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Lexmark 249X, 248X manual Computer to Printer Communication

Models: 249X 248X

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Computer to Printer Communication

The parallel interface transfers data from computer to printer. The data path is 8 bits wide. The printer and the computer synchronize data transfer with the interface signals STROBE*, ACKNLG*, and BUSY.

When the computer is ready to send a byte of data to the printer, the computer puts the byte of data on the data lines. Then the computer sends a STROBE* (low) pulse to the printer. The printer responds with a BUSY (high) signal.

After the printer receives the data, the printer pulses the ACKNLG* (low) line. This signals the computer that the printer has read the byte of data into printer memory. If the printer buffers are not full and the printer can receive more data, the printer removes the BUSY (low) signal.

92	Section 6: Using the Printer Interface

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Lexmark 249X, 248X manual Computer to Printer Communication

Contents

Forms Printer 248x/249x United States Government Restricted Rights Contents Page Epson Mode Printer Commands Barcodes Glossary Index Viii Introduction Physical Characteristics Width Height Depth WeightAvailable Options Options Part Number 2480 2481 2490 2491Mode 2480/2481 2490/2491 Print SpeedsPrinthead Description 248xPower Requirements Environmental ConditionsAlternating Current Line Voltage Power Power CordNoise Emission Value Following are noise emission values for your printerLength Paper Specifications2480/2490 Narrow Carriage Models 2481/2491 Wide Carriage Models Tractor Feeder continuous forms Manual Feed cut sheetsRibbon Specifications DiagnosticsPower-On Diagnostics Printer TestProgramming Examples Wend Introduction SIC Command Format Use the following formatInitial Values Description Bit Off Printer Dec HexParm Description Selection Dec Hex Parm Description Selection Dec Hex Parm Description Selection Dec Hex Parm Description Selection Dec Hex Code Symbol Description Value Name Dec Hex Control CodesPrinter Command Parameters Escape SequencesCommand Structure Example of IBM Emulation Mode Printer Command Select Code Page name of commandPrinter Command Quick Reference IBM Emulation Mode Function Command Dec Hex SeeFor more Information1B 5B 67 Ln Hn mode Mode data Data58 n1,n2 M3 m4Selecting a Character Set Select CodeSelect Character Set Usage NotesPrint From Code Continuously Print Characters from a CodeDownload a Character Set Print One CharacterUsage Note Located in the code page tables beginning onSelect Global Font Start low/start highPrestige Select Global FontGothic Script PresentorOrator Global Font and Size Parameters Global Font and CodePitch Dec Hs, Ls Hex Hs, Ls Code Decimal HexSelect 12 cpi Select Print ModeThis command sets the pitch at 12 cpi 249x Dec Hex Print Mode248x Select Print Type Style Dec Hex Height Line Space Dec HexUse this command for bold print To begin bold print Emphasized Bold PrintDouble-Strike Print To end bold printSuperscript or Subscript Set Print DirectionCancels double-wide printing mode Sets double-wide printing modeContinuous Double-wide Printing Score SelectContinuous Underline Continuous OverscoreSet Print Quality Decimal HexNormal Density Bit Image Graphics Bit Number Binary Value Print WiresGraphics Print Modes Horizontal Density Wires Mode and Horizontal Density 249x OnlyMode Dec Mode Dec Hex Horizontal Density Wires Dual-Density Bit Image Graphics Half SpeedDual-Density Bit Image Graphics Normal Speed High-Density Bit Image GraphicsSet Horizontal Tabulation Stops Set Default Tabulation StopsHorizontal Movement Move Current Print Position This command sets the left and right marginsSet Horizontal Margins Line Control Automatic Line Feed LFReverse Line Feed Move Paper VerticallyVertical Tabulation Set Vertical UnitsSet Vertical Tabulation Stops Sets as many as 64 tabulation stops by line numberLine Spacing Set Line Spacing to 1/8 InchSet Line Spacing to 7/72 Inch Activate Line Spacing for TextPorportional Space Mode This command turns porportional space mode on and offSet Line Spacing for Text Set Line Spacing for GraphicsSet Top of Form and Page Length Set Top of FormSet Page Length in Inches Set Page Length in LinesSet Skip Perforation Cancel Skip PerforationThis command cancels Set Skip Perforation ESC N Setup Barcode Parameter This command sets the barcode parameters to the printerPrinter Control Deselect PrinterUnit Module Width Dots Dec Hex Wire Barcode TypeSetup Barcode Data Dec Font Selection Name Dec Hex DescriptionSelect an International Character Set248x Select Near-Letter Quality Font249x Select Letter-Quality Font Select Character StyleAssign Character Tables Parameter rangeFunction Table/CodeText Print Mode Select Justification Begin or End Double-high PrintingDelete Text Off Dec Hex Print StylePin Graphics Mode 248x only Change Graphics Mode CommandNormal Density Bit Image Graphics Dual Density Bit Image GraphicsSet Graphics Mode Dots per Inch Density Dpi Equivalent