Star Micronics 8 Series Applications Manual page 42

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Select Simplex/duplex mode (DX type only)
You can change betweensimplexand duplexmode using softwarecom-
mandsin any emulationmode.The commandto do this is:
<ESC>[ D n
where n is an ASCIIvalueof either"1" or "2". If n is set to"1", then the
printerwillentersimplexmode,andif n is "2",theprinterwillenterduplex
mode.
Iftheprinteris in simplexmode,the"1"optionwillhavenoeffect.If the"2"
optionis chosenwhilethe printeris in duplexmode,it is only validif then
face-downoutputstack has been selected.The page containingthis com-
mand will becomethe face of the double-sidedpage.
If the printer is in duplex mode, the "l" option will force single-sided
printing,commencingwiththepagecontainingthiscommand.If theprinter
is alreadyin duplexmode,thepagecontainingthiscommandwillbc forced
to be the face of the next double-sidedpage.
The DUPLEXlight on the front panel will indicatethe current simplex/
duplexstatusof the printerfollowingreceiptof this command.
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