IBM TM7 - Manual (Page 185)

Bit Description
1 Cash receipt right home position. Set to 1 when the printhead is in the
customer receipt right home position.
2 Left home position. Set to 1 when the printhead is in the left home position.
3 Document right home position. Set to 1 when the printhead is in the document
right home position.
4 Reserved. Always 0.
5 Ribbon cover open. Set to 1 when the ribbon cover is open.
6 Cash receipt print error. Paper cover is open, the customer receipt station is out
of paper, or the cutter is jammed in the closed position.
7 (MSB) Command reject.
Status Byte 2
Bit Description
0 (LSB) Document ready. Set to 0 when the document insert station is ready for
printing. This occurs when both document sensors detect the document and the
document has been fed to the first print position.
1 Document present under the front sensor. Set to 0 when a document is under
the front document sensor.
2 Document present under the top sensor. Set to 0 when a document is under
the top document sensor.
3 Reserved. Always equals 1.
4 Print buffer held. Set to 1 when the print buffer is being held. Cleared when
buffer released.
5 Open throat position. Set to 1 when the printhead is in the open throat position.
6 Buffer empty. Set to 1 when no print data and no commands are in the buffer.
7 (MSB) Buffer Full. Set when only 1K bytes are available in the buffer.
Status Byte 3
Bit Description
0 (LSB) Memory sector is full.
1 Home error.
2 Document error. The document was not inserted after the document station
was selected, and the wait subsequently timed out.
3 Flash EPROM load error or MCT load error.
4 Reserved. Always equals 0.
5 User flash storage sector is full.
6 Firmware error. CRC on the firmware failed. The printer is running out of the
boot sector. Only system commands and firmware commands are accepted.
7 (MSB) Command complete (“Erase Flash EPROM Sector” on page 121, and whenever
a physical line is printed). Set to 1 when the command is complete or a
physical line is printed.
updated March 18, 2002
Appendix C. RS-232 Programming Information 161