The SD SYSTEMS PROM-100 board was a high performance circuit
capable of programming the industry standard 2708 1K X 8 EPROM,
Intel's 2758 1K X 8 EPROM, 2716 2K X 8 EPROM, 2732 4K X 8 EPROM and
Texas Instruments 2516 2K X 8 EPROM. The PROM-100 was selected for
the appropriate EPROM type through dip switches S1 and S2.
Another notable feature of the PROM-100 was the 25V programming
pulse generated on board, eliminating the need for an external 25V
supply. The board occupied I/O addresses 68H, 69H and 6AH.
The manual for this board can be obtained
here.