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Interrupt Type Codes
4-11
Interrupt Handling
Figure 4–1. Adapter Check Interrupt Fields
Failure code00000000
00R/WR/TL/DChannel000
Byte 0Byte 1
Byte 2Byte 3
0123456789101112131415
16171819202122232425262728293031
Table 4–1. Adapter Check Bit Definitions
Bit Name Function
28–21 Channel This field indicates the active PCI channel at the time of the failure.
20 L/D List not data: If this bit is set to 1, a PCI list operation was in progress at the time of the
failure. If this bit is set to 0, a PCI data transfer operation was in progress at the time
of the failure.
19 R/T Receive not transmit: If this bit is set to 1, a PCI receive channel operation was in prog-
ress at the time of the failure. If this bit is set to 0, a PCI transmit channel operation was
in progress at the time of the failure.
18 R/W Read not write: If this bit is set to 1, a PCI read operation was in progress at the time
of the failure. If this bit is set to 0, a PCI write operation was in progress at the time of
the failure.
This bit can be used to differentiate between list reads and CSTAT field writes, which
are both list operations.
7–0
Failure code This field indicates the type of failure that caused the adapter check.