10 Apr
2015
10 Apr
'15
8:45 a.m.
2015-04-10 17:32 GMT+02:00 geneb <geneb at deltasoft.com>:
On Fri, 10 Apr 2015, Paul Koning wrote:
What about the PDP-9 micro code memory?
http://www.ricomputermuseum.org/Home/equipment/dec-pdp-9/pdp-9-restoration/…
64 words of 36 bit memory with small transformers.
Not anything that the end user work with though.
On Apr 10, 2015, at 10:38 AM, geneb <geneb at
deltasoft.com> wrote:
I don?t know any. Certainly not any PDP-11; those used solid state ROMs,
Did the PDP14 (or any machine of that era) ever use hand-threaded (by
the end user) core boards as ROM?
Do you mean DEC machine?
Yes. or in the early boot ROM cards, diode arrays.
I want to make sure it wasn't in use before
I double-down on calling
shennanigans on "Joe" in this thread:
http://hackaday.com/2015/04/08/restoring-a-vintage-pdp-
1104-computer/#comments
As far as I know, machines of that era used cores that were so small the
DEC hired master seamstresses (myth?) to make them. It's certainly not
something that would be done in the field by John Q. Programmer.
If I'm wrong, I'll happily admit it, but it just doesn't sound reasonable.
Thanks!
g.
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