Specifications

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2-3. TIMER & DMA CHANNELS MAP
Timer Channel Map:
Timer
Channel
Assignment
0 System timer interrupt
1 DRAM Refresh request
2 Speaker tone generator
DMA Channel Map:
DMA Channel Assignment
0 Available
1 IBM SDLC
2 Floppy Disk adapter
3 Channel-3 Available
4 Cascade for DMA controller 1
5 Available
6 Available
7 Available
2-4. I/O & MEMORY MAP
Memory Map:
MEMORY MAP ASSIGNMENT
0000000-
009FFFF
System memory used by DOS
and application
00A0000-
00BFFFF
Display buffer memory for VGA/
EGA / CGA / MONOCHROME
adapter
00C0000-
00DFFFF
Reserved for I/O device BIOS
ROM or RAM buffer.
00E0000-
00EFFFF
Reserved for PCI device ROM
00F0000-
00FFFFF
System BIOS ROM
0100000-
FFFFFFF
System extension memory