Re: Mystery (RGB?) card

[schmidtd <schmidtd@my-deja.com>]

On Feb 7, 12:24 pm, A2Aviator <a2avia...@gmail.com> wrote:
> Heh, cool.
>
> ..you have the cable, too. I just have the card.

The pinout of the cable is straightforward:
DE-9 - Header
GND - 1
2 - 2
3 - 3
4 - 4
5 - 5
6 - 6
7 - 7
8 - 8
9 - 9
NC - 10

> The two bank dip switch and with you having that cable, the 9 pin
> makes it suspect for a video card from physical appearance.

That was my suspicion as well.

> Look at the pots, see where they go to on the header, and see if they
> fit into where pins 3,4,5 and 8,9 are on the 9 pin.

Not directly, as far as I can see.  Much is obscured by the header
connector, though.  Most of the pot connections feed into the logic on
the boards.

> I never did dump the ROM and see what it might have eluded to being.
> Heck, sometimes there'e even ASCII that gives it away. D'oh! Gonna
> have to find it and see about doing that.

When I view the ROM space, I get somewhat random values - they follow
something of a pattern, but change each time I read them.  In slot 4
(on an IIe), every 8th byte starting from C400 seems to be BF.  Every
8th byte starting from C401 seems to be FF.  After that, there are a
lot of 00 and A0 values; but a lot of random values too.