Date   : Fri, 02 Dec 1983 11:16:15-PST (Fri)
From   : ihnp4!ihuxq!covert@ucb-vax
Subject: Wanted:zx-81 as a controller

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