Recent content by Kevin Williams

Hey Everyone, I was wondering if anyone happened to have a Remex 9000 "The Director" tape drive? I have one that I can only guess I somehow touched the DB7 data pin to the nasty 26.4v DC line. I don't recall doing it, but the drive was working, I had the expansion card out (building my own)...

Thanks so much! I had read that before, and your explanation definitely helps. I guess it just pulses once when the write is done? I'm not sure how to hook this event in code, will have to read a bit... This seems an odd way to handle what is essentially an interrupt, but I guess it is just...

Hello Everyone! For many months this year, we have been working with David Murray, The 8-Bit Guy, to design the motherboard for his "Dream Computer". This machine is now known as the Commander X16. David originally posted a video on this project back in February 2019. Part 1 of the...

Hello, I'm ready to make your day! I hope at least. My wife and I are lucky enough to only be about 1.5 hours away from Computer Reset in Dallas, TX, and I was going through some of the stuff we picked up and I found a QuadColor I + QuadColor II in the box, with disk and docs! The card...

Hello Everyone, I have a couple of Victor 9000 machines which I picked up without keyboards or monitors. I was lucky enough to snag two keyboards from eBay, but no luck on the monitor. I know it runs a 640x400 mode, but I cannot find any specs on the clock rate, or scan rate. I can't even...

Hey Everyone, I recently made a cool find in the form of a Litton ABS Model 1601 Processor. I found info online about machines in this series, and it seems to be a small office accounting style device. I also received a bunch of paper tape for it with programs like general ledger, etc...

Hello Everyone, I have an old keyboard that I was wondering if anyone could identify? I listed in on eBay today as I've had it for several years now, and I really don't think I'll ever get around to doing anything with it. However, I'm still very curious what it's original intention was...

Hi Hans, I am actually trying this on a Model 4 non gate-array. I socketed the 245 so when we ultimately sell these, it will be easy for folks to switch it to a 640 if needed. I just used a vanilla LS-DOS boot disk, no config on it at all that is not meant for the FreHD, and copied the...

Hello Everyone, I was wondering if anyone had the schematic for the Orchestra 90 for the Model III & 4? Not the CoCo version, I've already seen that one in the manual but haven't been able to find the other one. I read the saga of the gerber files, and I'm most certainly NOT looking for...

Hi Everyone, As many of you may know, James Pearce has licensed several of his boards to our store and we recently worked with him to offer the Lo-Tech TRS-80 IDE adapter. We finally got our PCBs in and we built several out. Before we list them however, I was planning to test them...

Hello Everyone, My name is Kevin Williams with TexElec.com. We are happy to introduce our newest card, the Resound OPL3 4 Channel card! Our board uses a Yamaha YMF262 (OPL3) chip and a little known feature to support 4 Channel output. While there are no games that support the extra two...

Hi Everyone, I know this is not specifically an S100 question, but it is 8" floppy related so I was hoping this would be the best place. I recently picked up what I thought were 4 Shugart SA-801 Floppy drives, but it turns out I have two labeled 900-1. The primary difference I can see is...

Hi Everyone, Well, I'm stumped, and I was hoping someone might be able to point me in the right direction. I bought three Kit B FreHD's about 1.5 years ago and built them all out. One worked right away, and another worked with a little SD card soldering fixes. The third however, never...

Hello, I made a dumb-a$$ move! I was trying to hook +12v to a 26-3022 FDC controller to make it work on my COCO2, and without looking more closely, I accidentally wire +12v to PIN 3! This seems to have fried the CPU in my COCO2, so I ordered one on eBay. However, I was trying to track...

Hey Everyone, I have a few 5170's I'm working on and I hit a really weird issue. I am trying to use a 128mb DOM IDE module on a 16-bit IDE card with the AMI Bios in a 5170. I was able to make the chips, and it's coming up fine. The module I'm using has a geometry of 492 Cylinders, 16 heads...