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ESC G/ROM - Get MR350MKII's Flash ROM size
=> STX ESC G/ROM CS1 CS2 ADDR
<= STX ESC G/ROM <xxx> <zzz> CS1 CS2 ETX
where <xxx>= number of Kbytes of total memory
<zzz>= number of Kbytes of Free memory
=> ACK or NAK
ESC H - Hard Reset and initiate power on test
This command resets the MR350MKII terminal, and running
applications are halted. Power-on test routines are run and, if
completion is normal, the MR350MKII is ready for the next
command.
=> STX ESC H CS1 CS2 ADDR
<= ACK or NAK
ESC I - Get filename of current executing program
=> STX ESC I CS1 CS2 ADDR
<= STX ESC I <filename> CS1 CS2 ETX
if a program with filename is running in
terminal
STX ESC I <01> CS1 CS2 ETX
if no program is running
=> ACK or NAK
ESC J - Check if file existed or not
=> STX ESC J <filename> CS1 CS2 ADDR
<= STX ESC J <Retcode> CS1 CS2 ETX
where Retcode = 00 means file exist
= 01 means file not exist
=> ACK or NAK