16 Jul
2005
16 Jul
'05
10:48 a.m.
On Jul 16 2005, 10:45, Joe R. wrote:
Jay's questions about the DEC Boot Roms
prompted me to go dig out
some
boxs of Boot ROMs that I got from Thom. I checked the
list but I
can't find
any of these listed. Does anyone know what they're
for? One box has
just
one and it's marked 23-060E4-00.
I think I've come across that but I can't remember where. Sorry!
the next box has four PROMs and they're
marked 23034E2-00, 23-033E2-00, 23032E2 and 23-061E2-00. They're
all 24 pin .6 inch wide PROMs.
Those aren't boot ROMs, they're the terminal board ROMs for a VT105 or
VT125. Replace the 061 with 031 and you'd have a VT100 set.
The next box has two 16 pin .3 inch wide PROMs
with the numbers
LM8513
990A9 and LM8514 767A9 on them. Those are DEC
numbers NOT a
commercail
number even though they sound like commercail PNs.
I don't know what 990 is but 767 is the "DU" boot for a UDA50.
The last box has some markings on it (but they may
not be
right!). The
markings are water damaged and hard to read but I can
read "M8317
bootup
module" so it appears to be for the PDP-8A. It
has two .3 inch wide
16 pin
PROMs in it. They're marked 469A2 and 465A2 and
both are also marked
8005
(date code?).
Could be. DEC were still making 8As in 1980.
Bear in mind that DEC used ROMs, EPROMS, and PROMs for lots of things
other than boot code. Smaller ones, in particular, crop up all over
some older boards as logic decoders and the like. The lists on my
website don't include those, because the lists were mostly built up as
I came across boot ROMs in systems.
--
Pete Peter Turnbull
Network Manager
University of York