ZiLOG System 8000 Hardware Reference Manual

HRM
1.1. System Description
Zi log'
SECTION 1
OVERVIEW
HRM
The System 8000 is a multiuser free-standing unit, based on
Zilog's 16-bit Z8001A microprocessor and running the ZEUS
Operating System at 5.5 megahertz. The System 8000 product
line consists of several different models. The Model 21 and
Model 31 are both similar in appearance having four or more
separate stacked modules. The Model 21 contains a 32 MB
Winchester Disk Drive within the Disk/Tape module. The
Model 31 is equipped with an 84 MB Storage Module Drive
(SMD). Both the t-I[odel 21 and Model 31 have a 17 MB Car-
tridge Tape Drive and will accomodate additional Disk or
Disk/Tape modules. Figure 1-1 shows the modules that make up
the system.
The top Processor Module controls the system and contains
the the CPU and various system controller boards within its
ten-slot card cage. The system communication is over the
32-bit Z-Bus Backplane Interconect (ZBI). Two I/O panels
located at the re?r of the processor module interconnect
with the lower modules ,I/O panels and provide disk, tape and
terminal communication.
The Disk/Tape module beneath the top module has either a
32-megabyte Winchester 9isk drive or an 84-megabyte SMD and
a 17-megabyte cartridge tape drive. Disk and Tape I/O con-
nectors are provided on the rear I/O panel.
The remaining two modules can be additional Disk/Tape or
Accessory modules that are 'interconnected to the above Disk
and/or Disk/Tape Modules. Terminal distributIon panels for
serial terminal and parallel printer connection can be added
to these modules.
Both the Model 21 and 31 system can be expanded from 8 to 24
users by installing two Secondary Serial Boards (SSB) and
terminal distribution panels.
1 -1
Zilog
1 -1

ZiLOG System 8000 Specifications

General

Brand	ZiLOG
Model	System 8000
Category	Desktop
Language	English