IBM Series 1 User Manual page 54

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7. If during cycle steal transfers
an
error condition is
posted to the device on the status bus, the device aust
terminate further requests and cycle steal transfers,
leave the 1PL tag active, and not present an end
interrupt. If, during the cycle steal requests and
transfers, a hardware failure causes a channel
time-out, the system remains in a 'hung' condition.
The device should leave the IPL tag active. Halt or
ftCHK
will not occur. This allows diagnosis of the
problem in the state in which the failure or error
occurred.
Processor I/O Channel 2-39