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While browsing on eBay, I've looked at two identical model laptops and one has a very dark uniform blue screen when not turned on (left picture). The other has a blue outlined screen that does not look too great (right picture). I've seen this many times before but assumed the right laptop...

I have a NABU 1600 8086 based computer that should utilize a Tandon TM100-4 drive. It runs CP/M 86 and QNX and I have disk images from Dave Dunfield's site. This computer doesn't have the mass storage unit (including the floppy drive) so is it easy to emulate a Tandon TM100-4 drive (96TPI) on a...

Before I remove these from my eBay watch list, this was sad to watch. Both of these SWTPC items sold on the same day. Both were full auctions with two different sellers. This SWTPC CT-64 sold for $400 with one bidder. The keyboard for the same SWTPC CT-64 sold for $860 with multiple...

Would anyone happen to have any cassette software for an IESI Datacorder II? It's actually a pretty cool Z80 computer with a full keyboard or input, a 1 line 40 column display and printer for output and a cassette unit for storage. Problem is, it expects runnable code from cassette, and...

Before I go down a rabbit hole, I thought I'd ask for some advice. I have a Telcon Zorba with Canon MDD-210 48TPI drives. The Zorba works. I have a working floppy diskette I made from an archived copy and I have an original boot disk that will boot but has an error if I try to make a copy...

I am not familiar with these computers but I recently got an Olivetti M21 because it's a very cool looking portable. It boots up to a certain point (stops at the NPU test) and then never goes further. This M21 does have an MFM hard drive (ST-225) and does some initial seeking, then that red...

I've had multiple people ask me for pictures of the Nabu PC floppy disk controller (FDC) board so that reproductions can be made. I was a little hesitant to let too many people have pictures because for one, I cannot get mine to work yet and two, there would be duplication of work. I have been...

I have a Nabu PC that I've gotten disk images for. It runs CP/M 3.0. I've been trying to write out the disk image and it seems I am successful as I used the original 180k SSDD drive on a PC to write it out with IMD. I can read it back, dump both images and they compare correctly. I'm not sure...

I acquired a SuperPET sometime ago and I've been trying to fix it but this one is a little weird. I've removed the BMB board and the Computhink boards and am focused on the 8032 board at the moment. I know the monitor works fine as well as the power supply because if I put in another 8032...

I've had a bit of an adventure lately and I'm not done yet. After acquiring a Commodore 900 last year I finally had the time to look into it. Being that it was originally from Germany, the power supplies were supposed to be 240v but the previous owner did some work on them and thought the...

I just acquired a Tandy 2000 and was a little surprised when I saw it come up with 896K in the eBay ad but didn't see any extra memory interface cards. I popped out the motherboard and found the Envision Designs 896k memory upgrade and the 8087 Math coprocessor upgrade. I figured someone here...

Has anyone seen a modular enclosure like this for the Rockwell RM 65 Family? I purchased this on a whim as the seller also had two AIM 65s and it certainly looks interesting. It was noted as a "Rockwell RM 65 Development Control System" but the seller was selling for his late father so doesn't...

I acquired this a few weeks back. It looked curiously like a computer but I don't think it is a computer but perhaps a peripheral tester or possibly a rack-mount front panel. Does anyone know what it might be? I have further pictures at http://vintagecomputer.ca/computer-systems-computer/...

I am not familiar with Prolog or if they had a standard 56 pin bus but can anyone tell me if this is a Prolog board? I found The Designers Guide to Programmed Logic For PLS400 Systems on Bitsavers and this card looks like PLS-401 "Single Card System" but it doesn't specifically mention of the...

Hi All, I have Dwight Elvey's KIM-1 debug board and I have a Rev D KIM-1 that passed the CPU test but fails on the memory test. Oddly enough, the memory test pattern is short-long-short-long-short-long-short-long where "short" is a bad RAM chip and "long is a good RAM chip. I can replace the...

I'd love to know if there are any other collectors out there with an MCM/70. Just thought some of you guys might appreciate a quick picture or two after unpacking it. It needs a good cleaning still. It is non-functional but I was expecting that. They are just not easy to find.

Hello, I have two CBM 8250 dual floppy drives and both had bad ROMs. Luckily, one had a bad 901887-01 (UL1) and the other had a bad 901888-01 (UH1). I was able to get one drive working properly. I recreated both of the ROMs with two MCM69766C EPROMs but they don't work. When turned on, the...

Would anyone happen to know where I could download a set of CD images for the Tandy Sensation II? The CD's are available for the Tandy Sensation I online but not the II. I have been able to hack the Sensation I CDs to get most of the stuff to run with updated drivers for the video card and...

I recently acquired an F8 based system from "CPU Systems" called the CPU-8. It has an expansion bus but sadly, I am missing the RAM card so I'll probably have to try to reproduce it at some point. Luckily I have some documentation but it's not complete. For reference, here are some pics...

Forgive me if this is a basic question but I have a Tiger Learning Computer (TLC) that is missing the mouse that goes with it. It has a PS/2 connection but a PS/2 mouse *partially* works. As I keep moving it around and clicking buttons, sometimes the mouse will travel vertically down and...