Filter
Top Products
90
4 Summary of the HP/Phoenix BIOS
HP/Phoenix BIOS (BIOS version: GX.07.xx)
I/O Addresses Used by the System (BIOS version: GX.07.xx)
Peripheral devices, accessory devices and system controllers are accessed
via the system I/O space. The 64 KB of addressable I/O space comprises 8-bit
and 16-bit I/O ports (these are registers that are located in the various
system components). When installing an expansion card, ensure that the
I/O address space selected is in the free area of the space reserved for
expansion cards (100h to 3FFh).
Refer to the BIOS I/O Port Map (BIOS version: GX.07.xx), on page 91 for
more detailed information.
System Memory Map (BIOS version: GX.07.xx)
Reserved memory used by expansion cards must be located in the area from
C8000h to EFFFFh.
100h-109h HP reserved
15Ch-15Dh I/O controller
170h-177h, 376h IDE controller secondary channel
1F0h-1F7h, 3F6h IDE controller primary channel
278h-27Fh, 378h-37Fh Parallel port
2E8h-2EFh, 2F8h-2FFh, 3E8h-3EFh, 3F8h-3FFh Serial port
370h-371h Integrated I/O Controller
3B0h-3DFh Integrated video graphics controller
3F0h-3F5h, 3F7h Integrated floppy disk drive controller
496h-497h HP reserved
678h-67Bh Parallel port if ECP mode is selected
778h-77Bh Parallel port if ECP mode is selected
00000h - 9FFFFh 640 KB–Base Memory Area
A0000h - BFFFFh 128 KB–Video Memory
C0000h - C7FFFh 32 KB–Video BIOS
C8000h - DFFFFh 96 KB–Expansion Cards Memory
E0000h - EFFFFh 64 KB–Available
F0000h - FFFFFh 64 KB–System BIOS
100000h - FFFFFFFFh 1 MB plus–Extended Memory