Microcom 322M - Manual (Page 73)

Chapter 8 Downloadable Fonts
322M Operator’s Manual
69
Word char_offset [last_char-first_char] an array of offsets, one for each character in
font. Each offset is the distance, in bytes,
from the start to the beginning of the
corresponding character’s data structure.
The first word in this array is the offset to the
first character’s data; the last word is the
offset to the last character’s data.
Label first_char_data
the beginning of the graphic image data
Word char_height
height of this character’s bitmap in dots
Word char_width
width of the graphic image in dots
Byte bitmap_data[char_height][byte_width]
bitmap of character, 2d array. The most
significant bit of the first byte in each row,
prints as the right most dot of the character,
and the first row is the bottom row when
printed.
8.4 Downloadable Font Command Summary
The following commands refer to the use of downloadable fonts and graphics:
^A
^D COMMAND
100 Clear User RAM: This command clears all downloadable fonts, graphics, and
stored label formats.
101 List Memory Bytes Available: The printer
will send the “>” character followed
by the amount of available bytes and then finally a “<” character. (i.e.
>192690<)
XX
104 Load Graphic Images or Fonts into User Memory without Compression:
The ^Axx specifies which memory slot to place the image/font (1-255). This
command should be used with an ASCII-HEX file that contains only printable
characters less then 80 HEX. This command supports graphics over 64KB.
XX
106 Load Graphic Images or Fonts into User Memory without Compression:
This command is intended for legacy support only and Microcom Corporation
recommends either the ^D104 or ^D107 commands. Fonts must be less than
64KB for this command to function.
XX
107 Load Graphic Images or Fonts into User Memory using Binary
Compression: The ^Axx specifies which memory slot to place the image/font
(1-255). This command will greatly reduce the image download time and
should be used whenever possible. This command may only be used with 8-
bit data connections and will not function on 7-bit data connections.