System DMA specifications

Hardware DMA

System function

 

 

DMA0

Not applicable

 

 

DMA1*

Not applicable

 

 

DMA2*

Not applicable

 

 

DMA3

Not applicable

 

 

DMA4

Direct memory access controller

 

 

DMA5*

Available for PC Card

 

 

DMA6

Not assigned

 

 

DMA7

Not assigned

*PC Card controller can use DMA 1, 2, or 5.

System memory map specifications

Size

Memory address

System function

 

 

 

640 KB

00000000-0009FFFF

Base memory

 

 

 

128 KB

000A0000-000BFFFF

Video memory

 

 

 

 

48

KB

000C0000-000CBFFF

Video BIOS

 

 

 

160 KB

000C8000-000E7FFF

Unused

 

 

 

 

64

KB

000E8000-000FFFFF

System BIOS

 

 

 

 

15

MB

00100000-00FFFFFF

Extended memory

 

 

 

 

58

MB

04800000-07FFFFFF

Super extended memory

 

 

 

 

58

MB

04800000-07FFFFFF

Unused

 

 

 

2 MB

08000000-080FFFFF

Video memory (direct access)

 

 

 

4 GB

08200000-FFFEFFFF

Unused

 

 

 

 

64

KB

FFFF0000-FFFFFFFF

System BIOS

 

 

 

 

92 Chapter 6 Specifications

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HP C702LA, C721TU, C725BR, C718TU System DMA specifications, System memory map specifications, Hardware DMA System function

C758LA, C731XX, C707LA, C768LA, C730T specifications

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