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can anyone identify this card/component

Discussion in 'Electronic Design' started by sanjaya, Jun 3, 2004.

  1. sanjaya

    sanjaya Guest

    i got a card from ebay which claimed to be a networking card for apple
    ii.

    i uploaded a image and info gathered from various groups to
    www.geocities.com/pererasanjaya

    we have difficulty in identifying the following chip and its
    function...

    Innovations in Computing
    310-6206-001
    8936

    IC is in the right-middle position of the card. card only has a RCA
    out.

    on the back of the card, it says
    Innovations in computing, Made in USA, Copyright 1989

    it would be great if someone can give comments on this card/chip and
    the company or its successor....

    any comment is grately appreciated.
    sanjaya
     
  2. Did you probe the ROM? Check $Cs00 to $CsFF where s is the slot number.
    Also try hitting $Cs00 then dumping $C800 to $CFFE to see if a 2K ROM
    bank swaps in. It's not uncommon for a text comment to be in there.

    A real catch would be to find a ProDos driver or DOS 3.3 RWTS hack in
    the 2K ROMs that mounts a remote filesystem. I once saw this at a
    university for a 5MB shared network drive. Try the obvious PR#s/IN#s or
    examine the $CsXX for jumps into the 2K ROM bank.

    The 2K ROM is shared so be careful to not activate other cards during
    your examination.
     
  3. sanjaya

    sanjaya Guest

    Thanks , i will try to see the ROM dump....will post on the net also.

    I would like to know bit more about the apple network you saw..
    is it a ethernet card or workstation card for apple ii. It seems that
    all the software required for network access was in the ROM, did I get
    it correctly..
     
  4. Thanks , i will try to see the ROM dump....will post on the net also.

    I would like to know bit more about the apple network you saw..
    is it a ethernet card or workstation card for apple ii. It seems that
    all the software required for network access was in the ROM, did I get
    it correctly..[/QUOTE]

    That was almost 20 years ago so I don't remember much. I think it
    patched into the DOS 3.3 RWTS interface and used drive numbers to select
    partitions. I don't know if that was purely ROM or if it ran a custom
    DOS 3.3. DOS 3.3 was so grossly inefficient that anybody with assembly
    skills had their own home-brewed version.

    I know nothing about the server. This was in an after-school
    electronics course for high school students. Neat-o hardware like the
    server had to be locked up to keep people like me from taking it apart.
    The teacher was disturbed enough that I could read the 6502 assembly of
    an operating system like a newspaper.
     
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