Zebra A300 Specifications Page 255

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Host Directory List
The ^HW (Host Directory List) is used to transmit a Directory List-
ing of objects in a specific memory area (storage device) back to the
Host computer (the device providing input to the printer). This
instruction will return a formatted ASCII string of object names to the
HOST via the primary serial port.
Each parameter on a line is of fixed length, and the total length of a
line is also fixed. Each line listing an object begins with the asterisk
(*) followed by a blank space. There are then 8 spaces for the Object-
name, a period and three spaces for the extension. The extension is
followed by 2 blank spaces, then 6 spaces for the object size, 2 blank
spaces and 3 spaces for option flags (reserved for future use). The for-
mat looks like this.
<STX><CR><LF>
- DIR R: xx<CR><LF>
* Objectname.ext(2sp.)(6 obj. sz. )(2sp.)(3 option flags)<CR><LF>
* Objectname.ext(2sp.)(6 obj. sz. )(2sp.)(3 option flags)<CR><LF>
<CR><LF>
- xxxxxxx bytes free <CR><LF>
<ETX>
NOTE: <STX> = Start of Text, <CR><LF> = Carriage Return/Line
Feed, <ETX> = End of Text
The instruction may be used in a stand-alone type file to be issued to
the printer at any time. The printer will return the directory listing as
soon as possible based on other tasks it may be performing when the
instruction is received.
NOTE: Remember, this instruction is processed in the order it is
received by the printer, unlike the ~HS which is processed
immediately.
246 ZPL II COMMAND REFERENCE
^HW
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