Mark Blair (NF6X) designed Cartridge boards for both the Tandy Color Computer, and the TS-2068 Computer. I ordered some of each. The bare PC boards from OSHPark arrived yesterday. I built one of the TS-2068 up today, and will be testing it with a Spectrum Emulator EPROM and an OS-64 EPROM (I have ten of these chips from Zebra Systems, and have permission to make more. OS-64 give a TS-2068 a 64 column screen.) I had to order a bunch of boards to get a decent price. You have to buy three at a time from OSHPark. In that quantity, they come out to a little under $19.00 each board. So, I have a few extras. If anyone on the list is interested in a TS-2068 Cartridge board, I can offer single bare boards for $20.00 including shipping in the Continental U.S. Only. Add $5.00 more for a kit of all the parts to build one up. I haven't determined the price for a board built-up with OS-64 or a Spectrum ROM yet. But it looks like it will be around $35.00 shipped. You might want to build your own, as my soldering skills are far from expert and I'm sure there are many on the list who do cleaner work. I can ship bare boards, and kits now. Built up boards will take me a little time to make and test. https://oshpark.com/shared_projects/6ihON5Uq CoCo Cartridge Board: https://oshpark.com/shared_projects/aMK1Ekos I'm using the Coco Cartridge board to make an HDBDOS cartridge to boot Drivewire (use a PC/Mac/Linux as a disk server over serial cable) without needing to CLOADM a wave file with the software. Eventually, I'll dig up my Coco Disk Controller that can switch between two ROMS, and have one be a standard Coco Disk Extended BASIC, and the other HDBDOS. Since there are separate versions for the Coco 2 and 3, Mark helped me make up a file with both versions so I can bank switch between them using a 27128 EPROM. -[ Al ]-