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A794 Owner’s Guide Chapter 6: Programming Information
March 1999 125
Erase All Flash Contents Except Boot Sector
Causes the entire flash memory to be erased.
The printer returns ACK if the command is successful; NAK if it is unsuccessful.
ASCII GS SO
Hexadecimal 1D 0E
Decimal 29 14
Exceptions
Available only in download mode.
Return Main Program Flash CRC
Returns the CRC calculated over the flash firmware code space. The format of the
response is ACK <low byte> <high byte>.
ASCII GS SI
Hexadecimal 1D 0F
Decimal 29 15
Erase Selected Flash Sector
Erases the previously selected sector. The printer transmits ACK when the sector has
been erased. If the previous sector is not successfully erased, or if no sector was selected,
the printer transmits NAK.
ASCII GS DLE n
Hexadecimal 1D 10 n
Decimal 29 16 n
Value and Range of n 0-2 = 256k bytes Flash
0-14 = 1M bytes Flash
0-30 = 2M bytes Flash
Exceptions
Available only in download mode.