covert@ihuxq.UUCP (covert) (12/02/83)
I have an application for a microprocessor based controller and would like to know some things about the sinclair zx-81: 1)How much RAM,ROM is avialable? 2)Can standard 2732/2716/2764 EPROMS be used in it? 3)How easy is it to interface to?? 4)Does it have any real-time interrupts? (I want to implement a soft-ware clock with it). 5)How is the doc?? Any good books?? 6)I plan to write my control program in z-80 assembly, are there any defined entry points to the io in it?? I had originally planned to buy a STD-buss z-80 card but they run about $300, and i think that i can get a zx-81 for under $100. The nice thing about staying with a z-80 based controller is that I can used my cp/m system to develope the software for it. Has anyone used a zx-81 as a controller?? If so please respond by mail. Thanks in advance . -- richard covert ihnp4!ihuxq!covert