readiodr.tmb for the DR51
Wait for any character at serial port, exit program if ESC.
Read digital inputs and send their byte value back. Can be
used with a host computer to make the DR51 a serial port
digital I/O data acquisition board.
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NEW
1 A=KEY
2 IF A=0 1
3 B=27
4 IF A=B 10
5 READDI
6 PRINT (A)
7 GOTO 1
10 END