26 May
2000
26 May
'00
1:40 a.m.
Is anyone interested in trading a pair of what appear to be two 256K
Unibus memory boards, made by National Semiconductor Memory Systems
(these boards have four rows of thirty-two 4164-15 ICs on them), for
two of the following:
What am I missing here ?
4 rows of 32 64Kbit RAM chips is 4 rows, each of 4*64K bytes. Or a total
of 16 * 64K bytes, or 1 Mbyte.
These boards are larger than you thought, I think (!).
Are you sure they're Unibus? The reason I ask is that I've seen similar
boards (hex height, NatSemi) made for VAX11/730 (and I would guess
11/750) systems. They may look like Unibus boards, but the pinouts of the
A and B edge connectors is totally different!
-tony