Roland DXY-1100, Command Reference Manual

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5.3.2 Software Checking Handshake
The DXY-1000 series has a function to output the remaining buffer capacity to a computer.
By means of this function, the DXY-1000 sends data while checking the remaining buffer
capacity.
Example o f the softw are checking handshake:
100 ' D X Y - 1000 RS- 232C DEVICE CONTROL COMMAND
110 ' SAMPLE PROGRAM FOR SOFTWARE HANDSHAKE
120 OPEN "COMl : 9 6 0 0 , N , 8 ,1" AS #1
130 PRINT #1, CHR$( 2 7);" . M 1 00 ;; ; 13: " ;
140 '
MAIN PROGRAM
GOSUB 1 0 0 0
Main program for drawing
GOSUB 1000
END
1000 ' SUBROUTINE FOR BUFFER CHECK
1010 PRINT #1,CHR$(27); " . B " ;
1020 INPUT #1,B
1030 PRINT "Buffer space :";B
1040 IF B>=500 THEN RETURN
1050 GOTO 1010
Opens the RS- 232C port. Grammar varies depending on computers.
When the computer asks the DXY-1000 series to output, taking the delay
time the DXY-1000 series takes to respond to the computer as 100m/sec,
sets the terminator for data output from the DXY-1000 series to
[ESC]CHR$(13).
Commands the DXY-1000 series to output the remaining buffer capacity to
the computer.
Checks the remaining buffer capacity and commands the DXY-1000 series
to wait for data transmission.
In this sample program, the DXY-1000 series checks the remaining buffer capacity and con­
trols the data transmission between Line 1000 and Line 1050. Because of this, GOSUB
1000 must be executed to check the remaining buffer capacity, as needed, in the main pro­
gram. In other words, GOSUB 1000 must be executed so that incoming data do not
overflow the remaining buffer capacity before the next GOSUB 1000 is executed.
Explanation:
Line 120
Line 130
Line 1010
Line 1020
to
Line 1050
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