Introduction
PRODUCT DESCRIPTION
The ZT 8825, a member of Ziatech’s growing STD-80 Series product
line, is a state-of-the-art memory board that accommodates 28- and
32-pin byte-wide memory chips. The board is divided into two rows
of four memory chip sockets. Device type can be configured for each
row of four sockets individually. Address decoding can be configured
separately for each 16 Kbytes of memory. This provides an extremely
flexible board that can accommodate the memory requirements of
nearly any system.
The ZT 8825 can be used with several different processors in many
modes of operation:
1.
Normal Memory: The ZT 8825 memory can be mapped in
16 Kbyte blocks to anywhere in the 1 Mbyte address space of
the STD-80 Series Bus Specification.
2.
Extended Memory:
For processors like the Intel 80286
(protected mode) and 80386 or the Motorola 680XX family, the
ZT 8825 provides memory that can be mapped in 16 Kbyte
blocks at any address, including those above the 1 Mbyte limit.
The board supports 24-bit addressing if the CPU meets the
STD-80 Series Bus Specification.
3.
Expanded Memory:
The ZT 8825 hardware supports the
Lotus-Intel-Microsoft Expanded Memory Specification (EMS),
Versions 3.2 & 4.0 and the AST Enhanced Expanded Memory
Specification (EEMS), Version 3.2. These specifications allow
access to additional memory outside of the normal 1 Mbyte
address space of the processor or DOS. The Ziatech ZT 8825
Software Support Package provides many of the DOS
subroutines required for the above specifications.
See the
ZT 8825
Software
Support
Package
manual
for
more
information.
4.
RAM or PROM disk: The ZT 8825 can be organized as a disk
using the software provided with the product. DOS can work
with these pseudo-disks in the same manner as with regular
disks.
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