Apple 310 manual Sccbatch, Setpacketbackchannel

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C H A P T E R 2

LaserWriter Select 310 Software

sccbatch

Syntax

channel sccbatch baud options

Deﬁnition This operator returns the baud rate and options for the speciﬁed serial channel. Channel 9 only is available with this printer.

baud and options affect the following device parameters:

■Baud, StopBits, and FlowControl

■DataBits and Parity

■CheckParity

See “setsccbatch” for further information.

The values for data bits and parity are determined by the bit positions. See the section “SCC Operator Encoding” in Chapter 3.

Baud, stop bits, and ﬂow control are determined respectively by the corresponding settings for Baud, StopBits, and FlowControl device parameters.

Standard value: 57600 68

This value represents an 8-pin serial channel with a baud rate

of 57600, space parity, DTR ﬂow control, 8 data bits, and one stop bit. (See Table 3-6.)

Errors rangecheck, stackoverflow, stackunderflow, typecheck

setpacketbackchannel

Syntax

bool setpacketbackchannel –

Deﬁnition This operator sets the serial communications back channel packet DTR protocol to be on if bool is true, or off if bool is false. The packet protocol is used exclusively by the Apple LaserWriter driver and should be set by it only.

Errors invalidaccess, stackunderflow, typecheck

34	Setting Compatibility Operators

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Contents Apple LaserWriter Select 310 Printer Limited Warranty on Media and Replacement Contents Page Communication Channels Page Figures and Tables Page About This Note What This Note ContainsConventions Used in This Note Other Reference MaterialFor More Information ApdaPage LaserWriter Select Hardware1 LaserWriter Select 310 Hardware ROM Communication Ports Serial Port for RS-232C DevicesCentronics Parallel Connector 2An 8-pin serial port connectorPstrobe Signal Status Lights Memory Capabilities ROM CapabilityBasic Operation Batch ModeDram Expansion Interactive Mode TypesPaper Handling 7Paper handling options Page LaserWriter Select 310 Software Adobe PostScript Programming Language Software OverviewPostScript Interpreter LaserWriter Select 310 Driver TypesSelects the paper tray containing A4-size paper and sets Communication Device Parameters Software ParametersProduct Strings Compatibility OperatorsStatusdict Setting Compatibility Operators Device Defaulttimeouts Setting System ParametersCheckpassword IdlefontsProductA PrinternameProduct RamsizeSetpassword SetdefaulttimeoutsSetidlefonts Defaultpapertray Setting Page Device ParametersDefaultmultipurposetraysize SetprinternameMargins ManualfeedtimeoutManualfeed PagestackorderPapersize SetdefaultmultipurposepapertraysizePapertray Setdostartpage SetdefaultpapertraySetmargins Setpagetype SetpagestackorderSetpapertray Setjobtimeout Setting User ParametersJobtimeout JobnameWaittimeout Setting Device ParametersSetsoftwareiomode Softwareiomode Setting Communication ParametersPacketbackchannel Sccbatch SetpacketbackchannelSetsccbatch Setting Engine Device ParametersDarkness Currentcacheparams Setting Extensions to PostScript LevelSetdarkness CurrentpackingPackedarray SetcacheparamsPrinter Error Parameter SetpackingPrintererror PostScript Language ChangesPacked Arrays Versus Ordinary Arrays Packed ArraysCreating Packed Arrays Immediately Evaluated Names Device Resolution Images Changes in Font Cache OperationEnd-of-Line Recognition TrueType Fonts New OperatorsCommunication Channels Serial Communication Baud RatesFlow Control Parity SettingsDTR Flow Control SCC Operator Encoding XON/XOFF Flow ControlCommunication Protocols Simple Communication ProtocolBinary Communication Protocol SOH CTL-A Communicating with an IBM PC Parallel InterfaceSerial Interface DTR Flow Control for PC CommunicationCommunication Dynamics XON/XOFF Flow Control for PC CommunicationStatus Queries and Spontaneous Messages Errorerror OffendingCommand operator %%