woodelf wrote:
Chuck Guzis wrote:
On 7/23/2006 at 1:29 PM woodelf wrote:
> Bipolar, as in 82s141 type? I'd forgotten that this was a "vintage"
> list,
> sorry. I had my share of grief programming bipolars back in the
> 80's--lots
> of "oh damn, that doesn't work, toss it in the trash and try again"
> irritation.
Trick is to burn only those parts of the microstore pertinent to
the opcode you are debugging. You can then learn from those
mistakes and "do it right" for the next opcode in a virgin portion
of the PROM. Cuts down on the number of wasted parts.
I could I guess if I really need one programmed I
could find
somebody on the list. Prom burning is still needed ( not food
burning like my supper here) to repair older machines.
Still, my inclination would be to use a PeeCee if
I had to do the job.
Somehow, keying in and checking 1536 dgits (you did say "octal" didn't
you?) for every EPROM doesn't appeal to the lazy person in me.
But all the low cost EPROM programmers use a PeeCee not todays
CRAP!I was looking at the low cost one and DAMIT software
will not run under the windows I have. Stupid software protection.
Having a printer port is NOT my idea of open hardware.
Boot to DOS. Or, keep an old machine handy for just this
reason (I keep my Compaq Portable 3 for just such things)
Back to the design ... any market for a 20 bit cpu.
:)
Buy 3 or more and I'll throw in a few extra bits too.
Aim for 36 bits (?) and run MULTICS! (or have I
misremembered that...?)