Datamax-O'Neil Class Series Programmer’s Manual - Manual (Page 267)

Class Series Programmer’s Manual 253
Appendix O
Image Loading
The printer will accept four types of image files: .BMP, .IMG, .PCX and a special Datamax-O’Neil 7-bit
ASCII file (as defined in this section). Using the Datamax-O’Neil 7-bit ASCII format will require at least
twice as much data transmission time as the other formats, (see I). The Datamax-O’Neil ASCII
image file format is made up of a set of records with identical formats, each representing a dot row of the
image; a terminator follows the last of these records.
Dot-row record
•
•
•
•
Dot-row record
Terminator
Each dot-row record has the following format:
Syntax: 80nndd...d
Where: nn - Is the number of character pairs in dd...d, represented in ASCII hex.
dd…d - Is dot data, character pairs, ASCII hex, 00-FF.
Duplicate records may be encoded using a repeat data record, following the data record that needs
duplicating. The repeat data record format is:
Syntax: 0000FFnn
Where: nn - Is the number of duplicates, ASCII hex, 00-FF.
The terminator, last record, at the image download is: FFFF