Xerox 7120 - Operational Status Byte

Table 8. Device Status Response for AIO
Bit
Position Function
State
Meaning
0 Data Overrun
1
Data Overrrun occurred since previous order received by
card reoder.
1-7
Reserved
0
These bits are currently zeros; however,
they may be used
in future
enhancements.
Table 9. Operational Status Byte
t
Function
State Meaning
Incorrect Length 1
Incorrect length condition occurred since previous order was received
by card reader.
Transmission Data Error
1
Invalid EBCDIC punch encountered during automatic read operation,
data overrun occurred, and/or read verify error (Model 7140-02) occurred
si nce previ ous order recei ved by card reader. (Xerox 530 and
Sigma 2/3 indicate invalid EBCDIC punch by setting parity error
(E flag) in the odd channel register, not the transmission data error
(TE flag) in the even channel register.)
Channel End
1
Card reader terminated its operation for any reason listed under "Chan-
nel End Conditions".
Unusual End
1
Card reader terminated its operation for any abnormal condition listed
under "Unusua I End Condi ti ons".
(Xerox
530 and Si gma 2/3 do not
signal "unusual end" when an invalid EBCDIC punch is detected.)
tFor the bit positions of these functions in the Operational Status Byte,
see the applicable Xerox Computer Reference
Manual.
10 Card Reader Status Response
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