Select Double-Density Graphics | Epson A794-D100 guide

A794 Owner’s Guide

Chapter 6: Programming Information

Select Double-Density Graphics

Enters one line of 8-dot double-density graphics into the print buffer. Any print command is required to print the line, after which the printer returns to normal processing mode. Double-density mode allows 0-576 dot columns. The number of bytes sent is represented by the formulas in the table.

Each bit corresponds to one horizontal dot. Compare to Set Bit Image Mode (1B 2A, m=1) earlier in this document.

ASCII	ESC Y n1 n2 d1 ... dn
Hexadecimal	1B 59 n1 n2 d1 ... dn
Decimal	27 89 n1 n2 d1 ... dn

Value of n

Value of n (8-Dot	Value of n (24-Dot Single
Single Density Mode)	Density Mode)	Value of d
n1 + (256 x n2)	3 x [n1 + (256 x n2)]	Number of Bytes of Data
		(Printed Down, Then Across)

Formulas

See the above table.

March 1999

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Image 89

Epson A794-D100 manual Select Double-Density Graphics

Contents

Owners Guide Page Disclaimer Legal Notices Power Supply Contents Programming Information Communication Interface Description of Printer Models Available InstallationsFeatures Options Description of Printer Communication Interfaces Models AvailableModel Identification Setting up the printer Installations On a Flat Surface Vertically see note Features Options Printer Controls Changing Paper Testing the Printer Using the Printer Paper Feed Button Reset ButtonPrinter Controls Tone Changing Paper A794 Owner’s Guide Paper jams Troubleshooting the Printer Testing the Printer Poorly printed test printout Troubleshooting the Printer Printer Tone and Green LED Troubleshooting the Printer Printer Does Not Work Printing Problems Ordering Miscellaneous Supplies Ordering Thermal Paper How to Order Thermal Paper SpecificationsOrdering Thermal Paper Manufacturers Ordering Cash Drawers Ordering Power Supply and Power CordOrdering Miscellaneous Supplies Wall-Mount Kit Ordering Communication Cables Character Sets Paper Specifications Print ZonesCharacters Print Modes CharactersSize Standard Print Zones for 80 mm Paper Paper SpecificationsPrint Zones Print Zones for 82.5 mm Paper Code Character Sets Code Code Code Code Code Code Code RS-232C Interface Communication Overview Using DOS to Send Commands Sending CommandsUsing Basic to Send Commands Communication Overview Print Speed and Timing RS-232C Interface DTR/DSR Protocol XON/XOFF Protocol Communication Connectors RS-232C Technical SpecificationsPower Connector Pin DB-9 Connector Pin DB-25 Connector RS-232C Settings Cash Drawer Connector Parallel Interface Ieee Bi-directional Parallel Connector Communication Interface Programming Information List of Commands Comparisons Command Descriptions Programming Information List of Commands 26 s c1 c2 n1 d1...nn dn NL nH 1D 2A n1 n2 d1...dn Comparisons Command Conventions Command Descriptions Clear Printer Printer Function CommandsPerform Full Knife Cut Hexadecimal Decimal Exceptions Generate Tone Perform Partial Knife CutHexadecimal Decimal Formulas Value of n Select Print Mode Initialize Printer Hexadecimal Decimal DefaultSelect Peripheral Device for Multi-Drop Range of n Select Paper Sensors to Output Paper End SignalsDefault of n Exceptions Select Sensors to Stop Printing Enable or Disable Panel Button Generate Pulse to Open Cash Drawer Read from Non-Volatile MemoryRange of k Value of p1 Write to Non-Volatile Memory Nvram Select Cut Mode and Cut PaperValue of n1 Value of n2 Print and Feed One Line Vertical Positioning and Print CommandsActivate Carriage Return Feed n Print Lines Add n Extra Dot Rows Range of n DefaultFeed n Dot Rows Set Line Spacing to 1/6 Inch PrintSet Column Print and Feed Paper Set Line Spacing Print and Feed n Lines Set Right-Side Character