XON/XOFF DC1/DC3, Dtr | Compaq LA36 guide

Interface Information

Buffer Control	Description

XON/XOFF (DC1/DC3)	When the printer is ready to receive data, it sends the XON
	(DC1) code (hex 11). When fewer than 255 bytes of space
	remain in the buffer (or when the printer is taken offline), the
	printer sends the XOFF (DC3) code (hex 13). (When the input
	buffer is configured for 256 bytes, the buffer limit is reduced
	from 255 bytes to 63 bytes.) The computer must stop
	transmitting data within 255 (63) characters of receiving the
	XOFF code, or information may be lost. If the paper runs out,
	the printer sends an NAK code (hex 15).

DTR	DTR is a hardware buffer control; that is, the Ready Out signal
	on interface cable pin 1 (DTR) is used to control the flow of
	data rather than the transmission of a character code. When the
	printer is ready to receive data, pin 1 is high. When fewer than
	255 (63) bytes of space remain in the buffer (or when the printer
	is taken offline), pin 1 is low. The computer must stop
	transmitting data within 255 (63) characters of DTR being low,
	or information may be lost.

D-6

Image 154

Compaq LA36 user manual XON/XOFF DC1/DC3, Dtr

Contents

Compaq Matrix Printer LA36 Page Table of Contents Printing Supplies and Options Resident Fonts Glossary GL-1 Index IN-1 Preface Organization Maintenance Viii Introduction Options Paper Handling 1812 Parts of the Printer Front View Operations of the Control Panel Basic States of the Printer Control Panel Operations Will turn blinking Printer Acoustical Feed-Backs Paper Specifications Paper SizeSelecting Paper Paper Thickness and Number of Copies Control panel Buttons Paper select lever Font indicators Paper thickness leverOverview of Paper Operations Ready state but not receiving or printing data Pause state Levers and Buttons Used for Paper Handling AdjustingforPaperThickness Paper Thickness Lever Positions Using Single SheetsCopy Copies Ribbon replacement Loading a Single Sheet of Paper Setting Paper Select Lever and Left Paper Guide Ejecting Single Sheets UsingContinuousForms Positioning the Paper Stack Loading Continuous Forms Push Tractor and Rear Feed Positioning the Tractor Using the Tractor Guide Adjusting Paper Tension Loading Continuous Forms Pull Tractor and Bottom Feed Better manipulate the metallic parts of the tractor unit Removing the Tractor Unit Installing the Tractor Unit for Pull-tractor Feed Passing Continuous Forms Paper From Under the Printer Setting Continuous Forms Paper on the Tractors Recovering from an Unexpected Unloading Operation Unloading Continuous Forms Push-Feed ModeTearing Off Continuous Forms Automatic-Tear-Off Advancing Manual Tear-Off Advancing Feeding and Positioning Paper Print Area Definition Abcdefghij ··· Top-of-Form Adjustment Line Feed/Form Feed Switching Paper Types Switching between Push-Feed and Pull-Feed Tips on Paper Handling Turn the printer off Multipart Forms Use the no Tear value of the Tear option in the Set-Up modeGeneral Tips Envelopes Selecting Print Features Printing Using Commercial Software Using the Control Panel Selecting Macro 1 or Macro DEC Macro 1 and Macro 2 SettingsEpson IBM IBM mode DEC modeIBM&Epson mode Epson mode Menu Access Settings Installation SettingsAdjustments Settings Menu access Selecting a Resident Font Changing the Protocol Stopping and Viewing Printing Starting or Stopping PrintingStarting Printing Resuming Printing Removing Single Sheets Removing Printed PagesRemoving Continuous Forms Using Set-Up Mode What is Set-Up Mode for? Entering the Set-Up Mode How Set-Up Works OFF on Initial Printout in the Set-Up Mode Overview of the Set-Up Mode Set-Up Mode Functions Options with Pre-determined Values DEC Select the Macro 2 function Enter the Set-Up modeExample Changing theVertical Pitch Print the menu of the vertical pitch option Options with Undetermined Values Example Changing the Left Margin Print the menu of the left margin option Options with Both Pre-determined and Undetermined ValuesChange the left margin from column 1 to column Summary of the Set-Up Mode Printing the Printer Configuration Points to Remember Printout of Factory Settings Using the Print Function Deciding Which Options to Change Required Options Install Baud Rate BIT&PARITY Buffer CTL Disc Fault Changing Macro 1 and Macro 2 Options Macro 1 and Macro 2 Options List Macro 1 and Macro 2 Options and Values Hsdraft Prtcl ParlFont HI-IMPACT Left Margn Line