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Thread: Setting Switches on an 8-bit Video Card

  1. #1
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    Default Setting Switches on an 8-bit Video Card

    I have an 8-bit video card with 15-pin and 9-pin sockets, and 6 configuration switches on the faceplate. It is a Trident TVGA 8808RB. It is populated with 8 64k-10 memory chips. 6x6 means it has 36 possible configurations. Most of the time when I run across cards such as this I leave the switches as is and if they don't work either see if there is some info on the I-net or simply put them aside. From what I've been able to glean it's capable of VGA or EGA(how is a half-length card able to do what traditionally required a full-length double card ?). I would like to be able to use it in an 8-bit box mainly because of the video memory but also for it's possible capabililities. There used to be a site that had switch settings for numerous cards but I wasn't able to find it. Does that ring a bell ?

    Does anyone know about this card ?

    Thanks, Lawrence

  2. #2

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    Try this site:

    http://www.peteweb.com/ftp/mirrors/hardware_specs/


    Not very "user-friendly" but I got the hang of it pretty quickly. A hint, filenames that end with t.htm are text, alphabetical by manufacturer.

    EDIT: just had a quick look, no listing for Trident. The files ending with i.htm are pictures, may have to id your card that way.

    Kent

  3. #3
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    36? (Actually, 64 or 2^6). C'mon, L...you should be able to work that out in less than an hour-or-so by trial & error...

    64K isn't much for VGA, but it certainly doesn't require 16-bit (or 20, 24, etc) addressing.

    --T
    Teach your children how to think, not what, and hold 'em close, not tight.
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  4. #4
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    OK, Heh Heh Heh. My quick maths told me that 6 switches would give 36 possible configurations. I must admit my maths has gotten pretty rusty. When really pressed I use a calculator. 6 switches with 2 states won't compute easily on my aged mental processes. I just tried to calculate 2^6 mentally and failed. I arrived at 128. Whatever. Put a monitor on it and go thru the possible combinations until it works, hoping it won't blow the monitor on the way.

    In any case any 8bit VGA video card with memory is a plus.
    Hell I've only got 1 meg on the box I'm presently using.
    It chokes on any serious graphics.
    Last edited by Micom 2000; May 24th, 2006 at 05:33 PM.

  5. #5
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    Starting from one, (any number raised to the zero-power is one, right?), my 'powers of two' (as best as I recall) are: 2,4,8,16,32,64,128,256,512,1024,2048,4096, (I get lost somewhere around here), etc.

    --T
    Teach your children how to think, not what, and hold 'em close, not tight.
    _____________________________________________

    Please visit the Vintage-Computer Wiki. Contributers welcome.

  6. #6
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    6^2 = 36, 2^6 = 64 so Lawrence only put the numbers in the wrong order.

    Are you sure it is not a Trident TVGA 8800BR (you wrote 8808RB) ? In that case, a jumper and the first four switches selects analog or TTL mode.

    http://artofhacking.com/th99/v/U-Z/50080.htm
    Anders Carlsson

  7. #7
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    Quote Originally Posted by carlsson
    6^2 = 36, 2^6 = 64 so Lawrence only put the numbers in the wrong order.
    I knew that, I just couldn't resist the opportunity to razz Lawrence a little (not that my math skillz are all that great either)...

    --T
    Teach your children how to think, not what, and hold 'em close, not tight.
    _____________________________________________

    Please visit the Vintage-Computer Wiki. Contributers welcome.

  8. #8
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    Bingo !! That's gotta be an earlier version of the same card. It is labelled TVGA8808RB. Why they reversed the BR must say something. A good starting point rather than going thru 64 possible combinations. I'll have to explore the site

    Thanks Carlsson. Got to give credit to the logical nordic mind.

    My mother was born in the US of Danish(Larsen) parents.
    I've always considered myself as a token Scandinavian.

    Raping and pillaging was only recreational for most Vikings. :^))

    Lawrence

  9. #9
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    Sure, go ahead kid. Just remember your not yet admitted to the "Old Fart" club. Your not even a category 1 junior old fart.

    L

    Quote Originally Posted by Terry Yager
    I knew that, I just couldn't resist the opportunity to razz Lawrence a little (not that my math skillz are all that great either)...

    --T

  10. #10
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    Whaaa...??? Doesn't my mental condition rate me an 'honorary' membership?

    --T
    Teach your children how to think, not what, and hold 'em close, not tight.
    _____________________________________________

    Please visit the Vintage-Computer Wiki. Contributers welcome.

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