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CBM-910 User’s Manual
CITIZEN 27/47
6.5 Error Detection
• Communication error
Parity Error
When parity nonconformity heaving been detected out of odd-even parity checking conducted
when parity check is assigned.
Framing Error
When space state detected on detection of stop bit.
Overrun Error
When next following data having been transferred to receiving buffer register regardless of presence of data in
that receiving buffer register.
On occurrence of the above error, convert data at the time of occurrence into ‘ ‘ (7FH) to print it out.
RECEIVING CONTROL AND BUFFERING
The CBM-910 controls, on receipt of print data, receiving (DTR Control) in one-word unit.
If the host disregards DTR and carries out data transmission at this time. over-run of receiving data may be resulted.
This state should be avoided on the host’s responsibility. (The data discharging type host cannot follow this.)
This is applicable when the host adopts a double buffer type transmitter.