Motorola MVME5100 Programmer's Reference Manual page 185

MASK
ACT
POL
SENSE
PRIOR
VECTOR VECTOR. This vector is returned when the Interrupt
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MASK. Setting this bit disables any further interrupts
from this source. If the mask bit is cleared while the bit
associated with this interrupt is set in the IPR, the interrupt
request will be generated.
ACTIVITY. The activity bit indicates that an interrupt has
been requested or that it is in-service. The ACT bit is set
to a one when its associated bit in the Interrupt Pending
Register or In-Service Register is set.
POLARITY. This bit sets the polarity for external
interrupts. Setting this bit to zero enables active low or
negative-edge. Setting this bit to one enables active high
or positive-edge. Only External Interrupt Source 0 uses
this bit in this register. For external interrupts 1 through
15, this bit is hard-wired to 0.
SENSE. This bit sets the sense for external interrupts.
Setting this bit to zero enables edge sensitive interrupts.
Setting this bit to one enables level sensitive interrupts.
For external interrupt sources 1 through 15, setting this bit
to zero enables positive edge triggered interrupts. Setting
this bit to one enables active low level triggered interrupts.
PRIORITY. Interrupt priority 0 is the lowest and 15 is the
highest. Note that a priority level of 0 will not enable
interrupts.
Acknowledge register is examined upon acknowledgment
of the interrupt associated with this vector.
Registers
2
2-123