HP Vectra Vli 8SF Spezifikationen PDF herunterladen (Seite 50)

4 BIOS Overview

BIOS Addresses

Although the Setup program can be used to change some of the settings, the

following address map is not completely BIOS dependent, but is determined

partly by the operating system. Note that some of the I/O addresses are

allocated dynamically.

I/O Address Ports Function

0000 - 000F DMA controller 1

0020 - 0021 Master interrupt controller (8259)

002E - 002F Configuration registers

0040 - 0043 Timer 1

0060, 0064 Keyboard controller (reset, slow A20)

0061 Port B (speaker, NMI status and control)

0070 Bit 7: NMI mask register

0070 - 0071 RTC and CMOS data

0080 Manufacturing port (POST card)

0081 - 0083, 008F DMA low page register

0092 PS/2 reset and Fast A20

00A0 - 00A1 Slave interrupt controller

00C0 - 00DF DMA controller 2

00F0 - 00FF Co-processor error

0170 - 0177 IDE secondary channel

01F0 - 01F7 IDE primary channel

0278 - 027F LPT 2

02E8 - 02EF Serial port 4 (COM4)

02F8 - 02FF Serial port 2 (COM2)

0372 - 0377 IDE secondary channel, secondary floppy disk drive

0378 - 037A LPT1

03B0 - 03DF VGA

03E8 - 03EF COM3

03F0h- 03F5 Floppy disk drive controller

03F6 IDE primary channel

03F7 Floppy disk drive controller

03F8 - 03FF COM1

04D0 - 04D1 Interrupt edge/level control

0678 - 067B LPT2 ECP

0778 - 077B LPT1 ECP

0CF8 - 0CFF PCI configuration space

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HP Vectra Vli 8SF Spezifikationen Seite 50