First post, by FAMICOMASTER
As some of you may know, I'm working on a Turbo XT machine. I've got some color monitors coming in the mail, and I thought I'd give them a try.
There's just one problem: I don't know how to set up some of my EGA cards which I plan to use.
I've got an early revision ATi EGA Wonder that I'm going to use in my turbo AT with the nicer of the two color monitors, until I can pick up a period-correct "CTX" VGA monitor I saw at a local junk store. I know they still have it, it hasn't moved from it's spot in 10+ years, I'm going to offer them a fairly low amount of money for it and see what happens.
I've got *several* other EGA cards though, many unbranded, a couple Video7, a couple Cirrus Logic... All from the same junk store. They had a box of them and I bought the whole thing, cardboard box included. $10 makes me think it was a steal. I've been able to "identify" many of these cards and set their jumpers, but I want to use this one particular card with my XT.
It's an unbranded card, I know it's EGA because it has the Chips & Tech PC82C43x EGA chipset onboard. It came out of an XT clone with the same motherboard, so there should be no trouble using it in this machine.
It's got a bank of 6 switches (SW1), two 2 pin jumpers (P4 and P5), three 3 pin jumpers (P1, P3, and P6), and a 6 pin jumper (P2) labelled "L1 L2 L3," which I assume is the parallel port address. It has the 32-pin EGA feature connector, a light pen connector, the 9-pin TTL video connector, and a 25-pin Centronics parallel port.
I would love to use this card in this machine, it's period correct, it's using a clone chipset, just like the motherboard, and it's got all the features I want. I just need to set the switches and jumpers so I can test it first with my monochrome monitor and then use it with my CGA monitor.
Here are pictures of the card, front and back:
The only markings on the board itself are: "P.C.C." in the lower center, "PCC114058" on a sticker to the left of that, "MADE IN TAIWAN R.O.C." in the top left, "UNITECH 0001" on the bottom right on the back, and "8707" above that. I'm pretty sure this is a date code.
"Unitech EGA" doesn't bring up anything meaningful on Google, and no such entry exists for it on TH99. I looked through every single listing under 8-bit ISA video cards. All of them, not just EGA, and found nothing similar enough to configure this. Apparently EGA cards with parallel ports are exceedingly uncommon. All the more reason to figure this one out and use it.
I would be happy to provide any additional information about the card that I know about. Thank you in advance.