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Motherboard Resources
Memory Map
Address Range
(decimal)
1024 K - 1048576 K
1024 K - 524288 K
928 K - 1024 K
800 K - 928 K
640 K - 800 K
639 K - 640 K
512 K - 639 K
0 K - 512 K
DMA Channels
DMA Channel Number
0
1
2
3
4
5
6
7
I/O Map
Address (hex)
0000 - 000F
0020 - 0021
002E - 002F
0040 - 0043
M o t h e r b o a r d : f e a t u r e s & u p g r a d e s
Address Range
(hex)
100000 - 3FFFFFFF
100000 - 1FFFFFFF
E8000 - FFFFF
C8000 - E7FFF
A0000 - C7FFF
9FC00 - 9FFFF
80000 - 9FBFF
00000 - 7FFFF
Data Width
8 or 16 bits
8 or 16 bits
8 or 16 bits
8 or 16 bits
16 bits
16 bits
16 bits
Size
Description
16 bytes
PIIX4 - DMA 1
2 bytes
PIIX4 - interrupt controller 1
2 bytes
Super I/O controller configuration registers
4 bytes
PIIX4 - Counter/Timer 1
Size
Description
1023 MB
Extended memory (EDO
memory)
511 MB
Extended memory (SDRAM)
96 KB
System BIOS
128 KB
Available high DOS memory
(open to ISA and PCI bus)
160 KB
Video memory and BIOS
1 KB
Extended BIOS data (movable
by memory manager software)
127 KB
Extended conventional memory
512 KB
Conventional memory
System Resource
Audio
Audio/parallel port
Floppy drive
Parallel port (for ECP)/audio
Reserved - cascade channel
Open
Open
Open
FT1200 HANDBOOK
Continued
5/23
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