Siemens SIMATIC PANEL PC 877 - Memory Address Assignments

Detailed descriptions
17.5 System resources
SIMATIC Panel PC 877
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 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