Compuprint 4247-Z03 Programmer Manual - Manual (Page 31)

Shift In is a buffer terminating control; if printable data at a different character-per-inch setting is buffered,
that data is printed before the setting is changed. The current print position becomes the next printable
column at the new character-per-inch setting. CPI can be changed within a print line, and this control
changes the maximum number of characters that can be printed on one line.
When Printer Compatibility 7 – Condensed Print option in the ASCII Configuration Menu is set to 15 CPI,
then 15 CPI is selected, otherwise, 16.7 CPI or 17.1 CPI is selected.
A combination of 12 CPI and Condensed Print sets the printer to 20 CPI when Printer Compatibility 9 (20
CPI) option is set to Enabled in the ASCII Configuration menu. A combination of 12 CPI and Condensed
Print sets the printer to 12 CPI when Printer Compatibility 9 (20 CPI) option is set to Disabled in the ASCII
Configuration menu.
Device Control 1 (ESC DC1 / Select)
1B 11
This control selects the printer.
Device Control 2 (ESC DC2) / Select 10 CPI
1B 12
This control sets 10 characters per inch. DC2 is a buffer terminating control; if printable data at a different
characters-per-inch setting is buffered, that data is printed before the setting is changed. The current print
position becomes the next printable column at the new character-per-inch setting. CPI can be changed
within a print line.
Device Control 3 (ESC DC3) / Deselect
1B 13
This control is treated as a NUL.
Device Control 4 (ESC DC4) / Cancel Double-Wide Print
1B 14
This control cancels double-wide printing if double wide was selected with the Shift Out control. The
characters-per-inch setting returns to the previous value.
Cancel (ESC CAN)
1B 18
This control purges all data in the preceding print buffer. Any data received after Cancel is processed
normally. Cancel does not change the current print position.
Chapter 1. Personal Printer Data Stream (PPDS) 11