Sccbatch, Setpacketbackchannel | Apple 310 instruction

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

Image 46

Apple 310 manual Sccbatch, Setpacketbackchannel

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 Contains Conventions Used in This Note Other Reference Material For More Information ApdaPage LaserWriter Select Hardware1 LaserWriter Select 310 Hardware ROM Communication Ports Serial Port for RS-232C Devices Centronics Parallel Connector 2An 8-pin serial port connector Pstrobe Signal Status Lights Memory Capabilities ROM Capability Basic Operation Batch ModeDram Expansion Interactive Mode Types Paper Handling 7Paper handling options Page LaserWriter Select 310 Software Adobe PostScript Programming Language Software OverviewPostScript Interpreter LaserWriter Select 310 Driver Types Selects the paper tray containing A4-size paper and sets Communication Device Parameters Software ParametersProduct Strings Compatibility Operators Statusdict Setting Compatibility Operators Device Defaulttimeouts Setting System ParametersCheckpassword Idlefonts ProductA PrinternameProduct Ramsize Setpassword SetdefaulttimeoutsSetidlefonts Defaultpapertray Setting Page Device ParametersDefaultmultipurposetraysize Setprintername Margins ManualfeedtimeoutManualfeed Pagestackorder Papersize SetdefaultmultipurposepapertraysizePapertray Setdostartpage SetdefaultpapertraySetmargins Setpagetype SetpagestackorderSetpapertray Setjobtimeout Setting User ParametersJobtimeout Jobname Waittimeout Setting Device ParametersSetsoftwareiomode Softwareiomode Setting Communication ParametersPacketbackchannel Sccbatch Setpacketbackchannel Setsccbatch Setting Engine Device ParametersDarkness Currentcacheparams Setting Extensions to PostScript LevelSetdarkness Currentpacking Packedarray Setcacheparams Printer Error Parameter Setpacking Printererror PostScript Language Changes Packed Arrays Versus Ordinary Arrays Packed ArraysCreating Packed Arrays Immediately Evaluated Names Device Resolution Images Changes in Font Cache Operation End-of-Line Recognition TrueType Fonts New Operators Communication Channels Serial Communication Baud Rates Flow Control Parity SettingsDTR Flow Control SCC Operator Encoding XON/XOFF Flow Control Communication Protocols Simple Communication Protocol Binary Communication Protocol SOH CTL-A Communicating with an IBM PC Parallel Interface Serial Interface DTR Flow Control for PC Communication Communication Dynamics XON/XOFF Flow Control for PC Communication Status Queries and Spontaneous Messages Errorerror OffendingCommand operator %%