Microcom 334M, Operator'S Manual

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Chapter 7 Downloadable Fonts
334M Operator’s Manual - 880060-0110 7-2
7.3.1 FONTCV16.exe Program
1. Run the FONTCV16 program from a DOS prompt.
2. Follow the on-screen instructions and note the slot number the image is saved. The
printer uses the same font structure as the Model 438 printer. Select the Model 438
printer when converting fonts for the printer.
3. Make sure the destination memory slot is clear. The ^D100 command can be used
to clear the printer’s memory.
4. Download the resulting file (filename N12 (normal rotation) or R12 (rotated)) file to
the printer.
7.4 Font Download Methods
The printer supports both compressed and uncompressed graphic and font downloads. The
compressed format shortens the download time by reducing the number of bytes sent to the
printer. Please note that the compressed format is only usable on 8-bit data connections
and will not function on 7-bit data connections. The uncompressed (^D104) is usable on
either 7 or 8-bit connections and is more flexible but encodes using ASCII-HEX. This
results in a much larger file size. Microcom Corporation recommends the use of the
compressed format when possible.
7.4.1 Compressed Binary Commands
These commands allow graphic images or fonts to be transmitted in binary, thereby
reducing the number of bytes sent to the printer. Furthermore, the commands allow for data
compression by converting strings of 0 HEX or FF HEX to shorter byte-plus-count
sequences. These sequences are then expanded to the original number of bytes inside the
printer. These commands are only usable on data connections that support 8-bit data. So
the serial port MUST be configured for 8 Data Bits and no parity. These commands will
NOT function correctly with a serial port configured to 7-bit data bits.
7.4.1.1 Save Compressed FONT to RAM (D127)
The following is the format of the ^D127 command when used to store a compressed FONT
file into RAM.
^A<
RAM Memory Slot Number >^D127<CR>
< Rotation > < Count > < Image Data >
Where:
< RAM Memory Slot Number > is the memory slot location (1-255) where the FONT will be
saved in the printer’s RAM memory. The printer uses the same TCI of “8” to select
downloadable fonts or graphics for storage into RAM. Therefore a font and a graphic
cannot have the same Slot Number or CGN number.
<
Rotation > is an 8-bit integer, 0 for an upright FONT and 1 for a FONT rotated 90-degrees
counter-clockwise.
<
Count > is a 32-bit integer, least significant byte first. This is the number of uncompressed
bytes that the FONT uses, not the number of bytes that will actually be transmitted. Due to
compression, the number of bytes transmitted will normally be less than this number.