Tall Tree Systems`JRAM-3'

From: Douglas Quebbeman <dhquebbeman_at_theestopinalgroup.com>
Date: Sun Dec 2 12:02:02 2001

> Anyone know what this is? It came from a 256K IBM XT, I thought at first it
> was a video card, (it was in the first slot), but it's got eight banks of
> nine 41256 ram DIPs on it. That sounds like a lot for a mono video card,
> doesn't it? Combo card? it's got a looong double-row of pin sockets along
> the bottom just above the ISA connector, and another single row up the whole
> edge between the external connectors (male 9 pin & female 25 pin) and the
> components. Maybe a daughter board? It's got one 6-position DIP switch at
> the top right (^vvvv^) and 3 three-pin jumpers along the top near the rams,
> (xx. xx. xx.) It's got a couple've big (1/8") holes on the board, lending
> credence to the daughterboard theory. All the chips are labeled in an
> intersting way-- u84 158 is --get this-- a 74LS158N. Don't ya wish
> everything was made like this?

Expanded memory (Al la AboveBoard, etc) plus serial port. Daughter
board added realtime batter-backed clock IIRC. Used one in the Zenith
Z150 I have now (but didn't get the JRAM-3 with the Zenith).

-dq
Received on Sun Dec 02 2001 - 12:02:02 GMT