I/O Address Map; Address Map - IBM 5150 Technical Reference

Hex Ranoa·
Usaaa
OOO-OOF
DMA Chip 8237 A-5
020-021 Interrupt 8259A
040-043
Timer 8253-5
060-063 PP18255A-5
080-083
DMA Page Registers
OAX** NMI Mask Register
200-20F Game Control
210-217 Expansion Unit
2F8-2FF Asynchronous Communications (Secondary)
300-31F
Prototype Card
320-32F Fixed Disk
378-37F Printer
380-38C*** SDLC Communications
380-389***
Binary Synchronous Communications (Secondary)
390-393 Cluster
3AO-3A9 Binary Synchronous Communications (Primary)
3BO-3BF
IBM Monochrome Display/Printer
3DO-3DF
Color / Graphics
3FO-3F7 Diskette
3F8-3FF
Asynchronous Communications (Primary)
790-793 Cluster (Adapter 1 )
B90-B93 Cluster (Adapter 2)
1390-1393 Cluster (Adapter 3)
2390-2393
Cluster (Adapter 4)
* 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)
*** SDLC Communications and Secondary Binary Synchronous Communications
cannot be used together because their hex addresses overlap.
I/O Address Map
1-24 System Board