HP 525 5/XX Addresses Used by the System Bios version GJ.07.xx, MB plus- Extended Memory, 104

4 Summary of the HP/Phoenix BIOS

HP/Phoenix BIOS (BIOS version: GJ.07.xx)

I/O Addresses Used by the System (BIOS version: GJ.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).

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

Refer to the BIOS I/O Port Map (BIOS version: GJ.07.xx), on page 105 for more detailed information.

System Memory Map (BIOS version: GJ.07.xx)

	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
	E000h - EFFFFh	64	KB– Available
	F0000h - FFFFFh	64	KB– System BIOS
	100000h - FFFFFFFFh	1 MB plus– Extended Memory
	Reserved memory used by expansion cards must be located in the
NOTE
	area from C8000h to EFFFFh.

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