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
98
Chapter 6 Specifications
Summary of Contents for Compaq Presario CQ71
Page 1: ...Compaq Presario CQ71 Notebook PC and HP G71 Notebook PC Maintenance and Service Guide ...
Page 4: ...iv Safety warning notice ...
Page 8: ...11 Recycling Battery 126 Display 126 Index 132 viii ...
Page 131: ...Universal Serial Bus Pin Signal 1 5 VDC 2 Data 3 Data 4 Ground Universal Serial Bus 123 ...
Page 144: ......