15 Nov
2011
15 Nov
'11
1:27 p.m.
I know the M8417 AA is 16k, and the BB is 32k, but I
have a BE and a BF.
Anyone have a list with these numbers on it?
With very few exceptions on DEC solid state memory boards over a long era, first letter is
the size, second letter is the chip manufacturer.
Often for the first letter, each letter up means a doubling in capacity but not always
true (because there were 3/4 populated boards for example.)
The mapping of last letter to manufacturer depends on rest of part number.
M8417-BB is 32Kx12 Mostek 4027 chips
M8417-BE is 32Kx12 Fujitsu 8227 chips
M8417-BF is 32Kx12 Intel 2104A chips
The "Edited Option Module List" is your friend. Hardly pocket sized though :-)