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Xerox WORKCENTRE 7120 Manual de referencia
Bit
Position
o
1,2
3
4
5,6
7
Bit
Position
0
1
2
3-7
Table 6.
Device Status Response for SIO,
no,
and HIO
Function
Interrupt Pending
Device Condition
Mode
Unusual End
Controller Condition
Reserved
State
Meaning
Interrupt is pending (that is, issued but not yet acknowledged
by an Ala instruction). A new order will not be accepted
unti I the interrupt is cleared by an Ala or HIO instruction
or by manual intervention (I/O reset from computer control
panel). Command chaining, if specified, will initiate a
new read card cycle even though an interrupt may be
pending.
A combination of these two bits indicates the current reader
condition.
o
0
Card Reader Ready.
o
1
Card Reader Not Operational - manual intervention re-
quired to clear
II
not operational" condition.
1 0
Device Unavailable - not applicable.
1 1
Card Reader Busy.
o
Card reader in "manual" mode (manual intervention
required) •
1
Card reader in "automatic" mode.
o
Execution of previous order terminated due to abnormal
condition, as listed under "Unusual End Conditions".
(Xerox 530 and Sigma 2/3 do not signal "unusual end"
when an invalid EBCDIC punch is detected.)
Same configurations as bits 1,2.
This bit is currently zero; however, it may be used in future
enhancements.
Table 7.
Device Status Response for TDV
Function
State
Meaning
Data Overrun
1
Data overrun occurred since previous order received by card
reader.
~
Validity Error
1
Validity error occurred since previous order received by
card reader.
Read Verify Error (Model 7140)
1
Read verify error occurred since last order issued by control-
ling system.
Reserved
0
These bits are currently zeros; however, they may be used in
future enhancements.
Card Reader Status Response
9