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Thread: IBM PC 5170 motherboard type 2 questions

  1. #1

    Default IBM PC 5170 motherboard type 2 questions

    Talk is about TYPE 2 AT motherboard with 6 MHz CPU, 13.8" x 9.4", BIOS dated on 06/10/85 and 1 bank of 512 KB

    So...What is wrong with this revision of IBM PC AT motherboard? Never saw it nowhere. No pictures on internet, nothing.

    Its really so rare or where is the problem? Any suggestions?
    IBM PC 5150(A): IBM PC 5150(B): IBM PC 5160 (64-256k): IBM PC 5160 (256-640k): IBM PC 5170 (099): IBM PC 5170 (319/339): IBM PC 5140: IBM PC 5162: IBM PC 5155: IBM PC Expansion Unit 5161:
    WANTED!: IBM 5175 monitor, IBM 5145 monitor, IBM PC/XT/AT rear screws, Intel INBOARD 386AT card, IBM 5140 keyboard, very early IBM PC (S/N: under 5000)
    My IBM PC hardware collection

  2. #2
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    Default

    And a photo of the 06/10/85 ROM set would be nice to add to [here].

  3. #3

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    So nobody nowhere?
    IBM PC 5150(A): IBM PC 5150(B): IBM PC 5160 (64-256k): IBM PC 5160 (256-640k): IBM PC 5170 (099): IBM PC 5170 (319/339): IBM PC 5140: IBM PC 5162: IBM PC 5155: IBM PC Expansion Unit 5161:
    WANTED!: IBM 5175 monitor, IBM 5145 monitor, IBM PC/XT/AT rear screws, Intel INBOARD 386AT card, IBM 5140 keyboard, very early IBM PC (S/N: under 5000)
    My IBM PC hardware collection

  4. #4
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    Show us a photo. I know of 2 types of 5170 in a broad sense: the iinm earlier green version, and again iinm the later brown one. My current non working 5170 - but not for long ahahahaha, has a green silkscreen. I prefer that style. It's prettier.

  5. #5

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    Quote Originally Posted by tipc View Post
    Show us a photo. I know of 2 types of 5170 in a broad sense: the iinm earlier green version, and again iinm the later brown one. My current non working 5170 - but not for long ahahahaha, has a green silkscreen. I prefer that style. It's prettier.
    Very funny photo not exist...
    We have only these information
    5170.jpg

    (jesus someone fix finally this prehistoric system of picture inserting)

    So only this information is known

    http://minuszerodegrees.net/5170/mot..._revisions.htm
    IBM PC 5150(A): IBM PC 5150(B): IBM PC 5160 (64-256k): IBM PC 5160 (256-640k): IBM PC 5170 (099): IBM PC 5170 (319/339): IBM PC 5140: IBM PC 5162: IBM PC 5155: IBM PC Expansion Unit 5161:
    WANTED!: IBM 5175 monitor, IBM 5145 monitor, IBM PC/XT/AT rear screws, Intel INBOARD 386AT card, IBM 5140 keyboard, very early IBM PC (S/N: under 5000)
    My IBM PC hardware collection

  6. #6

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    Quote Originally Posted by romanon View Post
    (jesus someone fix finally this prehistoric system of picture inserting)
    Like this?







    capture_001_19112019_074445a.jpg
    PM me if you're looking for 3" or 5" floppy disks. EMail For everything else, Take Another Step

  7. #7

    Default

    yeah!
    IBM PC 5150(A): IBM PC 5150(B): IBM PC 5160 (64-256k): IBM PC 5160 (256-640k): IBM PC 5170 (099): IBM PC 5170 (319/339): IBM PC 5140: IBM PC 5162: IBM PC 5155: IBM PC Expansion Unit 5161:
    WANTED!: IBM 5175 monitor, IBM 5145 monitor, IBM PC/XT/AT rear screws, Intel INBOARD 386AT card, IBM 5140 keyboard, very early IBM PC (S/N: under 5000)
    My IBM PC hardware collection

  8. #8

    Default

    Quote Originally Posted by tipc View Post
    I know of 2 types of 5170 in a broad sense: the iinm earlier green version, and again iinm the later brown one.
    I only have seen the brown one so far so it could be possible that the green one is the wanted one. The only differences are frequencies of various used ICs and crystal. If the 808286 is a 6 MHz one, you could be the one to provide the first photo of this board!
    With kind regards / met vriendelijke groet, Ruud Baltissen

    www.baltissen.org

  9. #9
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    I used to have 2 of these. Now I only have the 3rd. This unit was owned by Chase Bank . These 2 really stupid kids (need it be said, I reside in New Jersey) were carrying it and a Wang 386 out to the curb. So I snagged them. They looked so dumbfounded. And when I say "kids" I mean 18-20 yoa.

    I'll endeavor to remove the board and photo it. I am of the persuasion the green ones aren't necessarily rare. I may even have photos of the 2 I used to own. Believe it or not, and this is just what I was told by yhe Astrophysics Professor that sold them to me, they were housed in tje common area at MIT and were part of the Athena project, which as I understand was where X Windows was developed. The units are long gone, all I have left is a non working 5175 and a PGC card.

    Here's one https://www.ebay.com/itm/IBM-6480188...-/183940762570
    Last edited by tipc; November 19th, 2019 at 11:43 PM.

  10. #10
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    Mar 2017
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    New Jersey, USA
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    I finally got a chance to take a look at some of my ATs, and it looks like I have one Type 1, and two Type 2 systems. (One of the Type 2's might actually be a Type 3 with the label missing, I didn't look very closely at that one). I suspect the Type 2 and 3 motherboards are exactly the same, except the Type 3 has a sticker, a different BIOS, and of course the clock, CPU, etc. are all upgraded from 6MHz to 8MHz.

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