College engineering course, but part of the Physics dep, we had a test
to design street signal controllers. Everybody did microcontrollers
but I did it all discrete components and had a BOM 1/10th the price of
everyone else and actually simpler logic. Yeah the prof was impressed.
Ended up working with him on SCSC detectors. Too bad we didn't
finish building it...
On 07/09/2018 08:08 AM, Chuck McCown wrote:
Yeah, we had to do a CPU out of TTL as well. Huge state machine to
decode the microcode list etc. At least it demystified CPUs for me.
My mistake was using PROMs to hold the microcode decoder logic. One
time burnable. Other guys used EPROMS and some even used GALs or PALs.
We all had to pick a flavor and in my stupidity I picked PROMs...
*From:* Dave
*Sent:* Monday, July 09, 2018 8:24 AM
*To:* [email protected]
*Subject:* Re: [AFMUG] OT Sunday Reading
WOW! ,, looks fun..
My senior college year I built a z80 CPU from discrete TTL components.
Talk about a power hog :)
On 07/08/2018 10:37 AM, [email protected] wrote:
You can get totally lost at this site:
http://www.computerhistory.org/revolution/analog-computers/3
The first computer I built was analog.
I was 11 years old.
Used 3 pots, a galvanometer and a 9 volt battery.
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