Xycom XVME-678 Manual page 130

Chapter 5 - XVME BIOS Functions
5.6.2 Set VMEbus Interrupt Group Configuration
This function can be used to enable or disable the VMEbus Interrupt Group AMIs. The previous
configuration is returned upon completion.
Int ISh
Function AFH
Call With:
Returns:
Subfunction SIB
AH
=
AFH
AL
=
SIR
BX
=
Desired VMEbus interrupt group configuration
o -
VMEbus interrupt group disabled
1 -
VMEbus interrupt group enabled
If error: Carry Flag Set
If successful:
Note:
AH
=
Error Code
DI
=
"XY"
Carry Flag Clear
AR
=
0
DI
=
"XY"
BX
=
Previous VMEbus interrupt group configuration
o -
VMEbus interrupt group disabled
1 - VMEbus interrupt group enabled
When enabled, VMEbus interrupts come in on IRQIO. It is the responsibility of the user to ensure that
IRQIO is enabled via the 8259 and that an appropriate interrupt handler is provided. MS-DOS allows the
user to directly manipulate the 8259 and the interrupt vector table. Other operating systems usually
provide a service for attaching to and enabling specific PC/AT IRQs.
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