Rules For Attribute Combinations; Parity Errors - Honeywell PRU7070 Handbook

Rules for Attribute Combinations
Attributes can be combined according to these rules:
• Attributes are effective at the point where they appear in the data stream.
• Sequences of allowed attributes are closed by a subsequent printable
character.
• Attributes are in force until receiving a new attribute or the Restore
attribute.
• The Pitch attribute changes only by the assignment of a new pitch. Pitch
Parity Errors
When a parity error occurs and the request data block retransmission switch is not
set, escape sequences are handled as follows:
• Escape code with a parity error - a diamond is printed for the Escape
code received in error and the following codes of the sequences are printed.
• Sequences with a parity error - a diamond is printed in place of the
character received in error and the preceding part of the sequence is dis-
carded while the following sequence code is printed.
• If the request data block retransmission switch is set, no printing takes place
until the block has been correctly received.
Printer CODunands and
Programming Information 4-20 CY93-01