Lexmark T642 Technical Reference page 236

setdosysstart
boolean setdosysstart —
modifies the value of the StartupMode system parameter.
true
StartupMode set to 1
false
StartupMode set to 0 (default)
true
• If , the printer executes a Sys/Start file from flash or disk when the
PostScript emulation interpreter is initialized. If no flash or disk is installed,
no action occurs.
• If a Sys/Start file is on both flash and disk, the search order for the devices
determines which one is executed.
false
• If , the printer does not execute a Sys/Start file.
Errors: invalidaccess, stackunderflow, typecheck
setduplexmode
boolean setduplexmode —
sets the value of the Duplex page device parameter for the current print job.
true
sets printing mode to duplex
false
sets printing mode to simplex
At the start of the next print job, the value is reset to the user default setting.
This operator is equivalent to executing the following PostScript emulation
sequence:
<< /Duplex boolean >> setpagedevice
Errors: configurationerror, stackunderflow, typecheck
Notes:
• If simplex printing is requested between the front side and back side of a
sheet, a blank back side is printed and information for the back side is
printed on the front side of the next sheet.
• For printers that do not support duplexing, this value is always set to
4-40
PostScript
false
.