Lexmark FORMS 249X Technical Reference page 167

Since the b0 bit of the c parameter has a value of 01 (check digit by printer), there
must be 11 data characters (x0B) specified in the Data Transfer Command.
Invalid UPC-A command:
<x
1B5B66
0600
B7
00
00
4003
00
1B5B70
0B00
>05852549545 ...
Since b0 bit of the c parameter has a value of 0 (check digit by host/software),
there must be 12 data characters (x0C), not 11 (x0B), specified in the Data
Transfer Command.
- barcode setup command prefix
- setup data length (low byte first) -
x0006, x
- barcode type = UPC-A
- module width = default
- space width adjustment = default
- height (low byte first) - x0340 = 832
= 0.385 inches
- control byte: check digit from host,
print human readable character, center
flag character
- barcode data transfer command prefix
- data transfer length (low byte first)
- x000B, 11
Section 8: Barcodes
167