ModeForm Lengh Form Width Rsvd Paper SRCManual Print DIR Unidir Auto Wrap Truncate DEC PRT IDLA50 ID EOT Discon Finnish DEC G0 CSTBritish French Latin HB User PrefLatin Latin GK Turkey Deflt SETCP DHN Ecma IBM AGM IBM SETDBL Higt CHR SET ChangingInstallOptions Install Options List Install Options and Values Provided. If you need a larger capacity for Input buffer, a minimal download buffer isDownloading fonts, reduce the input buffer Number of data bits Parity bit Fnfold ADJ AdjustingTop-of-FormOriginAdjust Options and Values Mnual ADJ Exiting and Saving ChangingMenuAccessOptionsMenu Access Option and Values LF and FF/Load buttons at the same time. Using the Diagnostic Functions RecallingFactorySettingsPrinting Test Exit the Hex Dump mode Hex Dump ModeStart the Hex Dump mode select the HEX-DUMPoption Print the hex dump Sample Hex Dump Set-Up Mode Quick Reference Setup Mode MACRO1 MACRO2 Print Install Adjust Tests RCALL-FACT MENU-ACCES SAVE&EXIT Using Set-Up Mode Cleaning Cleaning and Vacuuming the Printer Cleaning the Platen and Paper Bail Rollers Cleaning the Print Head Replacing the Ribbon Cartridge Remove the new ribbon cartridge from its package and install Replacing the Print Head Maintenance Solving problems Print Quality Problems and Solutions Thickness of your paper. See the Paper Thickness Top margin is wrong Paper Handling Problems and Solutions Paper cannot be loaded or fed Operating Problems and Solutions Depressed DiagnosticFunctions Printer Failures CheckingVerticalAlignment Adjust the vertical print alignment at Letter quality speedStart the vertical alignment test Vertical Alignment Adjustment Exit the vertical alignment function Supplies Options InstallingOptions Installing the Color Kit PhysicalSpecifications FunctionalSpecifications Fonts Character setsBarcode PerformanceSpecifications PaperSpecifications Print Area Print Area for Continuous Forms Paper Thickness Do not use in high humidity environments Command Sets DEC PPL2 Quick Reference Guide Escape 1/11, introduces an escape sequence ConventionsControl string C1 Control Code Positioning ControlsC0 Control Code CSI Pn ... Pn u Sheet Size and Margins Type Size and Spacing, Managing Implicit Cursor Motion Font Management and Attribute Selection CSI Pn . . . Pn TabsCSI Pn . . . Pn u TBC Selecting Character Sets SCS Final Characters Ascii Reports CSI Ps n DCS Ps Pn2 Pn3String ST Brief CSI Ps n Miscellaneous Decsbca Barcode PrintingDecbar CSI Ps1 Pn2 Sixel Graphics Device Control String Envelope Sixel Graphics Protocol Selector Ps1 Sixel Graphics Grid Size defined by Pn3 Pn1 Pn2 Pn3 Pn4 Sixel Graphics Control CodesPc Pu Px Py Pz Standard 8-bit Code Table Left Half Standard 8-bit Code Table Right Half Designating and Invoking Character Sets National Replacement Character Sets ISO JIS Print Mode Control IBM Proprinter X24E and XL24E Quick Reference Guide Vertical Control Horizontal ControlESC Tabulation Color Selection FormattingCharacter Set Control Downloading CanDC1 Bit Image Graphics ESC EM E Cut Sheet Feeder ControlESC EM ESC EM R Epson ESC/P2 Quick Reference Guide ESC M ESC P Line feed Form feed Advance paper n/180 inch 1 £ n £ ESC J n £ d1 £ 255 0 £ d2 £ Character codes £ character codes £ Timeless Nimbus Sans Courier Set scalable font mode Font Selection and Downloading ESC @ Function Command Interface Information Parallel Interface Centronics Compatible signals Ieee 1284-B Nibble Mode signals To printer HostClk High in reverse data transfer phase Serial Interface Serial Options Cable WiringBuffer Control XON/XOFF DC1/DC3 DTR Character Sets DEC PPL2 Protocol Character Sets Character Sets Character Sets Character Sets Character Sets Character Sets Character Sets Character Sets Character Sets Character Sets Character Sets Character Sets Character Sets Character Sets Character Sets Character Sets Character Sets Default Sets Code Code Turkish Ecma ISO Latin Hungarian Slovenian Polish Mazowian Kamenicky Cyrillic Elot Latin Polish Lithuanian Macedonian IBM Set 1/2 IBM Proprinter X24E and XL24E ProtocolIBM Set National Character Sets Epson ESC/P2 ProtocolCommon Characters National Characters Character Sets Resident Fonts Timeless outline Nimbus Sans outline Glossary Carriage Return CR Dpi Line Spacing Pitch Tear Bar Autoansbk Disc FaultAnswer ENQ BIT&PARITY Bottom MRG Form Lengh Error BeepEOT Discon Horz Pitch Recovering form an Unexpected Unloading Operation Vert Pitch International Standards Conformity