Datamax Prodigy Operator's Manual page 129

D: Identifies the Interleaved 2 of 5 bar code. I 2 of 5 is a numeric-
only code. The ASCII range for the numeric codes is 48-57.
Code I 2 of 5's normal wide to narrow bar ratio is 5:2.
(Maximum 8 bar codes per label.)
203 DPI Printer
E: Identifies the Code 128 variable length bar code with modulo 103
checksum calculation. Code 128 can encode the entire 128 ASCII
character set, including both uppercase and lowercase alpha characters.
Code 128 is an element based bar code similar to the UPC fonts.
Therefore ratios must be equal to one. The valid ratios are 1:1, 2:2, 3:3,
4:4, 6:6, and 8:8.
The Printer supports Code 128 Code Subset A, B, and C. You can
select the Printer to start on any code subset and switch to another with
the data area (default is subset B).
Code Subset A includes all of the standard upper case alphanumeric
keyboard characters plus the control and the special characters. To
select Code Subset A, precede the data to be encoded with an ASCII A
(DEC 65, HEX 41).
Appendix D
152 DPI Printer
Page D-13