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C.7
Bit Image Graphics
The printer supports the IBM Proprinter Single, Double,
and Quadruple Density Graphics. It does not emulate the
Proprinter consecutive-dot or slower speed with increased
density limitations. A unique <ESC> command is used
to enter each graphics density. In each density, two addi-
tional parameters in the command specify the number of
horizontal dot columns to reserve for graphics data.
Dot positions 1-8 correspond to the 8 bits in a binary
number. The ASCII equivalent of a binary bit pattern
is sent to the system to tell which dots to print. A "I"
means "ON" or "print" and "0" means "OFF" or "don't
print." Since ASCII values are used, there is a single,
unique decimal number (0-255) assigned for each possible
combination of the "ON" and "OFF' bits. This means
there is a unique number for each possible combination of
dot patterns.
NOTE: 480 Bit-Image Graphics produces graphics im-
ages up to 8" x 10". 960 Bit-Image Graphics and 1920
Bit-Image Graphics produce graphics images up to 8" x
5.5",
• 480 BIT-IMAGE GRAPHICS places the printer in
Graphics Mode and specifies up to 480 columns to
be reserved for graphics data.
• 960 BIT-IMAGE GRAPHICS (FULL SPEED) places
the printer in Graphics Mode and specifies up to 960
columns to be reserved for graphics data.
• 960 BIT-IMAGE GRAPHICS (HALF SPEED) places
the printer in Graphics Mode and specifies up to 960
columns to be reserved for graphics data. There is
no restriction on speed with the QMS printer.
• 1920 BIT-IMAGE GRAPHICS places the printer in
Graphics Mode and specifies up to 1920 columns to
be reserved for graphics data.
Proprinter Emulation Mode
F-21
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