CommandBackspace Horizontal TabSet Horizontal Tab Stops Set Absolute Print PositionVertical Movement Format Other Commands Setup Barcode Parameter Setup Barcode DataSelect Condensed Mode Define Download CharacersEpson Emulation Mode Printer Commands Character Set Select Standard Character SetSelect Block Graphics Character SetPrint from Code Code Page SetDecimal HexadecimalCharacter Size and Spacing Factor 112 Value Variable/FeatureCharacter Style Custom Characters Speed/Word Size Stored graphics data in one dot column bufferDots per inch/Density Backspace Carriage Return Execute Horizontal TabSet Horizontal Tabs by Characters Pitch 2480 2481Indent from Left Margin Set Horizontal Tabs by Dot ColumnsPitch Shift Increment Set Multiple Print Positions Move to the LeftMove to the Right Begin Uni-directional PrintingCancel Skip Over Perforation Set Page Length in InchesSet Page Length in Lines Select Skip Over PerforationCancels Half-speed Printing Cancel Paper-out SensorSelect Print Suppress Mode Cancel Print Suppress ModeEject Parallel Interface Parallel Interface Voltage LevelsComputer to Printer Communication 1329605 10 ft 1427498 20 ft Printer Pin ConnectionsComputer Parallel Pin Assignments Pin Line DescriptionTiming InitHow to Connect the RS-232C Serial Interface Universal Serial Bus InterfaceSerial Interface Serial Interface OptionFollowing illustration shows the RS-232C serial cable Pin Signal DescriptionSerial Cable Pin Assignments RS-232C Serial Interface Cable RS-232C Voltage Level Range Using an IBM AT Personal Computer RS-232CSerial Communication Parameters RS-232C 100 Serial Data Frame Considerations RS-232CData Transmission Start and Stop BitsData Flow Control Errors101 102 XON/XOFF Protocol TimingSerial Computer Configuration Recommendations RS-232C 103OS/2 1.2 OS/2 2.0104 How Dots Are Added in NLQ Mode 248x PrintersDesigning Draft and NLQ Characters 105106 Vertical Lines107 Intersections of Vertical and Horizontal Lines108 Diagonal Intersecting Horizontal Line109 Designing Fast Draft Characters Designing NLQ II CharactersDownloading Characters 110 Initializing the Download AreaDownloading a Draft/NLQ Character Set Part One Calculating Count 1, CountBit Bit Values Functions 111Part Two Specifying the Download Data 112 PrintableDesigning and Downloading the Draft/NLQ Copyright Symbol 113114 115 Downloading an NLQ II Character Set116 Printable Data 117Bit Functions 118 119 249x Printers Designing and Downloading Characters120 Downloading a New FontDesign Considerations 121Font Descriptor Byte 122 Download Sequence123 Lookup Table Managing the Download Area124 Designing Monospaced Fast Draft Characters 125126 MSB LSBCreating the Character Data Use the following command to initialize the download area127 128 Downloading the Character DataDownloading the Font Descriptor Byte For more information about the Font Descriptor Byte, see129 Creating the Lookup Table DataDownloading the Lookup Table Data Send the following lookup table information to the printerPrinting the Character Designing Monospaced Draft Characters130 131 LSB MSB132 Initializing the Download Data133 134 Designing Proportionally Spaced Characters 135136 LSB MSB137 Compressing the Character138 139 Send the following lookup table example to the printer140 Designing Enhanced Letter Quality Characters 141142 143 1FFFF0144 145 146 Barcodes Barcode FunctionBarcode Setup Command 149 Is a space module Is a bar moduleBarcode Type Value 248x 249xIs the space width adjustment factor Value 248x space 249x space Module adjustment151 Minimum Minimum v1 Printer Model Value ValuesData Transfer Command Barcode Symbologies 15313, x0D 12, x0CN2 value Data character set Character HexValid EAN-13 command 155Invalid EAN-13 command N2 valueValid EAN-8 command 157Barcodes 159 To 255, x01 to xFFX53 Valid Code 39 command 161Invalid Code 39 command Lowercase ’a’ is not a valid data character for Code163 Interleaved 2of5Valid Interleaved 2of5 command 11, x0B Invalid Interleaved 2of5 command165 Valid UPC-A command 167 N1 value b0=1 CharacterValid Postnet command 169Postnet ’-’ dash is an invalid character for Postnet171 To 255, x02 to xFFData character sets Function HexHex Character Code 173Data character set a Data character set B 175 Data character set CValid Code 128 command Invalid Code 128 command 177Valid Code 128 command using multiple character sets 179 X0005 181 Example 183 Space width adjustment = default 185 Barcodes Code Pages Code Code Page 437G 189Code 191 Code Code Page 853T 193Code 195 Code 197 Code 199 Code 201 Code 203 Code Command Printing a Code205 Output from the previous example is shown belowSet Font Global, ESC 207 248x Font Global IDs FGIDs Decimal, Hex and Byte DecimalGothic 209 249x Font Global IDs FGIDs Decimal, Hex and Byte DecimalPitch 211 Decimal Hex Code 213 Print Quality Decimal HexInteraction of Set Font Global and Set Print Quality Select Fast DraftCharacter Sets 1 215Character Set 217 Code Pages Glossary Glossary Numerics Data flow control RS-232C Data frames serial Data packetsSee serial adapter Index Index Reader’s Comment Form Business Reply Mail