IBM Personal Computer AT Manual To Operations page 99

ESCL Escape L (960-Bit-Image Graphics Mode)
ESCN
ESC 0
Format: ESC L;n];n2;v] ....
Vk.
Changes from the text mode to
960-Bit-Image Graphics mode. The input is
similar to ESC K. The 960-Bit-Image mode
prints at half speed of the 480-Bit-Image
mode but can produce a denser graphic
image. The number of bytes of bit-image
data (k) is n] +256n2'
Escape N (Set Skip Perforation)
Format: ESC N;n.
Sets the Skip Perforation function. The
number following ESC N sets the value for
the number of lines of Skip Perforation.
The example shows a 12-line skip
perforation. This will print 54 lines and
skip 12 lines. The value of n must be reset
whenever the page length (ESC C) is
changed.
LPRINT CHR$(27);CHR$(78);CHR$(12);
Escape 0 (Cancel Skip Perforation)
Cancels the Skip Perforation function.
LPRINT CHR$(27);CHR$(79);
Graphics Printer 1-39