IBM XT 5160 User Manual

I/O Address Map
The following pages contain the planar and channel I/O Address
Maps.
Hex Range;"
000-01F
020-03F
040-05F
060-06F
080-09F
OAX;";"
Device
DMA controller, 8237A-5
Interrupt controller, 8259A
Timer, 8253-5
PPI 8255A-5
DMA page registers
NMI Mask Registers
Note: I /0 Addresses, hex 000 to OFF, are reserved for the
system board I/O. Hex 100 to 3FF are available
on the I/O channel.
~ These are the addresses decoded by the current set of
adapter cards. IBM may use any of the unlisted
addresses for future use.
~~ At power-on-time, the Non Mask Interrupt into the 8088 is
masked off. This mask bit can be set and reset through
system software as follows:
Set mask: Write hex 80 to I/O Address
hex AO(enable NMI)
Clear mask: Write hex 00 to I/O Address
hex AO(disable NMI)
Planar I/O Address Map
1-24 System Board

IBM XT 5160 Specifications

General

Brand	IBM
Model	XT 5160
Category	Desktop
Language	English