On Mon, 2 Jun 1997, George Lin wrote: This reminds me... I also have a Z80 cartridge for the C64. But it's not the one from Commodore. It's from a company called DATA 20 Corporation. I haven't been able to get it to work. It has what looks like a connector for a power supply on the back, but I didn't get the PS with it. It also came without any disks, though it did have a cassette in the box with it, which says "Use side A for Commodore 64/Use side B for VIC 20". It's a Z-80 Video Pak, that combines the Z80 processor AND an 80-column display adapter into one (big fat) cartridge. To quote from the box: The Z-80 Video Pak brings the convenience of an 80 column screen and the power of a CP/M compatible operating system to the Commodore 64. Designed to be used with a monitor, the Z-80 Video Pak lets the Commodore 64 owner switch to a 40 or 80 column screen in black and white, or back to the standard color screen. All switching is done through software and no cables need to be moved. The Z-80 Video Pak has its own Z-80 microprocessor and operating system which allows the 64 to run CP/M software formatted for the Commodore 1541 disk drive. A Terminal mode which brings communication with central data bases is included at no extra cost. The Z-80 Video Pak also supports the advanced screen handling features of all Video Pak models such as erase to the end of line, erase to end of screen, and dump screen to printer. If anyone out there knows this thing's power requirements (AAAGH! Another wall-wart!) and where to get CP/M disks in 1541 format, please tell. :) Doug Spence ds_spenc(a)alcor.concordia.ca Hi you lot in the USA. I have a Boxed CPM cart and Disk Commodore