Mapping Features - ZiLOG ZDS-1 Series User Manual

Mapping Features
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ZDS-1/25 MEMORY MAPPING
The Memory Mapping Feature allows various segments
of memory, called blocks, to exist in either the ZDS-1/25
or in the prototype system. This feature is particularly use-
ful when blocks of the prototype system are composed of
ROM, PROM, or EPROM memory. Using the mapper, the
blocks of ROM, PROM or EPROM may be described to ex-
ist in the ZDS-1/25 RAM memory to facilitate debugging of
user firmware, while the remainder of addressable memory
may be described to exist in the user's prototype system.
Also, the user may choose to map memory blocks into the
ZDS-1/25 which have not yet been developed in the proto-
type system.
The illustration shown portrays a typical memory map
used in prototype system development. Mapping occurs
using a futed block length of 256 bytes. The only restriction
to using the mapping feature is that the memory in the
ZDS-1/25 must exist for the associated block being mapped
in the user's prototype system.