Mystery 2K EPROM in a Cambridge Microelectronics ROM-81 unit.
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Store useful routines and commonly used information in EPROM. Accepts either 2716 or 2732 EPROMs to allow up to 8K of memory in 2K byte increments. Separate 2K and 4K decoding is link selectable. Mapped to the 8-16K area in the TS 1000 memory map.