Technical specifications
8.5 Hardware description
SIMATIC IPC277E
120
Operating Instructions, 11/2019, A5E35783335-AE
8.5.3
System resources
8.5.3.1
Currently allocated system resources
All system resources (hardware addresses, memory utilization, interrupt assignment, DMA
channels) are assigned dynamically by the Windows operating system, depending on the
hardware equipment, drivers and connected external devices. You can view the current
allocation of system resources or possible conflicts in the Control Panel.
Procedure
To view the system resources, proceed as follows:
1.
In the Windows Start menu, select "Start -> Run".
2.
Enter "msinfo32" in the command prompt and confirm your entry with "OK".
8.5.3.2
System resources used by the BIOS/DOS
The following tables and pictures describe the system resources for the factory state of the
device.
Interrupt channels
The interrupts are assigned to devices by BIOS. An exclusive non-shared interrupt for
Windows Embedded Standard 7 and Windows 7 is available for the primary 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.
The following table shows the interrupt sharing in APIC mode:
Interrupt
Interrupt type
IRQ0
System Timer / HPET
ISA exclusive
IRQ1
PS/2 keyboard controller emulation
ISA exclusive
IRQ2
Interrupt controller 2
ISA exclusive
IRQ3
COM2
IRQ4
COM1
IRQ5
Free
IRQ6
Reserved
IRQ7
Free
IRQ8
Realtime clock
ISA exclusive
IRQ9
ACPI-SCI (system control interrupt)
IRQ10
ISA exclusive
IRQ11
Free
IRQ12
PS/2 mouse controller emulation
ISA exclusive
