Motherboard Resources; Memory Map; Dma Channels - Intel AN430TX - Motherboard - ATX Technical Product Specification

2 Motherboard Resources

NOTE
For more detailed information about the resources used for onboard audio, see the Audio
Subsystem section in Chapter 1.

2.1 Memory Map

Table 34.

Memory Map

Address Range
(decimal)
1024 K - 262144 K
960 K - 1024 K
944 K - 960 K
936 K - 944 K
932 K - 936 K
928 K - 932 K
896 K - 928 K
800 - 896 K
640 K - 800 K
639 K - 640 K
512 K - 639 K
0 K - 512 K

2.2 DMA Channels

Table 35.

DMA Channels

DMA Channel Number
0
1
2
3
4
5
6
7
Address Range
(hex) Size
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
BIOS
Boot Block (available as UMB)
ESCD (Plug and Play configuration and
DMI)
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
Resource
Audio
Audio / Parallel Port
Floppy Drive
ECP parallel port / Audio
Reserved - Cascade Channel
Open
Open
Open
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