43-06937 INSERT-EPIC 430 OEM INTEGRATION MANUAL - TransAct

File System
Function Read File command. All
ASCII [ESC] [RS] R
Hexadecimal 1BH 1EH 52H
Decimal
Description The [ESC] [RS]R command requests that data be read from the
file and returned to the host.
The parameters specify the length of data that should be returned
where LH * 256 + LL specifies the number of returned bytes. The data is
treated as binary data with no translations. If there is not enough data in the
file to make up the requested length, only the available data is returned.
Function Generate and return a file directory report. All
ASCII
[ESC] [RS] I
Hexadecimal 1BH 1EH 49H
Decimal
Description The [ESC] [RS]I command requests that a formatted text directory
be returned from the printer. Each line is null terminated.
Function Erase all files in a partition All
ASCII
[ESC] [RS] X
Hexadecimal 1BH 1EH 58H
Decimal
selects the partition. 0 = System, 1 = User.
Description The [ESC] [RS]X command requests that the selected partition be
reformatted. Reformatting the system partition is not recommended, as it
will erase all fonts and render the printer unusable.
Function De-fragment the file system. All
ASCII
[ESC] [RS] F
Hexadecimal 1BH 1EH 46H
Decimal
Description The [ESC] [RS]F command forces the file system to go through
the file system and clean up deleted file sectors. All sectors flagged for
deletion are actually erased and consolidated when this command is issued.
Note: File space is not necessarily freed up by a file delete. Sectors may be
marked for deletion but still be present but inactive in the file system. These
sectors take up flash space. Each cluster has a fixed number of sectors, and
if the number of deleted sectors in a cluster exceed a predefined threshold,
the cluster is de-fragmented automatically. This command forces all clusters
to be de-fragmented.
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