Pci Interrupt Acknowledge Register - Motorola MVME5100 Programmer's Reference Manual

PCI Interrupt Acknowledge Register

The PCI Interrupt Acknowledge Register (PIACK) is a read only register
that is used to initiate a single PCI Interrupt Acknowledge cycle. Any
single byte or combination of bytes may be read from, and the actual byte
enable pattern used during the read will be passed on to the PCI bus. Upon
completion of the PCI interrupt acknowledge cycle, the PHB will present
the resulting vector information obtained from the PCI bus as read data.
Address
Bit
0 1 2 3 4 5 6 7 8 9
Name
Operation
Reset
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$FEFF0030
1 1 1 1 1 1 1 1 1
0 1 2 3 4 5 6 7 8
PIACK
R
$00000000
1 2 2 2 2 2 2 2 2
9 0 1 2 3 4 5 6 7
Registers
2
2 2 3 3
8 9 0 1
2-87