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.
Description of the basic function
Conventional system memory
0008 0000 0009 F7FF 126 K Conventional system memory
0009 F800 0009 FFFF 2 K XBDA, extended Bios Data
000A 0000 000A FFFF 64 K VGA graphics refresh memory Shared SMM for power
000B 0000 000B 7FFF 32 K Software graphics / text refresh
Not used
000B 8000 000B FFFF 32 K VGA graphics/text refresh
000C 0000 000C FFFF 64 K VGA BIOS Always allocated or
000E 0000 000F FFFF 2 × 64K DMI data, System BIOS, Op-
0010 0000 CFFF FFFF 3.2 GB System memory 4 GB memory
Depends on memory
High Precision Event Timer
FED1 9000 FED1 9FFF 4 K Motherboard resources
FED2 0000 FED3 FFFF 128 K Motherboard resources
Trusted Platform Module 1.2
FF00 0000 FFFF FFFF 16 M Motherboard resources Intel
®
82802 firmware
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