Intel AN430TX Product Specification - Page 47

Motherboard Resources, 2.1 Memory Map, 2.2 DMA Channels

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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 Address Range (hex) 100000 - 10000000 F0000 - FFFFF EC000 - EFFFF EA000 - EBFFF 932 K - 936 K 928 K - 932 K 896 K - 928 K 800 - 896 K E9000 - E9FFF E8000 - E8FFF E0000 - E7FFF C8000 - DFFFF 640 K - 800 K 639 K - 640 K A0000 - C7FFF 9FC00 - 9FFFF 512 K - 639 K 0 K - 512 K 80000 - 9FBFF 00000 - 7FFFF Size 255 MB 64 K 16 K 8 K 4 K 4 K 32 K 96 K 160 K 1 K 127 K 512 K 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 2.2 DMA Channels Table 35. DMA Channels DMA Channel Number 0 1 2 3 4 5 6 7 Data Width 8- or 16-bits 8- or 16-bits 8- or 16-bits 8- or 16-bits 16-bits 16-bits 16-bits Resource Audio Audio / Parallel Port Floppy Drive ECP parallel port / Audio Reserved - Cascade Channel Open Open Open 47

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47
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)
Address Range
(hex)
Size
Description
1024 K - 262144 K
100000 - 10000000
255 MB
Extended Memory
960 K - 1024 K
F0000 - FFFFF
64 K
BIOS
944 K - 960 K
EC000 - EFFFF
16 K
Boot Block (available as UMB)
936 K - 944 K
EA000 - EBFFF
8 K
ESCD (Plug and Play configuration and
DMI)
932 K - 936 K
E9000 - E9FFF
4 K
Reserved for BIOS
928 K - 932 K
E8000 - E8FFF
4 K
OEM Logo or Scan User Flash
896 K - 928 K
E0000 - E7FFF
32 K
POST BIOS (available as UMB)
800 - 896 K
C8000 - DFFFF
96 K
Available High DOS memory (open to ISA
and PCI bus)
640 K - 800 K
A0000 - C7FFF
160 K
Video memory and BIOS
639 K - 640 K
9FC00 - 9FFFF
1 K
Extended BIOS data (movable by memory
manager software)
512 K - 639 K
80000 - 9FBFF
127 K
Extended conventional memory
0 K - 512 K
00000 - 7FFFF
512 K
Conventional memory
2.2 DMA Channels
Table 35.
DMA Channels
DMA Channel Number
Data Width
Resource
0
8- or 16-bits
Audio
1
8- or 16-bits
Audio / Parallel Port
2
8- or 16-bits
Floppy Drive
3
8- or 16-bits
ECP parallel port
/ Audio
4
Reserved - Cascade Channel
5
16-bits
Open
6
16-bits
Open
7
16-bits
Open