Technical information
8.5 Hardware descriptions
SIMATIC IPC677D
148
Operating Instructions, 09/2014, A5E32995420-AC
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.
Memory address assignments
PCI VGA modules can be operated with expansion ROM up to 48 K.
Address
Size
Description of the basic function Alternative function
From
To
0000 0000
0007 FFFF
512 K Conventional system memory
0008 0000
0009 F7FF
126 K Conventional system memory
extended
0009 F800
0009 FFFF
2 K
XBDA, extended Bios Data
Area
000A 0000
000A FFFF
64 K
VGA graphics refresh memory
Shared SMM for power
management
000B 0000
000B 7FFF
32 K
Software graphics / text refresh
memory
Not used
000B 8000
000B FFFF
32 K
VGA graphics/text refresh
memory
000C 0000
000C BFFF
48 K
VGA BIOS expansion
000C 0000
000C FFFF
64 K
VGA BIOS
Always allocated or
reserved
000E 0000
000F FFFF
2 × 64K DMI data, System BIOS, Op-
tions ROMs: PXE, RAID
0010 0000
CFFF FFFF
3.2 GB System memory 4 GB memory
configuration
Depends on memory
configuration
EFFF F000
EFFF FFFF
4 K
Motherboard resources
F000 0000
F3FF FFFF
64 M Motherboard resources
FED0 0000
FED0 03FF
1 K
High Precision Event Timer
FED1 0000
FED1 7FFF
32 K
Motherboard resources
FED1 8000
FED1 8FFF
4 K
Motherboard resources
FED1 9000
FED1 9FFF
4 K
Motherboard resources
FED1 C000
FED1 FFFF
16 K
Motherboard resources
FED2 0000
FED3 FFFF
128 K Motherboard resources
FED4 0000
FED4 4FFF
20 K
Trusted Platform Module 1.2
FED9 0000
FED9 3FFF
16 K
Motherboard resources
FEE0 0000
FEEF FFFF
1 M
Motherboard resources
FF00 0000
FFFF FFFF
16 M Motherboard resources
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