Tall Tree Systems`JRAM-3'

From: Tothwolf <tothwolf_at_concentric.net>
Date: Sat Dec 1 23:46:34 2001

On Sat, 1 Dec 2001, Robert Schaefer wrote:

> 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?

This sounds like a memory expansion+i/o card, with functions similar to
the well known AST Six Pak Plus board. Does this card also have a 26 pin
header somewhere for the second serial port? Does it have a battery for a
real time clock? Make sure you write down the board's current dip switch
settings if you decide to try changing anything...

-Toth
Received on Sat Dec 01 2001 - 23:46:34 GMT