Msg: 175 *Conference*

07-06-91 13:44:34

From: CHARLES STEPHENS

To : BOB GASKINS

Subj: REPLY TO MSG #114 (REPLY RE: M100 EXPANSION)

Bob,
 
        I came up with a design for a TRUE RAM Expansion device.  The secret is
(as with almost any computer, there is a secret) that you can have more than
one bank of OPTION ROM.  Don't go hunting around the board for more sockets in
your 100/102/200, but it is possible.  My design allows for upto 16 banks of
RAM/ROM that can be swapped in and out of the lower 32K of the logical memory
area.  
 
PROBLEM:
 
        As Rick has mention MORE than once, the cost are too great to make this
product in small quanities.  However, I estimate my costs to be under $50.
That includes the control circuitry, a controller ROM, and a 128K SRAM that is
battery backed up...
 
 
        If someone would help with the costs of production, I think that this
poduct would be really a hot seller, and the ROI would be worth while (hint,
hint, hint...).
 
Charles Stephens