Compuprint MDP40B Programmer Manual - Manual (Page 128)

B-21
CODABAR DC4 DC4 ESC! n 22 p EM
The Codabar bar code data fields do not have a defined format length and
contain data belonging to the character set listed hereafter:
0 1 2 3 4 5 6 7 8 9 - $: /. +
A B C D E N T * a b c d e n t (only as START/STOP characters)
The printer allows any combination of START/STOP characters. If the first
and last characters of the received string do not belong to the START/STOP
characters subset, question marks will be printed in place of HRC string, if
possible.
CODE 128 DC4 DC4 ESC ! n 23 p EM
The CODE-128 bar code data fields do not have a defined format length and
contain data belonging to the standard ASCII character set, including control
codes.
Since GS and EM control codes used within the Compuprint DC4 DC4 ESC
(...EM ”Print Bar Code” control sequence are part of the supported character
set, the host application must SET THE HIGHER-ORDER BIT of the above
control codes to allow the printer distinguish between encodable data and
string terminators.
POSTNET DC4 DC4 ESC! n 24 p EM
The POSTNET bar code data fields contain only numeric data and do not
have a defined format length. POSTNET bar codes have no HRC string
printed and the LOW/TALL bars that encode the symbol comply with the
U.S.P.S standard; whatever will be p field value.