TallyGenicom Matrix Printer Programmer's Manual page 157

To define download characters it is helpful to do this in a defined way:
Draft print quality or letter quality or letter quality proportional characters?
Superscript or subscript character, 12 cpi or 15 cpi character (DPQ + LQ)?
The desired print mode (DPQ or LQ or LQ proportional) must be selected in the printer.
Load characters from ROM to RAM using ESC : if necessary.
Define the new character in the RAM using ESC &.
Select the RAM character set using ESC %.
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Download Character Generator