Spacing Horizontal Positioning CommandsHorizontal Tab Set Absolute Starting Position Set Horizontal Tab Positions Value of k Default Set Relative Print Position Compatibility Information A794 receipt vs. A793 receipt Select Justification Range of nH Set Left MarginRange of nL GS P x y Set Horizontal and Vertical Minimum Motion Units Set Printing Area Width Select Single-Wide Characters Print Characteristics CommandsSelect Double-Wide Characters Hexadecimal Decimal Related Information Select 90 Degree Counter-Clockwise Rotated PrintSelect Pitch Column Width Select Character Set Values and Ranges Define User-Defined Character Set Select or Cancel Underline Mode ESC 0 0 Cancel User-Defined CharacterCopy Character Set from ROM to RAM Select or Cancel Double Strike Select or Cancel Emphasized Mode Select Character Code Table Select or Cancel Italic Print Select International Character Set Select or Cancel 90 Degree Clockwise Rotated PrintSelect or Cancel Upside-Down Print Mode Select or Cancel Smoothing Mode Select Or Cancel White/Black Reverse Print Mode Summary of Rotated Printing Select Superscript or Subscript Modes Print Raster Graphics Graphics CommandsDownload BMP Logo Hexadecimal Decimal Value = Number of dots to be moved from the beginning of the line Select Bit Image Mode Select Single-Density Graphics Select Double-Density Graphics Select the Current Logo Ranges Define Downloaded Bit Image Convert 6 Dots/mm Bitmap to 8 Dots/mm Bitmap Print Downloaded Bit ImageHexadecimal 1D 2F m Decimal Value and Range of m Printer Status Commands Transmit Peripheral Device Status RS-232C printers only Request Alternate Status parallel printers only Hexadecimal Decimal Values Transmit Paper Sensor Status Hexadecimal 1D 49 n Decimal Transmit Printer ID Values of n Transmit Printer ID, Remote Diagnostics Extension Programming Information A794 Owner’s Guide Select or Cancel Automatic Status Back ASB Default ASB disabled Exceptions Undefined Off Not used. Fixed to off Transmit Status When n is out of the specified range, the command is ignored AX t Send Printer Software VersionPrint Test Form Rules for Using Real Time Commands Real Time Commands Moving Data through the Buffer Busy Line and Fault Conditions Recognizing Data from the Printer Real Time Request to Printer Related Information = Transmit Printer Status Real Time Status Transmission = Transmit RS-232C Busy Status = Transmit Error Status = Transmit Receipt Paper Status Hexadecimal Decimal Value of Byte Real Time Printer Status Transmission Select Pitch of HRI Characters Bar Code CommandsSelect Printing Position of HRI Characters Print Bar Code Select Bar Code Height UPC-A Select Bar Code Width Default Formulas Print and Return to Standard Mode Mode CommandsCancel Print Data in Page Mode Hexadecimal 0C Decimal Exceptions Select Page Mode Print Data in Page ModeHexadecimal 1B 0C Decimal Exceptions Hexadecimal 1B 4C Decimal Exceptions Ascii ESC S Select Standard Mode Default Exceptions Select Print Direction in Page Mode Set Print Area in Page Mode Select Character Size Set Absolute Vertical Print Position in Page Mode Set Relative Vertical Print Position in Page Mode Hexadecimal 1D 3A Decimal Formulas Macro CommandsSelect or Cancel Macro Definition Value of t Execute MacroValue of r Printer operation Flash Download Commands Return Boot Sector Firmware Part Number Switch to Flash Download ModeReturn Segment Number Status of Flash Memory ESC Select Flash Memory Sector to Download Return Boot Sector CRCGet Firmware CRC Range of n Exceptions Erase Selected Flash Sector Erase All Flash Contents Except Boot SectorReturn Main Program Flash CRC Ch * 256 + cl Ffff hexadecimal Download to Active Flash Sector March 127 Erase User Flash Sector Reset Firmware Basic Index 130 March March 131 132 March