13 Jul
2022
13 Jul
'22
5:07 a.m.
On 7/13/2022 3:02 AM, Paul Koning via cctalk wrote:
The standard ones, yes, but the connector and address wires supported up to a MW
per board, perhaps even 2. It's mentioned in the Pro technical manual. I thought
about building such a beast, never did.
I actually did design and build such a board, and yes, it supports up to
2 MB (on the PC380 only).
But the connector on the eBay board can't be a connector for a DEC
Professional RAM daughtercard because it's the wrong gender and has too
many positions. The DEC Pro RAM daughtercards also have header sockets,
not pins, and they either have 40 positions (PC325/PC350) or 48
positions (PC380). The eBay board seems to have a connector with 2x32 =
64 positions.
--Bjoren
Does
anyone know anything about this card? Especially curious is the daughtercard connector:
is it just for RAM expansion or is the daughtercard necessary for card operation?
Daughtercard almost looks like a Pro memory board, but those were 16 bit and only
256kw in size if I recall. That's can't be enough to do anything useful.