HP Vectra XU 6/XXX HP Vectra XU 6/XXX - Guide to Optimization Performance - Page 45

DMA Channels, I/O Address Map, Address hexadecimal, Function, Interrupt Request Levels IRQs

Page 45 highlights

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 Address (hexadecimal) 170h - 177h 1F0h - 1F7h 220h - 22Fh 278h - 27Fh 2E8h - 2EFh 2F8h - 2FFh 300h - 301h 330h - 331h 376h 377h 378h - 37Fh 388h - 38Bh 3E8h - 3EFh 3F0h - 3F5h 3F6h 3F7h 3F8h - 3FFh IRQ 0 IRQ 1 IRQ 2 IRQ 3 IRQ 4 IRQ 5 IRQ 6 IRQ 7 IRQ 8 IRQ 9 IRQ 10 IRQ 11 BIOS Area Extended MemoryUsed 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 I/O Address Map Function Integrated IDE controller (secondary channel) Integrated IDE controller (primary channel) SoundBlaster™ 16 audio subsystem (can be relocated) Parallel port 2 Serial port 4 Serial port 2 MPU-401 MIDI interface (can be relocated) MPU-401 MIDI interface (can be relocated) Integrated IDE controller (secondary channel) Integrated flexible disk controller Parallel port 1 Music controller (can be relocated) Serial port 3 Integrated flexible disk controller Integrated IDE controller (primary channel) Integrated flexible disk controller Serial port 1 Interrupt Request Levels (IRQs) System timer Keyboard controller Used to cascade IRQs 8-15 Available if not used by serial port Available if not used by serial port Available if not used by parallel port or audio subsystem Flexible disk drive controller Available if not used by parallel port or audio subsystem Real-time clock Available for PCI if not used by an ISA accessory board Available for PCI if not used by an ISA accessory board or audio subsystem Available for PCI if not used by an ISA accessory board

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F0000h - FFFFFh
(960 KB to 1024 KB)
BIOS Area
100000h - F00000h
(1024 KB to top of memory)
Extended MemoryUsed by software applications
DMA Channels
DMA 0
Available
DMA 1
Available if not used by parallel port or audio subsystem
DMA 2
Flexible disk drive controller
DMA 3
Available if not used by audio subsystem
DMA 4
Used to cascade DMA channels 0-3
DMA 5
Available if not used by audio subsystem
DMA 6
Available
DMA 7
Available if not used by audio subsystem
I/O Address Map
Address (hexadecimal)
Function
170h - 177h
Integrated IDE controller (secondary channel)
1F0h - 1F7h
Integrated IDE controller (primary channel)
220h - 22Fh
SoundBlaster™ 16 audio subsystem (can be relocated)
278h - 27Fh
Parallel port 2
2E8h - 2EFh
Serial port 4
2F8h - 2FFh
Serial port 2
300h - 301h
MPU-401 MIDI interface (can be relocated)
330h - 331h
MPU-401 MIDI interface (can be relocated)
376h
Integrated IDE controller (secondary channel)
377h
Integrated flexible disk controller
378h - 37Fh
Parallel port 1
388h - 38Bh
Music controller (can be relocated)
3E8h - 3EFh
Serial port 3
3F0h - 3F5h
Integrated flexible disk controller
3F6h
Integrated IDE controller (primary channel)
3F7h
Integrated flexible disk controller
3F8h - 3FFh
Serial port 1
Interrupt Request Levels (IRQs)
IRQ 0
System timer
IRQ 1
Keyboard controller
IRQ 2
Used to cascade IRQs 8-15
IRQ 3
Available if not used by serial port
IRQ 4
Available if not used by serial port
IRQ 5
Available if not used by parallel port or audio subsystem
IRQ 6
Flexible disk drive controller
IRQ 7
Available if not used by parallel port or audio subsystem
IRQ 8
Real-time clock
IRQ 9
Available for PCI if not used by an ISA accessory board
IRQ 10
Available for PCI if not used by an ISA accessory board or audio
subsystem
IRQ 11
Available for PCI if not used by an ISA accessory board