TECHNICAL INFORMATION
_________________________________________________________________________
_________________________________________________________________________
I/O ADDRESS MAP
I/O Address Map on System Board
I/O address hex 000 to 0FF are reserved for the system board
I/O.
ADDRESS
(HEX)
DEVICE
000-01F DMA Controller 1, 8237
020-03F Interrupt Controller 1, 8259, Master
040-05F Timer, 8254
060-06F Keyboard Controller
070-07F Real Time Clock, NMI
(non-maskable interrupt) mask
080-09F DMA Page Register, 74LS612
0A0-0BF Interrupt Controller 2, 8259
0C0-0DF DMA Controller 2, 8237
0F0 Clear Math Coprocessor Busy
0F1 Reset Math Coprocessor
0F8-0FF Math Coprocessor Port
To Next Page
Loading...
Need help?
General