User Guide

Software Functional Overview
FIC A985 Service Manual 3-13
0C0 – 0DF 8237-2
0F0 – 0FF Math Coprocessor
170 – 177 Secondary IDE Controller
1F0 – 1F7 Primary IDE Controller
200 – 20F Game Port
220 – 22F Sound Blaster
279 PnP configuration – Address port
330 – 333 MIDI
370 – 371 Sound chip control port
378 – 37A Parallel Port
388 – 38B FM Synthesizer
398 – 399 Super I/O Chip
3B0 – 3DF Video Controller
3E0 – 3E1 PCMCIA Controller
3E8 – 3EF Fax/Modem
3F0 – 3F7 Floppy Disk Controller
3F8 – 3FF Serial Port 1
530 – 537 Microsoft Sound System
778 – 77B ECP port
A79 PnP configuration – Write data port
CF8 – CFC PCI BUS configuration register
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ISA DMA Map
DMA Channel Device
DMA 0
Unused
DMA 1
ECP
DMA 2
Floppy Disk
DMA 3
Audio
DMA 4
[Cascade]
DMA 5
Unused
DMA 6
Unused
DMA 7
Unused
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Memory Map
Address Range Length Description
00000 ~ 9FBFFh
640 KB System Memory
9FC00 ~ 9FFFFh
128 KB Video Memory
A0000 ~ BFFFFh
40 KB Video ROM
C0000 ~ CFFFFh
72 KB Unused
D0000 ~ DFFFFh
16 KB DMI information
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