Interface Submodules
13-7
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
13.3.2
Addressing, Interrupts, and Submodule ID
Addressing
Addressing corresponds to the AT standard.
The following addresses are occupied by the IF 962-VGA interface submodule:
Memory addresses:
A0000
H
to C7FFF
H
I/O addresses:
060
H
to 06F
H
, 3B0
H
to 3BB
H
, 3BF
H
to 3DF
H
Interrupt Request
The interface submodule supplies the following interrupts:
•
IRQ a:
Keyboard interrupt
•
IRQ b:
Mouse interrupt (trackball)
•
IRQ c:
VGA interrupt
The BIOS routes these interrupts to ISA interrupts in accordance with Table 13-6.
Table 13-6
Interrupt Assignments of the IF 962-VGA Interface Submodule
Interrupt Source of the Interface Submodule
ISA Interrupt
Keyboard
IRQ a
IRQ 1
Mouse (track ball)
IRQ b
IRQ 12
VGA
IRQ c
Can be set in the BIOS setup
Submodule ID
The IF 962-VGA interface submodule has the submodule ID 81
H
.