Siemens PANEL PC 877 User Manual
Detailed descriptions
17.5 System resources
SIMATIC Panel PC 877
Operating instructions, Release 07/2006, A5E00877780-01
Operating instructions, Release 07/2006, A5E00877780-01
17-35
17.5.2.3 Memory address assignments
PCI VGA modules can be operated with an expansion ROM of a size up to 48 K.
Address
from
from
to
Size
Description of the basic
function
Possible alternative
function
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
refresh memory
Shared SMM for power
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
hardware)
Can be disabled in
SETUP, via EMM High
DOS Memory
000D 0000
000D 7FFF
32K
unused (device driver or ISA
hardware)
via EMM High DOS
Memory
000D 8000
000D FFFF
32K
unused (device or ISA
hardware)
via EMM High DOS
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
extension, cannot be used
for ISA cards!
via EMM High DOS
Memory
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 -
16 MB
System memory, 512 KB of
top of memory are reserved
for USB.
via ISA memory setup
(memory hole)
7000 0000
FFF7 FFFF
PCI memory address area
Depends on memory
configuration
FFF8 0000
FFFF FFFF
Firmware HUB
For PCI expansion
cards