2116 and other old memory chips

From: Louis Schulman <louiss_at_gate.net>
Date: Fri Jul 6 18:54:44 2001

I am in the process of attempting to repair, with Pete Turnbull's
invaluable guidance, an Exidy Sorcerer.

The manual recites that the memory chips, depending on configuration,
are 2104 (4k) or 2116 (16k).

A casual perusal of chip sources shows that most begin their dynamic
ram sections with 4116 chips. The only mention I have found of 2116
chips is in a reference to the original IMSAI memory board.

So, my questions are: Are 2116 chips 3-rail? Are 4116 chips
equivalent? Does anyone have a source for 2116 chips, if they are not
equivalent? What about 2114 static ram (used in the video section of
the Exidy)? Same problems? Were they all three rail?

A general lecture on the nature of old memory chips and their use and
selection would be very helpful (hint to Tony Duell).

Thanks, Louis
Received on Fri Jul 06 2001 - 18:54:44 BST