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I recently picked up an old Sperry HT. In it was a card that I had never seen before. A Computer Logics Emulator Card 3003. I've searched the web, and while there were more than a few people trying to sell one, none of them had any information on what it was. It has a Z8530APS-SCC (Serial...

I recently got a NuXT (ya, I know it's not vintage, but it is for all intents and purposes). I pulled a 5.25" 360K floppy drive out of my spare parts box and installed it. The drive works fine. FORMAT shows no errors. SYS A: shows no errors. ATTRIB A:*.* shows all the correct files. But...

So I pulled my Sperry Portable down to play with it and the screen wouldn't light up. It would boot up, but nothing would display. It did work the last time I had it on the table (about 3 weeks ago). I verified that the power supply is feeding a good 12VDC to the video board. A visual...

So my Plus/4 is working nicely. - CPU replaced by a modern replacement (so it's not a soon-to-fail 7501 or 8501). - The Pi1541 issue is resolved (it's so nice to have that working). Now it's time to future proof some stuff - especially since I'm having so much fun playing with it. The TED chip...

I recently picked up a nice (looking) condition Commodore Plus/4 and I've been trying to get it working. I've replaced the TED and PLA. I'm waiting for a CPU replacement. It powers on and I get something on the screen (Commodore 1702 display using the Luma/Chroma inputs), but it sort of looks...

Back story: I'm restoring an old IBM-XT clone and I need to hook it up to a more modern display that only has VGA. So I picked up a MDA/CGA/EGA to VGA converter (https://sites.google.com/site/tandycocoloco/mda-cga-ega-to-vga). It works pretty good. The computer came with a display card that I...

Playing with my Tandy 1400LT, and I notice that when the floppy drive is active, the screen backlight dims a bit. Is that normal? Or should I be checking out the capacitors more thoroughly the next time I have it open? Note that this is on AC power, not battery.

So I'm finally getting around to working on my model 4P. According to what I've been reading, the issue that I have is that some of the RAM is bad. The chips are labelled: 8040665 FQD8446, but 2 are 8040665 TQD8446 My question is: Are those really the same? If I picked up some TQD8446 chips...

So I actually had some time today and I finally got both my Tandy 1100FD floppy drives cleaned up. They both format diskettes without error and I can write and read files without any error. I have a USB/Floppy drive that I picked up at a garage sale, but when I try to read the diskettes...