Incidentally, Tandy/Radio Shack sold a speech/sound
cartridge for the
CoCo. It contained a microcontroller, an SPO256 speech chip and an
AY-3-891x sound chip.
Didn't they sell the SPO256 alone, among all the other single
IC's? I know that even recently I've seen their 'speech chip' on the
shelf but have never bothered to notice exactly who's chip it is.
Jeff
--
Collector of Classic Microcomputers and Video Game Systems:
Home of the TRS-80 Model 2000 FAQ File
http://www.geocities.com/siliconvalley/lakes/6757