Specifications

Chapter 5
MEMORY AND I/O CAPABILITY
Contents Page
OVERVIEW ..................................................... 5-1
MEMORY ADDRESSING
........................................ 5-2
Memory Expansion (MEMEX)
................................ 5-2
On-Board Memory Capacity
................................... 5-2
Write Protection
.............................................. 5-3
MEMORY MAPS
................................................ 5-4
BATTERY BACKUP
............................................ 5-10
MEMORY DEVICE LOCATIONS
................................ 5-11
Sockets 3D1 and 5D1
........................................ 5-12
Sockets 7D1 and 9D1
........................................ 5-13
DEVICE ACCESS TIMES
....................................... 5-14
INPUT/OUTPUT ADDRESSING
................................. 5-15
OVERVIEW
This chapter describes the memory and I/O capabilities of the
ZT 8809A processor board. Both capacity and addressability are
detailed, along with representative memory and I/O system maps for
various applications such as the STD DOS and STD ROM
development systems.
5-1