On Tue, 10 Jun 1997, Allison J Parent wrote: After the collapse of the market for the TI 99/4a, Radio Shack sold many of the parts (including the keyboard, the internal switching power supply, and the RF modulator/switchbox) separately as surplus items. At one point in time, I replaced the membrane keyboard, overloaded 7805, and abysmal RF modulator in my ZX81 with surplus TI equivalents. With a heatsink on the ULA and a wobble-free RAM expansion, the ZX81's uptime was enough to make the average Win95 user jealous. Not that that's saying much, though. -- Scott Ware s-ware(a)nwu.edu ware(a)interaccess.com