IBM 4247 A00 User Manual page 236

v Set Initial Conditions
v Select Score Line (2381 and 4247 only)
v Unidirectional Printing
v Set Horizontal Margins
The following conditions also cause buffered data to be released for printing:
v Serial BREAK or parallel -INIT
v Automatic Line Wrap
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4247 Printer Model A00 User's Guide
An automatic line wrap consists of a carriage return and line feed inserted after
the maximum number of characters has been printed on a line. The next
character is then printed at the left margin on the following line. Automatic line
wrap occurs for text data but not for bit image graphics.