Technical specifications
8.6 Hardware descriptions
SIMATIC IPC427D
Operating Instructions, 05/2017, A5E31347215-AB
131
8.6.3
System resources
8.6.3.1
Currently allocated system resources
All system resources (hardware addresses, memory configuration, allocation of interrupts,
DMA channels) are assigned dynamically by the Windows OS, depending on the hardware
configuration, drivers and connected external devices. You can view the current
configuration of system resources or possible conflicts with the following operating systems:
Windows Embedded Stand-
ard and
Windows 7 Ultimate
Start menu "Start": Enter "msinfo32" in the search field and press
"Return" to confirm.
8.6.3.2
Allocation of system resources
The following tables and images describe the system resources for the delivery state of the
device.
PCIe interrupt lines
The interrupts are assigned to devices by BIOS. There are exclusive non-shared interrupts
for DP12 and the first Ethernet interface.
This means that applications or realtime operating system expansions can operate these
devices exclusively and with high-performance without having to share the interrupt with
other devices.
Interrupt sharing in APIC mode:
Interrupt
Interrupt type
IRQ0
HPET (High Precision Event Timer), when HPET is
enabled in the BIOS "Advanced" menu.
System Timer, when HPET is disabled.
ISA exclusive
IRQ1
Free
IRQ2
Interrupt controller 2
ISA exclusive
IRQ3
Com Port 2 (COM2)
ISA exclusive
IRQ4
Com Port 1 (COM1)
ISA exclusive
IRQ5
CAN (optional)
ISA exclusive (CAN)
IRQ6
Free
IRQ7
Free
IRQ8
System CMOS / real-time clock
ISA exclusive
IRQ9
ACPI-SCI (system control interrupt)
IRQ10
Free
IRQ11
Free
IRQ12
Free
IRQ13
Numeric data processor
ISA exclusive
IRQ14
Free
