RCA Spectra 70 - Page 119

Notes
(Cont'd)
Privileged
Instructions
8. If the condition code is 1, 2 or 3 the input/output operation is not
initiated.
9. Parity errors that occur while fetching the CAW, CBA, or CCW or
that occur after the input/output operation has been initiated do not
cause a machine check
interrupt. A channel interrupt occurs and
the
program is notified of the error via the channel status byte.
10. If the first CCW is a Transfer in Channel command the Start Device
instruction terminates
and the condition code is set to o. However,
the specified device control electronics recognizes
this command as
an illegal operation and causes a channel interrupt to occur.
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