Tally T5023+ Programming Manual page 152

Definition of characters Character set commands
Using the control command ESC &, the data bytes of one or more characters
defined by the user can be transferred:
ESC & (n1) (n2) (n3) (d0) (d1) (d2) (data 1) (d0) (d1) (d2) (data 2) ...
The meaning of the individual parameters is explained in the command descrip-
tion of ESC & ... (see section "Transferring the character definition" in this chap-
ter).
Meaning of the parameters d0, d1, d2:
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T5023/5023+ - Programming Guide