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Epson A794-D100 Select Flash Memory Sector to Download, Get Firmware CRC, Return Boot Sector CRC

Models: A794-D100

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Chapter 6: Programming Information

A794 Owner’s Guide

Select Flash Memory Sector to Download

Selects the flash sector (nn) for which the next download operation applies. The values of the possible sector are restricted, depending upon the flash part type. The printer transmits an ACK if the sector number is acceptable or an NAK if the sector number is not acceptable. Sector numbers start at 0

ASCII	GS STX nn
Hexadecimal	1D 02 nn
Decimal	29 2 nn
Value of n	the flash sector to which the next download operation applies
Range of n	0

Exceptions

Available only in download mode.

Get Firmware CRC

Causes the printer to calculate the CRC for the currently selected sector and transmits the result. This is performed normally after downloading a sector to verify that the downloaded firmware is correct. The printer also calculates the CRC for each sector during power up and halts the program if any sector is erroneous.

The printer transmits ACK if the calculated CRC is correct for the selected sector; NAK if the CRC is incorrect or if no sector is selected.

ASCII	GS ACK
Hexadecimal	1D 06
Decimal	29 6

Return Boot Sector CRC

Returns the CRC calculated over the boot sector code space.

ASCII	GS BEL
Hexadecimal	1D 07
Decimal	29 7

Formulas

ACK <low byte> <high byte>

124	March 1999

Image 130

Epson A794-D100 Select Flash Memory Sector to Download, Get Firmware CRC, Return Boot Sector CRC, Range of n Exceptions

