Hello,
just wondering if anyone has information about the PD-001 ISA card
http://matthieu.benoit.free.fr/133.htm
I got it long time ago from an electronic surplus, and have still not be able to know for what this card is for
thank you for any hint,
Matthieu
here a photo of the same card found with a 80286 Motherboard.
note : 1 bipolar prom is missing.
matthieu.benoit wrote on 2023-07-13, 14:10:just wondering if anyone has information about the PD-001 ISA card
Interesting card. It does not care about the data lines, only address lines A2-A9 which is typical I/O port range on a PC. And seems to only use IOR and IOW signals (plus AEN) as well as CLK and it has some counter chips.
It could be some sort of auxilary address decoder for another card, or some debug card, or perhaps some control card but frankly it would be easier to just have 8255 with simple port decoder in that case and this card even uses PROM chips.
Your best bet would be to try and draw a schematic for it.
Could it be some kind of hardware copy protect device maybe (used by some particular software)?
Interesting ! Can you take a picture of the back ?
Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun
sorry for late answer , attached a photo of the solder side,
Matthieu
Horun wrote on 2023-08-08, 02:35:Interesting ! Can you take a picture of the back ?
Welp...
If i'm counting it right. no databits are used on this card.
the only pads in use are...
AEN, A2-A9, GND, RESET, +5V, GND, IOW, IOR, CLK, +5V, OSC, GND
and I have no idea what it's use is. 😁
I don't see any way it can deliver data to the computer, though the computer might control the card by selecting the correct addresses.?
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