Interrupt And Dma Assignments - Siemens SIMATIC PC RI25/45 Technical Description

Motherboard

2.10 Interrupt and DMA Assignments

Interrupt
Assignments
NMI
IRQ 0
IRQ 1
IRQ 2
IRQ 3
IRQ 4
IRQ 5
IRQ 6
IRQ 7
IRQ 8
IRQ 9
IRQ 10
IRQ 11
IRQ 12
IRQ 13
IRQ 14
IRQ 15
DMA
Assignments
0
1
2
3
4
5
6
7
2-30
Interrupt
Expansion slots signal I/O Channel Check 2
Internal Timer (System clock)
Keyboard buffer full
Cascading of interrupt controller 2
Serial port 2 (COM 2) can be enabled via Setup
Serial port 1 (COM 1/TTY) can be enabled via Setup
MPI port can be enabled via Setup
Floppy
Parallel port 1 (Printer port LPT 1/EPP/ECP) can be
enabled via Setup
Battery-backed real-time clock
VGA controller usually unassigned
unassigned
unassigned
PS/2 Mouse/ keyboard trackball can be enabled via
Setup if no need for mouse or trackball function
Arithmet. coprocessor - error
Primary IDE interface can be enabled via Setup
Secondary IDE interface (only necessary for special
configuration versions) can be enabled via Setup
DMA Channel Data transfer
8 / 16 bit
8 / 16 bit
8 / 16 bit
8 / 16 bit
16 bit
16 bit
16 bit
Description
Description
free
free
Floppy
free
Cascading of DMA controller
free
free
free
SIMATIC PC RI25/45, Technical Description
C79000-G7076-C808-01