Commodore Plus 4 - Page 162

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multicolor mode X = 0 to 159 Y = 0 to 199
high resolution mode 0 to 319 0 to 199
Scaling can be turned off by entering 'SCALE 0'.
SCNCLR SCNCLR
Clears the current screen, whether graphics, text, or both
(split screen).
SOUND SOUND voice #- frequency control, duration
This statement produces a SOUND using one of three voices with a
frequency control in the range 0 - 1023 for a duration of 0 - 65535
60thsof a second.
V Voice
Voice 1 (tone)
Voice 2 (tone)
Voice 2 (white noise)
If a SOUND for voice N is requested, and the previous SOUND for the
same N is still playing, BASIC waits for the previous SOUND to com
plete. SOUND with a duration of 0 is a special case. It causes BASIC
to turn off the current SOUND for that voice immediately, regardless
of the time remaining on the previous SOUND. See the MUSIC NOTE
TABLE (SECTION 11) for the frequency control values that correspond
to real notes.
EXAMPLE:
SOUND 2, 800, 360
Plays a note using
voice
2 with fre
quency set at 800
for one minute
SSHAPE GSHAPE SSHAPE and GSHAPE are used to save and restore rectangular areas
of multicolor or high resolution screens using BASIC string variables.
The command to save an area is:
SSHAPE string variable, a1,b1 [,a2,b2\
string variable String name to save data in
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