Epson PR9 User Manual page 204

ESC [ @ n1 n2 m1 m2 m3 m4
Double Height/Width
Sets double height and / or double width for the characters printed, with or without
changing the line feed.
Parameters n1 and n2 indicate the number of bytes that follow and have the following
fixed values: (4)D and (0)D respectively.
These two parameters are followed by four bytes (from m1 to m4) which have the
following values:
Parameters m1 and m2 have a fixed value: (0)D.
Parameter m3 defines the height of the characters and the line feed according to the
decimal values in the table below:
Line feed and height of characters
m3
0 No change with respect to the current settings
1 Unchanged line feed, normal height
2 Unchanged line feed, double height
16 Single line feed, unchanged height
17 Single line feed, normal height
18 Single line feed, double height
32 Double line feed, unchanged height
33 Double line feed, normal height
34 Double line feed, double height
The top half of the byte indicates the line feed (unchanged, single or double); the bottom
half of the byte indicates the height of the characters.
Parameter m4 defines the width of the characters according to the decimal values in the
table below:
Width of characters
m4
0 Unchanged width
1 Normal width
2 Double width
The top half of the byte is ignored, while the values of the bottom half of the byte are
significant.
Appendix C IBM ProPrinter X24 and IBM ProPrinter II Commands
Hexadecimal code: 1B 5B 40 04 00 00 00 m3 m4
C-17