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SBC82810 Pentium
®
M All-in-One Half-Size Board User’s Manual
Hardware Description
14
3.4 I/O Port Address Map
The Intel
®
Pentium
®
M/Celeron
®
M CPU communicates via I/O
ports. It has a total of 1KB port addresses available for
assignment to other devices via I/O expansion cards.
Address Devices
000-01F
DMA controller #1
020-03F
Interrupt controller #1
040-05F
Timer
060-06F
Keyboard controller
070-07F
Real time clock, NMI
080-09F
DMA page register
0A0-0BF
Interrupt controller #2
0C0-0DF
DMA controller #2
0F0
Clear math coprocessor busy signal
0F1
Reset math coprocessor
0F8-0FF
Math processor
120/121
Enable watchdog timer operation (read)
1F0-1F8
Fixed disk controller
250-25F
Winbond I/O #2
300-31F
Prototype card
380-38F
SDLC #2
3A0-3AF
SDLC #1
3B0-3BF
MDA video card (including LPT1)
3C0-3CF
EGA card
3D0-3DF
CGA card
3F0-3F7
Floppy disk controller
3F8-3FF
Serial port #1 (COM1)
3E8-3EF
Serial port #3 (COM3)
2F8-2FF
Serial port #2 (COM2)
2E8-2EF
Serial port #4 (COM4)
3F0-3FF
Winbond I/O #1