The
Interface
Boards
Handshaking timing
Print buffer area
Printer status
Printer output
Vacant area = 256 bytes
Cannot receive input data
S e n d s X - O F F c o d e o r
sets DTR flag to "1"
Vacant area = 528 bytes
Can receive input data
Sends X-ON code or
resets DTR flag to "0"
Error handling
When
a parity error is detected, your printer prints an asterisk (*).
All other errors are ignored.
A-10
Appendix