INTERRUPTS
4.5.5 Interrupt Counter Read/Clear Register 19
The DTI-VME/S has a circular or standard interrupt queue that provides the ability to store
up to 255 standard interrupt packets before writing over any packets. The number of
standard interrupts in the interrupt queue at any time is recorded by Bits 0-7 of the interrupt
counter. A READ of this register returns the contents. A WRITE clears the Exceed Bit and
the Interrupt Counter Bits. See page 3-14 for a bit explanation of this register.
MSB
LSB
15
14
13 12
11 10 9 8 7 6 5 4 3 2 1 0
BUS
ERR
EXC
1 1/0 1/0 1/0 1/0 1/0 1 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0
Board Revision Level
Interrupt Counter
4.5.6 Autodecrement Interrupt Counter Register 20
Each time a queued standard interrupt is serviced, the interrupt queue counter must be
reduced, or decremented. The Autodecrement Interrupt Counter Register provides the
capability of reducing the queue counter. By issuing a command (READ or WRITE) to the
Autodecrement Interrupt Counter Register, the count of standard priority interrupts is
reduced by one. See page 3-14 for a bit explanation of this register.
MSB
LSB
15
14
12
11 10 9 8 7 6 5 4 3 2 1 0
BUS
ERR
EXC
1 1/0 1/0 1/0 1/0 1/0 1/0 1 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0
Interrupt Counter
Board Revision Level
Copyright 2004
4-6
DTI-VME/S
Summary of Contents for DTI-VME/S
Page 1: ...DTI VME S User Manual Document No T T MU DTXXVS A 0 A2 ...
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