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Computer Circuit Board Identification request Answered

Here are a few pictures of two boards I have (I am not sure how old they are, but they either came from my old 8088/8086, 286, 386, or my PS2 (all long gone now).
What I need to know is what they are/were and are there any specs out there (I can't seem to locate any): one has a port on the side, one does not. The one without the port has a T.I. chip that looks like an IR programmable PROM
with PGM=12.5 v on it. There is also a crystal with 24.000 stamped on it.
The other one it probably an old video card but it has only 4 resistors on it and one resistor bank, plus four capacitors, and two ic's. One is labeled: 74LS245N ( Octal Bus Transmitter/Receiver designed for 8-line asynchronous 2-way data communication between data buses ), the larger IC is an unmarked 40 pin device.

I tried for half an hour to get half decent pictures of them, sorry for the quality.


I would surely identify those as bombs. You should know better than to post pictures like that on the internets - they have lists for things like this!!!


I agree with LV -- ironically, I was doing a bit of research on serial interfacing :p

They do look more like a bomb than a breadboard with some LEDs attached to it *LOL* ;-)

LOL We should go post that on toystore websites :D

What use are these old ISA cards? L

Yeah, that would be my next question....can I use them for anything... :-)

Probably only useful for salvaging components, unless you have a very old motherboard with ISA slots.

Well, I think I still have an old 286 in the back room, do you think that would? I haven't had it out for years, it may not even boot anymore.

Yeah probably would have. Worth checking. You could maybe even put a tiny Linux install on it and run it as a server of some kind.

Try the comments here for ideas.

I've got PCI cards which I'll probably never use again... (don't know) L

Great ! Thank you NM, and LV (and for the reference I may need in the future, CS).

The board with the 9 pin D-connector is a serial driver card, probably for an external modem or serial printer. The jumpers define the IR (Interrupt Request) addresses to avoid confict with other Serial/Parallel port hardware. The card with the DIP (Dual Inline Pin) connector is a CD ROM driver card. Before IDE became a standard there were various versions of drive cables and many came with their own interface boards. The fact that it has a 34 pin connector rather than IDE's 36 pins confirms this. The pair of jumpers select between two different models of drives.

Sorry... My mistake... The pair of jumpers are to select between two I/O address spaces; CAXX or CCXX. They are standard I/O addressing for a PC in the base 64K memory space. The jumpers allow using two cards in the same PC.

Hmm, does that sound like it might belong to my old 8088 ?

. I think what you have are ISA (predecessor of PCI) bus cards. ISA was the bus du jour for the 8088, 8086, and the first few generations of 80x86 computers. Up until a few years ago, most computers had a legacy ISA slot - similar to floppy drives, they're not as common, anymore.
. HowStuffWorks has a nice little article on PCI that mentions ISA.

If either of them has an FCC ID number on it, you can look up who made it and what it is. Google for "fcc id search" and you'll find a host of sites that allow you to identify an electronic device by FCC ID. Those databases used to come in handy when you had to find drivers for ISA cards without manufacturer or model info on them.

The one board is unmarked, the other is marked only with: GW303C and that does not appear to be an FCC ID.

. I agree with LV on the card with the connector - probably a serial I/F. DB-9 is common for RS-232, &c.
. Are there any markings near the jumpers? Eg, IRQ, COM, 2/3,8/9.
. No idea on the other card. LV seems to be pretty knowledgeable about such things, so CD-ROM I/F sounds good. I did a search on GW303C and all I came up with was wireless CCTV.

Jumpers are numbered 2345 down along the left side, and a 1 & 0 left to right along the bottom. So, I guess these puppies are a bit out dated/out moded ? Thanks for all your help everyone.

. The jumper probably handles COM port selection; COM2-COM5. . If you have a slot that the serial card will plug into, it might come in handy for a project. . I've never tried a FCC ID search, as suggested by capt_skinny, but it sounds like a good way to track down data sheets.

Well, on this one with the RS-232 on the card, there are no other markings (other then identifying resistors, caps, etc. except for: MADE IN TAIWAN R.O.C. I can't even identify the 40 pin IC (although the 20pin 74LS245N is pretty common).