ZiLOG Z80 Handbook page 258

Courtesy Cromemco, Inc.
Fig. 18 - 5. Cromemco Z-2 computer system ( cover removed).
m.atically executed to that address when the system reset switch is
activated. The jump address would probably be the start of the sys-
tem monitor to enable the user to load programs for execution on
start-up, or to regain control during program execution failures.
CROMEMCO MEMORY
Cromemco memory boards include 4K byte and 16K byte RAM
boards. The 4K RAM is a static RAM while the 16K RAM is dynamic
with a "transparent" (to the user's program) refresh. Both the 4K
and 16K RAM boards have a bank-select feature which permits
memory expansion to eight banks of 64K bytes. In addition to the
RAM memory, Cromemco offers two types of PROM boards. A 16K
PROM board holds sixteen 1K byte 2708 EPROMs when fully popu-
lated. The 2708 is an erasable PROM. Exposure to ultra-violet light
erases the contents of the PROM and allows reprogramming. PROM
programming is possible by use of another Cromemco board, the
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