9 Mar
2025
9 Mar
'25
7:35 p.m.
ben via cctalk wrote:
On 2025-03-09 3:24 a.m., Holm Tiffe via cctalk wrote:
No. No Front Panel. I want to use IDT71502 as loadable Control store,
some small micro can load the microcode an can read back some Data.
Maybe I can use my Z280 CP/M3 Eurocard System which can run amdasm and
friends additionally, it has an SPI Interface which I put in some CPLD.
At first any Macroassembler should do the job for coding the bits in the
control store, but even AMDASM and friends are laying around somwhere on
my disks. I thin the time to talk about "real software" is when the cpu
sucessfully adds it's first bytes..
Real hardware, needs a working front panel, and memory. Real software gets toggled in.
Yes, I know, Real Programmers don't use Pascal...
(https://homepages.inf.ed.ac.uk/rni/papers/realprg.html)
Did the bootstrap loader
that way into eeprom, once. Later I found space in a CPLD that I put
the boot loader in.
You forgot to mention that the front panel must use sim TIL311's ..
The real computer is it when halts with 3 in the AC,
after adding 1 + 2.
if you get 5, you are using large values of 2.
You've got some Intel-FPU?
if you get 42, you have mice problems. :)
I have two red cats, not expecting mice problems at all.
It takes a lot of work to get here on any cpu.
Ben.
Yes I know, but technical problems arent my biggest, the biggest problem
is spare time.
Maybe I can use some other ppls. work?
https://www.tiffe.de/images/GEBS-1.jpg
https://www.tiffe.de/images/GEBS-2.jpg
https://www.tiffe.de/images/GEBS-3.jpg
That's an Bitslice CPU using an AM2910 in the CCU and four AM29203 in
the Datapath. Made from GE. That thing seems to be german made "Grundbaugruppe"
(base unit) "GE2149G206" Mnr. 10488
Haven't found any information about it, came from ebay.
There are other possibilities, two stacked boards "MP Microcontroller/B"
using 8 pcs. AM2901B that came out of an Vector Graphics Subsystem crate for
PDP11/VAX/Data General frm a Microtek Corp..
https://bitsavers.org/pdf/megatek/7000/7000_197806.jpg
https://bitsavers.org/pdf/megatek/7000/boards/CPU/
(THX Al. Kossow!)
I've got only the crate with the boards, w/o PSU, Keyboard/Display or
housing..in relativly bad shape (partially corroded).
I have to do reverse engeneering on the boards first..
Regards,
Holm
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