
Section 3: Interface Specifications
MULTIPLE JOB BUFFER
The printer is able to continuously receive print jobs while compiling and printing other jobs at the same time. It acts much like a “print buffer” to maximize the performance of the host and the printer. When using the RS232C Serial interface, the multiple job buffer uses either the Ready/ Busy with DTR (pin 20) or
With an empty receiving buffer, the status of DTR is “high” (in
The receiving buffer will not be able to receive more data again until a “Buffer Available” condition occurs. This takes place when the receiving buffer has emptied so that only 1 MB bytes of data are being held (2.0 MB bytes from being full). At this time, DTR will go “high” or an
All printer error conditions (i.e., label out, ribbon out) will cause the printer to go busy (DTR “low” or
M84Pro Service Manual | PN 9001113A | Page |