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