Hp I/O Port Map (I/O Addresses Used By The System); Table 4-5 - HP P Class 450/500/550/600/650/700/750 Reference Manual

HP I/O Port Map (I/O Addresses Used by the System
Peripheral devices, accessory devices and system controllers are accessed via the system
I/O space, which is not located in system memory space. The 64 KB of addressable I/O
space comprises 8-bit and 16-bit registers (called I/O ports) located in the various system
components. When installing an accessory board, ensure that the I/O address space
selected is in the free area of the space reserved for accessory boards (100h to 3FFh).
NOTE 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.
Table 4-5. HP I/O Port Map
Default Values for
I/O Address Ports
0000 - 000F
0020 - 0021
002E - 002F
0040 - 0043
0060, 0064
0061
0070
0070 - 0071
0080
0081 - 0083, 008F
0092
00A0 - 00A1
00C0 - 00DF
00E0 - 00EF
00F0 - 00FF
0130 - 013F
0170 - 0177
01F0 - 01F7
0200 - 0207
0220 - 0232
0278 - 027F
02E8 - 02EF
02F8 - 02FF
0372 - 0377
0378 - 037A
0330 - 0333
1. If configured.
Chapter 4
DMA controller 1
Master interrupt controller (8259)
NS-317 Configuration registers
Timer 1
Keyboard controller (reset, slow A20)
Port B (speaker, NMI status and control)
Bit 7: NMI mask register
RTC and CMOS data
Manufacturing port (POST card)
DMA low page register
PS/2 reset and Fast A20
Slave interrupt controller
DMA controller 2
NS 317 GPIO
Co-processor error
AD1816 sound system
IDE secondary channel
IDE primary channel
AD1816 Joystick port
AD1816 Soundblaster
LPT 2
Serial port 4 (COM4)
Serial port 2 (COM2)
IDE secondary channel, secondary flexible disk drive
LPT1
AD1816 Ad-lib (FM)
1
)
Function
HP BIOS
BIOS Addresses
89