18 Jun
1997
18 Jun
'97
4:03 p.m.
I was picking up a load of Sun VME-bus equipment today
and ran across
some memory boards. These are definitely not for the suns, neither
multi-bus nor vmebus. The boards are perhaps 12"x16" and are populated
with what I presume to be memory chips (AMD 21-17559-01 / 8333EMM)
in 16 banks of 9 chips each. The connector along the back has 6
distinct edge-card pieces, with 18 contacts per connector per side.
one is manufactured by Motorola, and 4 have digital
markings. Along
the back of three of the digital boards, there are two metal
protrusions. One says AM, the other M8210. The other digital board
is AZ M8210, and it has a lot of Mostek chips that I would guess
are 16kbit 300ns chips . .
That sounds like a standard DEC hex-height board (apart from the size -
DEC boards were more like 10" long). I would suspect the memory was
probably 8 banks of 18 bits (16 bits + parity on each byte)
Does anyone know what machine used these boards?
PDP11? They might conceivably be VAX-11 boards, but I can't find the M8210
in any of my lists, so without seeing them I can't be sure.
drives to become operational. Do SMD drives
frequently show up at
swap meets, etc?
I've managed to find them. Note that there are small (8") winchesters,
larger winchesters (10.5" and 14") and downright massive demountables all
with the SMD interface.
matt
--
-tony
ard12(a)eng.cam.ac.uk
The gates in my computer are AND,OR and NOT, not Bill