M-S Cash Drawer A794 - Manual (Page 142)

A794 Owner’s Guide Chapter 6: Programming Information
December 1999 137
Return Microprocessor CRC
ASCII GS BEL
Hexadecimal 1D 07
Decimal 29 7
Returns the CRC calculated over the boot sector code space.
Formulas
ACK <low byte> <high byte>
Erase All Flash Contents Except Boot Sector
ASCII GS SO
Hexadecimal 1D 0E
Decimal 29 14
Causes the entire Flash Memory to be erased.
The printer returns ACK if the command is successful; NAK if it is unsuccessful.
Exceptions
Available only in Download Mode.
Return Main Program Flash CRC
ASCII GS SI
Hexadecimal 1D 0F
Decimal 29 15
Returns the CRC calculated over the Flash firmware code space. The format of the
response is ACK <low byte> <high byte>.
Erase Selected Flash Sector
ASCII GS DLE n
Hexadecimal 1D 10 n
Decimal 29 16 n
Value and Range of n: 0-7 = 512k bytes Flash
0-15 = 1M bytes Flash
0-31 = 2M bytes Flash
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.
Exceptions
Available only in Download Mode.