15 Dec
2007
15 Dec
'07
3:55 p.m.
On Dec 15, 2007, at 6:09 PM, Tony Duell wrote:
Z80 SIO, at least on the -II and -4.
-Dave
--
Dave McGuire
Port Charlotte, FL
It has an 8048
uP if memory serves and the output is TTL level serial
ASCII. Making it put out parallel would be a major hackup including
reprogramming an 8748.
Or alternatively converting that serial output to parallel using an
external circuit. How hard that is depends on the format of the serial
data. If it's an asynchonous signal, with start and stop bits, a 40 pin
dumb UART chip should do it.
What was used inside the Kaypro to receive the keyboard data?