Motherboard Resources; Memory Map; Dma Channels - Intel VS440FX Technical Specification

2 Motherboard Resources

2.1 Memory Map

Table 8.

Memory Map

Address Range (decimal) Address Range (hex) Size
1024 K - 262144 K
960 K - 1023 K
944 K - 959 K
936 K - 943 K
932 K - 935 K
928 K - 931 K
896 K - 927 K
800 - 895 K
640 K - 799 K
639 K
512 K - 639 K
0 K - 511 K

2.2 DMA Channels

Table 9.

DMA Channels

DMA Channel Number
0
1
2
3
4
5
6
7
100000 - 10000000 255 MB
F0000 - FFFFF 64 K
EC000 - EFFFF 16 K
EA000 - EBFFF 8 K
E9000 - E9FFF 4 K
E8000 - E8FFF 4 K
E0000 - E7FFF 32 K
C8000 - DFFFF 96 K
A0000 - C7FFF 160 K
9FC00 - 9FFFF 1 K
80000 - 9FBFF 127 K
00000 - 7FFFF 512 K
Data Width
8 or 16 bits
8 or 16 bits
8 or 16 bits
8 or 16 bits
16 bits
16 bits
16 bits
Description
Extended Memory
System BIOS
Boot Block (available as UMB)
ESCD (Plug and Play configuration)
Reserved for BIOS
OEM Logo or Scan User Flash
POST BIOS (available as UMB)
Available High DOS memory (open to ISA
and PCI bus)
Video memory and BIOS
Extended BIOS data (movable by memory
manager software)
Extended conventional memory
Conventional memory
System Resource
Audio if present, else open
Audio if present, else open
Floppy Drive
Audio if present, else Parallel Port (for ECP
or EPP)
Reserved - Cascade Channel
Open
Open
Open
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