 to be in the '27128' position (per [here]).
    Also expected, are Intel made 8259A interrupt controller chips.
    Now that we have a photo of the ROM's, I will later add details to [here].

  4. #24

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    @bobba84

    Sure, here it is.
















    @modem7

    Thanks very much.
    Last edited by fs5500; December 5th, 2018 at 06:33 AM.

  5. #25
    Join Date
    Jan 2014
    Location
    Melbourne, Australia
    Posts
    550

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    Thank you!
    Bobby.

  6. #26

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    Silly question - could the unpopulated 16 bit connector positions be populated to give the AT 8 16 bit slots instead of just six?

    tnx.

    g.
    Proud owner of 80-0007
    http://www.f15sim.com - The only one of its kind.

  7. #27

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    Quote Originally Posted by geneb View Post
    Silly question - could the unpopulated 16 bit connector positions be populated to give the AT 8 16 bit slots instead of just six?
    You could do that. But it means you cannot use 8-bits cards any more that only fit in a 8-bits slot like the original IBM CGA video card.
    With kind regards / met vriendelijke groet, Ruud Baltissen

    www.baltissen.org

  8. #28

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    @gene . @Ruud

    I recommend to discuss about non related BIOS topic on another thread.

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