Memory Address Assignments - Siemens SIMATIC Rack PC 840 V2 Operating Instructions Manual

16.4.2.3

Memory address assignments

PCI VGA modules can be operated with an expansion ROM of a size up to 48 K.
Address
from
0000 0000
0008 0000
0009 F800
000A 0000
000B 0000
000B 8000
000C 0000
000C C000
000D 0000
000D 0000
000D 0000
000D 9400
000D 9800
000D 0000
000D 65FF
000E 8000
000E 9800
0010 0000
00F0 0000
0100 0000
7000 0000
FFF8 0000
SIMATIC Rack PC 840 V2
Operating Instructions, Edition 05/2006, A5E00248055-04
Size
up to
0007 FFFF 512K
0009 F7FF 127k
0009 FFFF 2K
000A FFFF 64K
000B 7FFF 32K
000B FFFF 32K
000C BFFF 48K
000C FFFF 16K
000E 7FFF 96K
1)
000D 97FF 38K
2)
000D 93FF 37K
2)
000E 97FF 65K
2)
000E 97FF 64K
2)
000D 65FF 26K
2)
000E 97FF 76K
2)
000F FFFF 96K
2)
000F FFFF 96K
2)
00EF FFFF 14M
00FF FFFF 16M-15M=1M System memory or memory
7FFF FFFF Max. 2 GB -
16 MB
FFF7 FFFF
FFFF FFFF
Description of the basic
function
Conventional system
memory
Conventional system
memory extended
XBDA, extended Bios Data
Area
VGA graphics refresh
memory
Monochrome graphics/text
refresh memory
VGA graphics/text refresh
memory
VGA-BIOS expansion
USB
unused (device driver or ISA
hardware)
RAID
SATA RAID
Unused
Unused
SCSI
Unused
System BIOS
System BIOS
System memory
hole
System memory, 512
Kbytes of top of memory are
reserved for USB.
PCI memory address space
Firmware HUB
Detailed descriptions
16.4 System resources
Possible alternative
function
Shared SMM for power
management
Unused
Always occupied
via EMM High DOS
Memory
Via ISA memory setup
(memory hole)
Depends on memory
configuration
For PCI expansion
cards
16-21