I / O Port Addresses - Zenith Z-100 Reference Manual

Page 2.18
System Operating Features
Table 2.7 indicates the I/O port addresses and the respective device assignments.
For further breakdowns of the individual device I/O ports, refer to the chapter
that covers the specific device.
Table 2.7. I/O Port Addresses
DEVICE
DMA Processor
Interrupt Generator
System Timer
PPI Status Port
DMA Page Registers
nterrupt
Non-Maskable I
(NMI) Enable Register
Diagnostic LEDs
Reserved
Reserved
Game I/O
Reserved
Serial Device
Parallel Printer 41
Monochrome Monitor/
Parallel Printer 42
Color Graphics Control
Floppy Disk Controller
RS-232C Serial Interface k I
HEXADECIMAL ADDRESS RANGE
000-OOF
020-021
040-043
060-063
080-083
OAO
OCO
OCI-OCF
OEO-OEF
200-20F
278-27F
2F8-2FF
378-37A
3BC-3BE
3DO-3DF
3F2-3F5
3F8-3FE