ZiLOG System 8000 Hardware Reference Manual

HRM
SIGNAL NAME
DATA DEMAND/
ACKNOWLEDGE\
BUSY\
IFVALID
FAULT\
Zilog
DEFINITION
Demand
(Data Products) when high
Acknowledge (Centronics) when low
Printer Busy
Interface valid (Data Products)
Paper empty indication (Centronics)
HRM
ON-LINE/SELECT
F.P. BUSACK
INDICATOR
(Front Panel)
F.P. POWER-ON
INDICATOR (Gnd)
(Front Panel)
F.P. POWER-ON
INDICATOR V+
(Front Panel)
F.P. NORMAL
INDICATOR
(Front Panel)
SWITCH N.C. START
(Front Panel)
SWITCH N.D. START
(Front Panel)
SWITCH RESET
(Front Panel)
ON-LINE (Data Products), SELECT (Centronics)
DMAin process
Disk or tape controller in
control of bus
Ground for power-on indicator
Indicates system is on
CPU running user. process
Auto boot
Auto boot
Resets system
Hardware jumpers on the CPU board can be set for either a
Centronics or Data Products printer interface. Refer to
Table 4-5 for possible jumper configurations.
4-10
Zilog
4-10

ZiLOG System 8000 Specifications

General

Brand	ZiLOG
Model	System 8000
Category	Desktop
Language	English