HP Vectra XU 6/XXX HP Vectra XU 6/xxx, Guide to Optimizing performance - Page 73

C0000h - C7FFFh

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2 Technical Reference Technical Characteristics Address 0 - 3FFh (0 to 1KB) 400h - 4FFh (1 KB to 1 KB + 256 bytes) 500h - 9FFFFh (1 KB + 256 bytes to 640 KB) A0000h - BFFFFh (640 KB to 768 KB) C0000h - C7FFFh (768 KB to 800 KB) C8000h - DFFFFh (800 KB to 896 KB) E0000h - EFFFFh (896 KB to 960 KB) F0000h - FFFFFh (960 KB to 1024 KB) 100000h - F00000h (1024 KB to top of memory) DMA 0 DMA 1 DMA 2 DMA 3 DMA 4 DMA 5 DMA 6 DMA 7 Memory Address Map Description Interrupt Vector Table BIOS Data Area Base Memory Used by PC operating systems and software applications Video Memory Video BIOS Data Area Available for accessory board BIOS Available Used by PC operating systems for device drivers BIOS Area Extended Memory Used by software applications DMA Channels Available Available if not used by parallel port or audio subsystem Flexible disk drive controller Available if not used by audio subsystem Used to cascade DMA channels 0-3 Available if not used by audio subsystem Available Available if not used by audio subsystem English 67

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English
67
2
Technical Reference
Technical Characteristics
Memory Address Map
Address
Description
0 - 3FFh
(0 to 1KB)
Interrupt Vector Table
400h - 4FFh
(1 KB to 1 KB + 256 bytes)
BIOS Data Area
500h - 9FFFFh
(1 KB + 256 bytes to 640 KB)
Base Memory
Used by PC operating systems and software applications
A0000h - BFFFFh
(640 KB to 768 KB)
Video Memory
C0000h - C7FFFh
(768 KB to 800 KB)
Video BIOS Data Area
C8000h - DFFFFh
(800 KB to 896 KB)
Available for accessory board BIOS
E0000h - EFFFFh
(896 KB to 960 KB)
Available
Used by PC operating systems for device drivers
F0000h - FFFFFh
(960 KB to 1024 KB)
BIOS Area
100000h - F00000h
(1024 KB to top of memory)
Extended Memory
Used by software applications
DMA Channels
DMA 0
DMA 1
DMA 2
DMA 3
DMA 4
DMA 5
DMA 6
DMA 7
Available
Available if not used by parallel port or audio subsystem
Flexible disk drive controller
Available if not used by audio subsystem
Used to cascade DMA channels 0-3
Available if not used by audio subsystem
Available
Available if not used by audio subsystem