5525B/31/32 Line Matrix Printer LinePrinter Plus Programmer's Reference

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Chapter 4 Configuring the Epson FX-1050 Emulation with Control Codes
Reassign Graphics Mode
ASCII Code ESC ? s m
Hex Code 1B 3F s m
Dec Code 27 63 s m
Purpose Changes one graphics mode to another.
Discussion
s is character K, L, Y, or Z, which is changed to mode m (0-7)
from Table 30 (page 131). Thereafter, sending data to the bit
image command makes the data print according to the graphics
mode you select with
m.
Remove Downloaded Characters
ASCII Code ESC : NUL n NUL
Hex Code 1B 3A 00
n 00
Dec Code 27 58 0
n 0
Purpose Erases all downloaded characters.
†
Discussion The printer ignores this command but removes all data sent.