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Interfacing ISA video card

Discussion in 'Electronic Design' started by Charl, Jul 11, 2004.

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  1. Charl

    Charl Guest

    Hello folks,

    I am working on a Z80 system. I want to exploit the Z80 to the max
    (write a console-based OS for it, at least). I can of course use a
    HD44780-based LCD, but these buggers aren't all that large. Now, I was
    wondering whether it would be possible to interface an old ISA video

    I can use Linux driver sources to figure out the registers and things
    like that (as long as I have a compatible card). I was just wondering
    if anyone has experience or ideas for this?

    - Charl
  2. Norm Dresner

    Norm Dresner Guest

    Try asking on Comp.OS.CPM

  3. Rich Grise

    Rich Grise Guest

    I used to have a book on interfacing to the ISA bus, and as long as
    you have the spec, it should be a snap. Address, Data, MEM/IO, READ/WRITE,
    and some kind of CS, and you're home free. I forgot the actual bus signals -
    one implementation had 4 separate lines for mem and io read and write; Which
    is used on the ISA is, of course, left as an exercise for the student. ;-)
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