Hi,
I've got a few old SC/MP-II chips and I decided to try and do something with them.
It appears that only 2 of the chips actually work, but I've just proto-typed a small
system with 4K ROM, 4K RAM, an 8251 USART and an 8255 PPI. I got the
comms going yesterday and the PPI is fine. Excellent old vintage stuff.
I forgot how cumbersome the SC/MP instruction set was, but it's fun trying to
code around its deficiencies. I've got a listing of the original KITBUG for the
SC/MP, but I'm going to expand on it to provide more functionality. I'll try and
base the monitor off the old Intel 8080 SBC monitor.
When she's all done then I'll wire-wrap it onto a single board and put it in a
nice display box. I like these things to work, as opposed to collecting chips
to sit and gather dust.
This brings me to a question. Does anyone know any chip brokers that sell
a small number of chips to hobbyists? I've tried a few but they seem uninterested
in selling small numbers and to private buyers. I don't understand this 'cos I
doubt
there will be orders for thousands of old chips like the SC/MP from businesses -
and rather then sit and collect dust at least the brokers could sell some of their stock
to private buyers.
river