DIGITAL-LOGIC AG
4.20
System I/O map
The following table shows the detailed listing of the I/O port assignments used in the MICROSPACE
MSM286 board:
I/O Address:
0000 - 001Fh
0020 - 003Fh
0040 - 004Fh
0050 - 005Fh
0060 - 007Fh
0070 - 007Fh
0080 - 009Fh
00A0 - 00BFh
00C0 - 00DFh
00F0 - 00FFh
01F0 - 01F8h
0201
0202 - 021Fh
0220 - 0227h
0228 - 022Fh
0278 - 023Fh
0278 - 027Fh
02A0 - 02A1h
02A4
02ACh
02F8 - 02FFh
0300 - 031Fh
0320 - 036Fh
0378 - 037Fh
03B0 - 03DFh
3D4
3D5
3D8
3D9
3DA
3DB/C
03C0 - 03DFh
03E8 - 03EFh
03F0 - 03F7h
03F8 - 03FFh
MSM286:
DMA controller 1
Interrupt controller 1
Timer 1
reserved
Keyboard, System port
Real Time Clock (virtually)
DMA page registers
reserved
reserved
reserved
IDE HD-Controller
EMS
EMS
reserved for COM3
reserved for COM4
reserved for COM4
reserved for LPT2
Real Time Clock (real address)
Power management Latch / LCD Contr.
Watchdog strobe
COM2
reserved for Ethernet LAN
free
LPT 1
Mono or CGA
Index register
Data register
Mode control register
Color select register
Status register
Pen strobe register
Reserved for optional VGA controller
Reserved for COM3
Floppy disk
COM 1
25
MSM286 Manual V6.4
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