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Compact Board PCM- 6892 Rev.B
Appendix A I/O Information A - 2
A.1 I/O Address Map
Address Description User Address
000-01F DMA Controller #1 000-000F
020-03F Interrupt Controller #1, Master 020-021
040-05F System Time 040-043
060-06F 8042 (Keyboard Controller) 060-064
070-07F
Real time Clock, NMI (non-
maskable
Interrupt) Mask
070-073
080-09F DMA Page Register 080-08F
0A0-0BF Interrupt Controller #2 0A0-0A1
0C0-0DF DMA Controller #2 0C0-0DF
0F0-0FF Math Coprpcessor 0F0-0FF
170-177 Secondary IDE Channel 170-177
1F0-1F7 Primary IDE Channel 1F0-1F7
278-27F Parallel Printer Port 2 (LPT3) 278-27F
2E8-2EF Serial Port 4 2E8-2EF
2F8-2FF Serial Port 2 2F8-2FF
378-37F Parallel Printer Port 1 (LPT2) 378-37F
3B0-3BF
Monochrome Display and Printer Adapter
(LPT1)
3B0-3BF
3D0-3DF EGA / VGA card 3D0-3DF
3E8-3EF Serial Port 3 3E8-3EF
3F0-3F7 Diskette Controller 3F2-3F7
3F8-3FF Serial Port 1 3F8-3FF
A.2 1
st
MB Memory Address Map
Memory Address Description
00000-9FFFF System memory
A0000-BFFFF VGA buffer
C0000-CFFFF VGA BIOS
E0000-FFFFF System BIOS