Apple 310 manual Setting Engine Device Parameters, Setsccbatch, Darkness

Page 47

C H A P T E R 2

LaserWriter Select 310 Software

setsccbatch

Syntax

channel baud options setsccbatch –

Deﬁnition This operator sets the communication parameters as speciﬁed by three integers:

■channel, which designates the serial channel. Channel 9 only is available

■baud rate, which determines the rate of data transfer

■options, which encodes parity, ﬂow control, the number of data bits, and the number of stop bits to be used in serial communication mode

The new baud rate and options do not take effect until the end of the current job. You may not set the serial channel’s baud rate to 0. A 0 setting will cause a rangecheck error to occur.

Example: 9 19200 2 setsccbatch sets the 8-pin serial channel to 19200 baud with even parity.

Refer to the section “SCC Operator Encoding,” in Chapter 3, for detailed information on this subject.

Errors invalidaccess, rangecheck, stackunderflow, typecheck

Setting Engine Device Parameters

This section describes the compatibility operators that set Level 1 engine device parameters.

darkness

Syntax

– darkness real

Deﬁnition This operator returns the darkness value set by setdarkness.

Standard value: .75

Error stackoverflow

Setting Compatibility Operators

35

Image 47

Contents Apple LaserWriter Select 310 Printer Limited Warranty on Media and Replacement Contents Page Communication Channels Page Figures and Tables Page What This Note Contains About This NoteOther Reference Material Conventions Used in This NoteApda For More InformationPage LaserWriter Select Hardware1 LaserWriter Select 310 Hardware ROM Serial Port for RS-232C Devices Communication Ports2An 8-pin serial port connector Centronics Parallel ConnectorPstrobe Signal Status Lights ROM Capability Memory CapabilitiesDram Expansion Batch ModeBasic Operation Types Interactive ModePaper Handling 7Paper handling options Page LaserWriter Select 310 Software PostScript Interpreter Software OverviewAdobe PostScript Programming Language Types LaserWriter Select 310 DriverSelects the paper tray containing A4-size paper and sets Compatibility Operators Software ParametersProduct Strings Communication Device ParametersStatusdict Setting Compatibility Operators Device Idlefonts Setting System ParametersCheckpassword DefaulttimeoutsRamsize PrinternameProduct ProductASetidlefonts SetdefaulttimeoutsSetpassword Setprintername Setting Page Device ParametersDefaultmultipurposetraysize DefaultpapertrayPagestackorder ManualfeedtimeoutManualfeed MarginsPapertray SetdefaultmultipurposepapertraysizePapersize Setmargins SetdefaultpapertraySetdostartpage Setpapertray SetpagestackorderSetpagetype Jobname Setting User ParametersJobtimeout SetjobtimeoutSetsoftwareiomode Setting Device ParametersWaittimeout Packetbackchannel Setting Communication ParametersSoftwareiomode Setpacketbackchannel SccbatchDarkness Setting Engine Device ParametersSetsccbatch Currentpacking Setting Extensions to PostScript LevelSetdarkness CurrentcacheparamsSetcacheparams PackedarraySetpacking Printer Error ParameterPostScript Language Changes PrintererrorCreating Packed Arrays Packed ArraysPacked Arrays Versus Ordinary Arrays Immediately Evaluated Names Changes in Font Cache Operation Device Resolution ImagesEnd-of-Line Recognition New Operators TrueType FontsCommunication Channels Baud Rates Serial CommunicationDTR Flow Control Parity SettingsFlow Control XON/XOFF Flow Control SCC Operator EncodingSimple Communication Protocol Communication ProtocolsBinary Communication Protocol SOH CTL-A Parallel Interface Communicating with an IBM PCDTR Flow Control for PC Communication Serial InterfaceXON/XOFF Flow Control for PC Communication Communication DynamicsStatus Queries and Spontaneous Messages Errorerror OffendingCommand operator %%