ZiLOG System 8000 Hardware Reference Manual

HRM
Zilog
HRM
The port addresses shown in Table 5-4 are used in the Moni-
tor Program.
Table 5-4 System Hardware I/O Port Addresses
PORT ADDRESS
CTC CHANNEL 0
CTC CHANNEL 1
CTC CHANNEL 2
CTC CHANNEL 3
SIO
DATA CHANNEL A
SIO
DATA CHANNEL B
SIO CONTROL CHANNEL A
SIO CONTROL CHANNEL B
RETI PORT
SYSTEM CONFIGURATION PORT
(or REGISTER)
FFA1
FFA3
FFA5
FFA7
FF81
FF83
FF85
FF87
FFE1
FFC1 - 2 bits baud rate, 2 bits
boot device, 4 bits other
configurations
5.10~ Monitor I/O Procedures
The I/O procedures most frequently used in the Monitor Pro-
gram are given in this section. These procedures are ac-
cessed by syste~ calls in user programs to perform console
I/O functions.
5.10~1. I/O PFocedures:
PROCEDURE NAME
TYIN
DESCRIPTION
Gets a character from the keyboard buffer. If the buffer is
empty, this procedure waits for a character to appear. The
character is stored in register RLO, and the contents of re-
gister RHO are lost.
EXAMPLE
CONSTANT
TYIN :=%04
5-41
Zilog
5-41

ZiLOG System 8000 Specifications

General

Brand	ZiLOG
Model	System 8000
Category	Desktop
Language	English