70's computers

[Jon Elson]

On 10/24/2018 01:11 PM, ben via cctalk wrote:
> On 10/24/2018 10:31 AM, Marc Howard via cctalk wrote:
>> You know that since you mentioned possibly using CMOS 
>> 22V10's why not just
>> build a board around AMD 29XX bit slice parts.  They 
>> actually predate
>> 22V10's by quite a bit and you can pretty much implement 
>> what every you
>> want to without rewiring.
>>
>> Marc
>
> * LOW POWER and REPROGRAMABLE * reglar 22V10's are 100 ma 
> per chip, and I can buy them online. I have 5 2901's but I 
> can only find them on ebay now. If I design a register 
> based machine I have them, other wise
> TTL is better for odd sized word lengths.
> Ben.
>
>
>
Well, I built a 2903 + 2910 32-bit microcoded machine in 
1982 or so.  See
http://pico-systems.com/stories/1982.html
for gory details.  But, today, it would make WAY more sense 
to do it with FPGAs.  Want to try an experiment?  Don't get 
out the wire-wrap gun or soldering iron, make a copy of the 
FPGA files and edit away. If it doesn't work, you don't have 
to undo the wiring changes! Also, the FPGA version might be 
as much as 10 times faster.

Jon