Bios I/O Port Map - HP Vectra VL5 4 Technical Reference Manual

System Memory Map
00000h - 9FFFFh
A0000h - BFFFFh
C0000h - C7FFFh
C8000h - DFFFFh
E0000h - E7FFFh
E8000h - EFFFFh
F0000h - FFFFFh
100000h - FFFFFFFFh
NOTE

BIOS I/O PORT MAP

This section describes the HP BIOS port map. The next section provides more details about
how the BIOS uses the system board components mentioned in the I/O port list.
I/O Address Ports
0000-000F
0020-0021
0040-0043
0060, 0064
0061
0070
0071
0081-0083, 008F
0092
0096-009F
00A0-00A1
00C0-00DF
00F0-00FF
0170-0177
01F0-01F7
0278-027F
02E8-02EF
02F8-02FF
0370-0377
0378-037F
03B0-03DF
03BC-03BF
03E8-03EF
03F0-03F7
03F8-03FF
0CF8-0CFF
*These addresses are dedicated to configuration registers for PCI devices.
640 KB–Base Memory Area
128 KB–Video Memory
32 KB–Video BIOS
96 KB–Accessory Boards Memory
32 KB–Available
Reserved
64 KB–System BIOS
1 MB plus–Extended Memory
Reserved memory used by accessory boards must
be located in the area from C8000h to EFFFFh.
Function
DMA Controller 1
Interrupt Controller 1
Interval Timer 1
Keyboard Controller
NMI Status and Control
NMI Mask register, RTC address
RTC data
DMA Low Page register
Alternate reset and A20 Function
Internal Ports
Interrupt Controller 2
DMA Controller 2
Co-processor error
Secondary IDE Controller
IDE Controller
Parallel Port 3
Serial Port 4
Serial Port 2
Secondary Flexible Disk Controller
Parallel Port 2
Video
Parallel Port 1
Serial Port 3
Flexible Disk Controller
Serial Port 1
Used for PCI Configuration**
Bits
8
8
8
8
8
8
8
8
8
8
8
8