Printronix t8000 Administrator's Manual page 146

Determines how data bit 8 is interpreted and is traditionally used for the
parallel interface. Either data bit 8 represents the data value (80-FF hex) or
is used for the PI line.
Disable
Enable
Factory Default
IMPORTANT
Chooses between low and high resolution mode for graphics.
Low Resolution
High Resolution
Factory Default
Chooses between low and high resolution mode for dot row slewing.
Low Resolution
High Resolution
Factory Default
146
Application > VGL Setup > Data Bit 8
When the host PI line is enabled, data bit 8 internally
indicates PI line status. To use the PI line, disable data
bit 8, and enable the Host PI configuration option
(under the PI Ignored option).
The PI line is not passed directly from host to printer;
all 8 bits are used for data bits, and characters in the
hex 80-FF range can be accessed.
Enable
Data bit 8 is interpreted as either data bit 8 or PI signal,
but never both. When enabled as data bit 8, data bit 8
has priority over the PI signal, and all data above hex
7F is used to access character data and not to interpret
PI line data.
Conversely, when data bit 8 is disabled and PI signal is
used, data bit 8 of the data is reserved for use as the PI
function, and you cannot access characters in the hex
80-FF range. Therefore, to access characters in the
hex 80-FF range, data bit 8 must be enabled.
Application > VGL Setup > Cmd Resolution
Sets a low command resolution mode.
Sets a high command resolution mode.
Low Resolution
Application > VGL Setup > ^Dnn Dot Slew
Sets the dot slew command dot values to be
interpreted as 60 dpi P-Series dots.
Sets the dot slew command dot values to be
interpreted as print engine dots.
Low Resolution