Contents

Owners Guide Page Legal Notices DisclaimerPower Supply Contents Communication Interface Programming InformationFeatures Options InstallationsDescription of Printer Models Available Description of Printer Model Identification Models AvailableCommunication Interfaces Installations Setting up the printerFeatures On a Flat Surface Vertically see noteOptions Using the Printer Printer Controls Changing Paper Testing the PrinterPrinter Controls Reset ButtonPaper Feed Button Tone Changing Paper A794 Owner’s Guide Paper jams Troubleshooting the Printer Testing the Printer Poorly printed test printout Troubleshooting the Printer Troubleshooting the Printer Printer Tone and Green LEDPrinting Problems Printer Does Not WorkOrdering Thermal Paper Ordering Miscellaneous SuppliesOrdering Thermal Paper Thermal Paper SpecificationsHow to Order ManufacturersOrdering Miscellaneous Supplies Ordering Power Supply and Power CordOrdering Cash Drawers Ordering Communication Cables Wall-Mount KitCharacters Paper Specifications Print ZonesCharacter Sets Size CharactersPrint Modes StandardPrint Zones Paper SpecificationsPrint Zones for 80 mm Paper Print Zones for 82.5 mm Paper Character Sets CodeCode Code Code Code Code Code Code Communication Overview RS-232C InterfaceUsing Basic to Send Commands Sending CommandsUsing DOS to Send Commands Communication OverviewRS-232C Interface Print Speed and TimingXON/XOFF Protocol DTR/DSR ProtocolPower Connector RS-232C Technical SpecificationsCommunication Connectors Pin DB-9 Connector Pin DB-25 ConnectorCash Drawer Connector RS-232C SettingsIeee Bi-directional Parallel Connector Parallel InterfaceCommunication Interface List of Commands Comparisons Command Descriptions Programming InformationList of Commands Programming Information26 s c1 c2 n1 d1...nn dn NL nH Comparisons 1D 2A n1 n2 d1...dnCommand Descriptions Command ConventionsPerform Full Knife Cut Printer Function CommandsClear Printer Hexadecimal Decimal ExceptionsHexadecimal Perform Partial Knife CutGenerate Tone Decimal FormulasSelect Print Mode Value of nSelect Peripheral Device for Multi-Drop Hexadecimal Decimal DefaultInitialize Printer Default of n Exceptions Select Paper Sensors to Output Paper End SignalsRange of n Enable or Disable Panel Button Select Sensors to Stop PrintingRange of k Read from Non-Volatile MemoryGenerate Pulse to Open Cash Drawer Value of p1Value of n1 Select Cut Mode and Cut PaperWrite to Non-Volatile Memory Nvram Value of n2Activate Carriage Return Vertical Positioning and Print CommandsPrint and Feed One Line Feed n Print LinesFeed n Dot Rows Range of n DefaultAdd n Extra Dot Rows Set Column PrintSet Line Spacing to 1/6 Inch Set Line Spacing Print and Feed PaperPrint and Feed n Lines Horizontal Tab Horizontal Positioning CommandsSet Right-Side Character Spacing Set Absolute Starting Position Value of k Default Set Horizontal Tab PositionsSet Relative Print Position Select Justification Compatibility Information A794 receipt vs. A793 receiptRange of nL Set Left MarginRange of nH Set Horizontal and Vertical Minimum Motion Units GS P x ySet Printing Area Width Select Double-Wide Characters Print Characteristics CommandsSelect Single-Wide Characters Select Pitch Column Width Select 90 Degree Counter-Clockwise Rotated PrintHexadecimal Decimal Related Information Select Character Set Define User-Defined Character Set Values and RangesSelect or Cancel Underline Mode Copy Character Set from ROM to RAM Cancel User-Defined CharacterESC 0 0 Select or Cancel Emphasized Mode Select or Cancel Double StrikeSelect or Cancel Italic Print Select Character Code TableSelect or Cancel Upside-Down Print Mode Select or Cancel 90 Degree Clockwise Rotated PrintSelect International Character Set Select Or Cancel White/Black Reverse Print Mode Select or Cancel Smoothing ModeSelect Superscript or Subscript Modes Summary of Rotated PrintingDownload BMP Logo Graphics CommandsPrint Raster Graphics 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 Define Downloaded Bit Image RangesHexadecimal 1D 2F m Decimal Print Downloaded Bit ImageConvert 6 Dots/mm Bitmap to 8 Dots/mm Bitmap Value and Range of mPrinter Status Commands Request Alternate Status parallel printers only Transmit Peripheral Device Status RS-232C printers onlyTransmit Paper Sensor Status Hexadecimal Decimal ValuesTransmit Printer ID Hexadecimal 1D 49 n DecimalTransmit Printer ID, Remote Diagnostics Extension Values of nProgramming 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 Print Test Form Send Printer Software VersionAX t Real Time Commands Rules for Using Real Time CommandsBusy Line and Fault Conditions Moving Data through the BufferRecognizing Data from the Printer Real Time Request to Printer Real Time Status Transmission Related Information = Transmit Printer Status= Transmit Error Status = Transmit RS-232C Busy Status= Transmit Receipt Paper Status Real Time Printer Status Transmission Hexadecimal Decimal Value of ByteSelect Printing Position of HRI Characters Bar Code CommandsSelect Pitch of HRI Characters Select Bar Code Height Print Bar CodeUPC-A Default Formulas Select Bar Code WidthCancel Print Data in Page Mode Mode CommandsPrint and Return to Standard Mode Hexadecimal 0C Decimal ExceptionsHexadecimal 1B 0C Decimal Exceptions Print Data in Page ModeSelect Page Mode Hexadecimal 1B 4C Decimal ExceptionsSelect Standard Mode Ascii ESC SSelect Print Direction in Page Mode Default ExceptionsSet Print Area in Page Mode Select Character Size Set Absolute Vertical Print Position in Page Mode Set Relative Vertical Print Position in Page Mode Select or Cancel Macro Definition Macro CommandsHexadecimal 1D 3A Decimal Formulas Value of r Execute MacroValue of t Flash Download Commands Printer operationReturn Segment Number Status of Flash Memory Switch to Flash Download ModeReturn Boot Sector Firmware Part Number ESCGet Firmware CRC Return Boot Sector CRCSelect Flash Memory Sector to Download Range of n ExceptionsReturn Main Program Flash CRC Erase All Flash Contents Except Boot SectorErase Selected Flash Sector Download to Active Flash Sector Ch * 256 + cl Ffff hexadecimalMarch 127 Reset Firmware Erase User Flash SectorIndex Basic130 March March 131 132 March