Siemens PANEL PC 877 operating instructions Memory address assignments

Detailed descriptions 17.5 System resources

17.5.2.3Memory address assignments

PCI VGA modules can be operated with an expansion ROM of a size up to 48 K.

Address			Size	Description of the basic	Possible alternative
				function	function
from		to
0000 0000		0007 FFFF	512K	Conventional system
				memory
0008 0000		0009 8FFF	123 K	Conventional system
				memory extended
0009 9C00		0009 FFFF	5K	XBDA, extended Bios Data
				Area
000A 0000		000A FFFF	64K	VGA graphics refresh
				memory
000B 0000		000B 7FFF	32K	Software graphics/text	Shared SMM for power
				refresh memory	management
000B 8000		000B FFFF	32K	VGA graphics/text refresh
				memory
000C	0000	000C BFFF	48K	VGA BIOS expansion
000C C000		000C CFFF	4K	USB
000C	D000	000C DFFF	4K	Optional PXE part,	Always occupied
000C	D000	000C FFFF	12K	unused (device driver or ISA	Can be disabled in
				hardware)	SETUP, via EMM High
					DOS Memory
000D	0000	000D 7FFF	32K	unused (device driver or ISA	via EMM High DOS
				hardware)	Memory
000D	8000	000D FFFF	32K	unused (device or ISA	via EMM High DOS
				hardware)	Memory
000D	0000	000D 97FF	38K	RAID
000D	0000	000D 93FF	37K	SATA RAID
000D	9400	000E 97FF	65K	Unused
000D	9800	000E 97FF	64K	Unused
000E 0000		000E 3FFF	16K	Legacy USB BIOS	via EMM High DOS
				extension, cannot be used	Memory
				for ISA cards!
000E 6000		000F FFFF	112K	System BIOS	via EMM High DOS
					Memory
0010 0000		00EF FFFF	14M	System memory
00F0 0000		00FF FFFF	16M-15M=1M	System memory or memory
				hole
0100 0000		7FFF FFFF	Max. 2 GB -	System memory, 512 KB of	via ISA memory setup
			16 MB	top of memory are reserved	(memory hole)
				for USB.
7000 0000		FFF7 FFFF		PCI memory address area	Depends on memory
					configuration
FFF8 0000		FFFF FFFF		Firmware HUB	For PCI expansion
					cards

SIMATIC Panel PC 877	17-35
Operating instructions, Release 07/2006, A5E00877780-01