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Digital Research Computers -- LS-100 RAM Disk
This was a very nice little RAM disk board Digital Research Computers made around 1983.

RAM Disk

DRC called this board the "Light Speed 100".   It acted as a very fast CPM disk with a capacity of 256K. It utilized the Intel 8203-1 Dynamic RAM refresh controller and so was very reliable.  It was also IEEE-696 compatible. All operations went through 4 constitutive I/O ports which was switch configurable. The board came with some basic software to get it going under CPM. Up to 8 boards could be configured in a S-100 system.

The  manual for this board can be obtained here  and a software listing here.


Digital Research Computers S-100 Boards
16K RAM     8K RAM    16K ROM    32K EPROM    Sound Effects Board    Z80 CPU Board   128K RAM/EPROM   LS-100 RAM Disk
64K Static RAM


This page was last modified on 10/25/2013