Detailed descriptions
16.3 System resources
SIMATIC HMI IPC677C
220
Operating Instructions, 04/2013, A5E02722710-04
Exclusive interrupt in PIC mode
The interrupts are automatically assigned to the slots at system startup due to the default
settings in system BIOS.
Several slots may share the same interrupt, depending on the system configuration. This
functionality is known as interrupt sharing. Exclusive interrupts are not available in PIC
mode. Disable specific system resources in order to obtain exclusive interrupts. BIOS
assigns the PIC interrupts at random during restart of the system.
16.3.2.4
Memory address assignments
PCI VGA modules can be operated with expansion ROM up to 48K.
Address
from
to
Size
Description of the basic
function
Possible alternative
function
0000 0000
0007 FFFF
512K
Conventional system
memory
0008 0000
0009 F7FF
127K
Conventional system
memory extended
0009 F800
0009 FFFF
2K
XBDA, extended Bios Data
Area
000A 0000
000A FFFF
64K
VGA graphics refresh
memory
Shared SMM for
power management
000B 0000
000B 7FFF
32K
Software graphics / text
refresh memory
Not used
000B 8000
000B FFFF
32K
VGA graphics/text refresh
memory
000C 0000
000C BFFF
48K
VGA BIOS expansion
000C 0000
000C FFFF
64K
VGA BIOS
Always occupied or
reserved
000E 0000
000FFFF
2 x 64K
DMI data, System BIOS,
Options ROMs: PXE, RAID
0010 0000
CFFF FFFF
3.2GB
System memory 4 GB
memory configuration
Depends on memory
configuration
D460 0000
D460 0FFF
4K
Motherboard resources
F000 0000
F3FF FFFF
64M
Motherboard resources
FED0 0000
FED0 03FF
1K
High Precision Event Timer
FED1 0000
FED1 3FFF
16K
Motherboard resources
FED1 8000
FED1 8FFF
4K
Motherboard resources
FED1 9000
FED1 9FFF
4K
Motherboard resources
FED1 C000
FED1 FFFF
16K
Motherboard resources
FED2 0000
FED3 FFFF
128K
Motherboard resources
FED9 0000
FED9 3FFF
16K
Motherboard resources
FEE0 0000
FEEF FFFF
1M
Motherboard resources
FF00 0000
FFFF FFFF
16M
Motherboard resources