IBM XT 5160

The following diagram contains the System Interrupt Listing.
Number
Usage
NMI Parity
8087
a
Timer
1
Keyboard
2
EGA Display, PC Net,
3278/79
3
Asynchronous Communications
(Alternate)
PC Net(Alternate)
3278/79(Alternate)
SDLC Communications
SSC Communications
Cluster (Primary)
4 Asynchronous Communications (Primary)
SDLC Communications
SSC Communications
Voice Communications
Adapter -;"
5
Fixed Disk
6
Diskette
7
Printer
Cluster (Alternate)
-;" Jumper
selectable to 2,
3, 4, 7.
8088 Hardware Interrupt Listing
System Boards
There are two types of system boards, 64/256K and 256/640K.
RAM
64/256K System Board
The 64/256K system board has either 128K or 256K of R/W
memory. Memory greater than the system board's maximum of
256K is obtained by adding memory cards in the expansion slots.
The memory consists of dynamic 64K by 1 bit chips with an
access time of 200ns and a cycle time of 345ns. All R/W
memory is parity-checked.
1-12 System Board