HP 7470A Interfacing And Programming Manual page 160

The following flow diagram illustrates the functional elements of a
typical software checking handshake within a user's program.
START
PREPARE BLOCK
OF DATA FOR TRANS­
MISSION TO PLOTTER
&
SEND OUTPUT
r———fi BUFFER COMMAND
ESC.B TO PLOTTER
i
RECEIVE ESC.B RE­
SPONSE AND ENTER
BUFFER SPACE DATA
INTO PROGRAM
SPACE TO
SEND ENTIRE
DATA BLOCK?
SEND DATA
BLOCK TO PLOTTER
ANY
MORE DATA
FOR PLOTTER?
YES
10-18 RS-232-C/CCITT v.24 INTERFACING