Model 466-1 Adapter
Adapter Functions 9
1.7 Interrupt And Error Handling
Four
cable interrupt
(
CINTx)
lines are used to pass the various types of
interrupts between cards. A cable interrupt is the latched representation of the
backplane or programmed interrupt to be passed across the cable.
There are three sources of interrupts from the adapter:
Cable interrupts from the VMEbus (backplane interrupts).
An interface error interrupt.
Programmed interrupts.
1.7.1 Backplane Interrupts
Up to four of seven VMEbus interrupts (IRQ1 - IRQ7) may be passed to the
SBus backplane. VMEbus interrupts are passed across the cable interrupt
lines to the SBus adapter card. The SBus adapter card always interrupts at
exactly one level.
1.7.2 Interface Error Interrupt
The error interrupt is active when a timeout, parity error, or remote node bus
error is detected on the adapter card. It remains active until cleared with a
reset status error
command. The interface error interrupt and status bit are
meaningful only if the adapter card initiates communication over the cable to
the other adapter card.
For the SBus adapter card, an error interrupt occurs only if both card
interrupts are enabled and error interrupts are enabled.
Содержание 466-1
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