IBM Proprinter Emulation
Page 4-6
Double-High Mode ESC [ @ n1 n2 m1 m2 m3 m4
Selects single or double-high mode, single or double-wide mode, and single or double
line feeds.
The two bytes n1 and n2 specify how many mode bytes (m1, m2, m3, m4) follow.
Theoretically, there may be n1 + (n2 x 256) mode bytes. Actually, n2 must be 0, and
n1 may be 0 to 4, but is normally 4.
m1 and m2 must be 0 (NUL). m3 and m4 may be set to the values in the following
tables.
m3 hex character height and line spacing
0 00 no change
1 01 line feeds unchanged, single-high characters
2 02 line feeds unchanged, double-high characters
16 10 single line feeds, character height unchanged
17 11 single line feeds, single-high characters
18 12 single line feeds, double-high characters
32 20 double line feeds, character height unchanged
33 21 double line feeds, single-high characters
34 22 double line feeds, double-high characters
m4 hex character width
1 01 single-wide characters
2 02 double-wide characters
Example: The following escape sequence will select double-wide and double-high
mode, with double line feeds.
Escape Sequence: ESC [ @ 4 0 0 0 34 2
Hexadecimal: 1B 5B 40 04 00 00 00 22 02
Select Subscript or Superscript Mode ESC S n
Selects subscript mode for n=1, or superscript mode for n=0. This will print
characters about half the normal height, in the bottom or top half of the normal
character cell.
Example: The following escape sequence will select superscript mode.
Escape Sequence: ESC S 0
Hexadecimal: 1B 53 30
Cancel Subscript and Superscript Mode ESC T
Cancels subscript and superscript mode.
Escape Sequence: ESC T
Hexadecimal: 1B 54
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