HP E-PC C10 Technical Reference Manual page 39

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
0000 - 000F
0010-001F, 0022 -003F, 0044-005F,
0062-0063, 0065-006F, 0072-007F, 0084-0086,
04D0-04D1, 0080, 0088, 008C-008E, 0090-009F,
00A2-00BF, 00E0-00EF, 0400-047F, 0480-04BF,
04D0-04D1, 0800-0847F
0020 - 0021, 00A0-00A1
0040 - 0043
0060, 0064
0061
0070 - 0071
0081 - 0083, 008F, 0087, 0089-008B,
00C0-00DF
00F0 - 00FF
0170 - 0177
01F0 - 01F7
0376
0378 - 037F, 0778 - 077F
03F8 - 03FF
0CF8 - 0CFF
03B0-03BB, 03C0-03DF
0540-054F
B000-BFFF
BC00-BC7F
03F6, FFA0 - FFA7, FFA0-FFAF
D400-D41F
D800-D83F, DCFF
FFA0-FFA7
FFA0-FFAF
FFA8-FFAF
Function
DMA controller
Motherboard resources
Programmable Interupt Controller
System Timer
PC/AT Enhanced Keyboard
System Speaker
RTC and CMOS data
DMA Controller
Numeric Data Processor
Ultra ATA Controller, Secondary ATA Controller
Ultra ATA Controller, Primary ATA Controller
Ultra ATA Controller, Secondary ATA Controller
LPT1 ECP
COM1
PCI bus
Chipset Graphic Drivers
SMBus controller
PCI Bridge
NIC
Ultra ATA Controller, Primary ATA Controller
USB Universal Host Controller
Audio
Primary ATA Controller
Ultra ATA Controller
Secondary ATA Controller
4 BIOS overview
BIOS addresses
35