Commodore 128D User Manual page 272

EXIT
FAST
A parameter that is not specified will retain its current value. Pulse
width applies to the width of the variable pulse waveform (wf = 2)
only and is determined by the formula pwout = pw/40.95. The
Commodore 128 has initialized the following 10 envelopes:
ENVELOPE
ENVELOPE
ENVELOPE
ENVELOPE
ENVELOPE
ENVELOPE
ENVELOPE
ENVELOPE
ENVELOPE
ENVELOPE
n
0,
1,
2,
3,
4,
5,
6,
7,
8,
9,
A D
0, 9,
S R
0, 0,
12, 0, 12, 0,
0, 15, 0,
0, 5,
9, . 4,
0, 9,
0, 9,
0, 9,
8, 9,
0, 9,
0,
5, 0,
4, 0,
2, 1,
0, 0,
9, 0,
4, 1,
0, 0,
Wf
2,
1
0
3
0
1
2,
2,
2,
0
pw
1536
512
2048
512
instrument
piano
accordion
calliope
drum
flute
guitar
harpsichord
organ
trumpet
xylophone
To play predefined musical instrument envelopes.you can simply
reference one of the envelope numbers above in a play command.
See PLAY.
See DO/LOOP
—Put machine in 2 MHz mode of operation
FAST
This command initiates 2MHz mode, causing the VIC 40-column
screen to be turned off. All operations (except I/O) are speeded up
considerably. Graphics may be used, but will not be visible until a
SLOW command is issued. The Commodore 128 powers up in 1 MHz
mode, and automatically selects 1 MHz mode for disk I/O, restoring
the mode when the operation is complete. Take care to select SLOW
mode when using FETCH, STASH or SWAP commands.
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264
BASIC 7.0 ENCYCLOPEDIA—Basic Commands and Statements
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