Canon X-07 User Manual page 105

10 INIT#1, "COM: "
20 INIT#2, "OPT:"
30 OUT#1, 65
At Line 1 0, file number # 1 is assigned to a serial 1/0 device. At Line 20, you
probably think that file number #2 is assigned to an optical coupler.
However, when this program is executed, an error message is displayed. This is
because, when file number # 2 is assigned to the serial 1/0 device, file number
# 1 is canceled.
Now, the X-07 uses the baud rate generator to output sound through the com­
pact magnetic speaker. For this reason, when the INIT# instruction is used
along with the BEEP instruction, an error similar to the above example occurs.
10 INIT#1, "COM:"
20 BEEP 5, 10
30 A=INP(#1)
At Line 1 0, file number # 1 is assigned to a serial 1/0 device. However, at
Line 20, when the BEEP statement is executed, the assigned file number # 1 is
canceled, and an error is generated at Line 30.
Same thing occurs when the BEEP instruction is executed before the INIT #
instruction.
10 BEEP 5,10
INIT
20
#
30 A=INP(#1)
In the above example, no sound is heard. The BEEP statement specifies the
tone and the length of the tone that the baud rate generator should produce.
When the X-07 has finished specifying these parameters, it executes the follow­
ing statement. It does not wait for the sound to be output before executing the
following statement. Therefore, the above example should be:
10 BEEP 5,10
20 BEEP 0,1
30 INIT#1,"COM:"
40 A=INP (#1)
The BEEP statement at Line 20 is a "dummy" statement which delays the
execution of Line 30.
96
1, "COM:"
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