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Hawk PCI Host Bridge & Multi-Processor Interrupt Controller
2
End-of-Interrupt Registers
EOI END OF INTERRUPT. There is one EOI register per
processor. EOI Code values other than 0 are currently
undefined. Data values written to this register are ignored;
zero is assumed. Writing to this register signals the end o f
processing for the highest priority interru p t currently in
service by the associated processor. The write operation
will update the In-Service register by retiring the highest
priority interrupt. Reading this register returns zeros.
Offset Processor 0 $200B0
Processor 1 $210B0
Bit 3
13
02
92
82
72
62
52
42
32
22
12
01
91
81
71
61
51
41
31
21
11
09876543210
Name EOI
Operation RRRRW
Reset $00 $00 $00 $0 $0