Commodore Plus 4 - Page 165

TROFF TROFF
This statement turns trace mode off.
— VOL VOL vo!ume level
Sets the current VOLume level for SOUND commands. VOLume
may be set from 0 to 8, where 8 is maximum volume, and 0 is off.
VOL affects both voices.
WAIT WAIT address, value 1 [, value 2]
The WAIT statement is used to halt the program until the contents of a
location in memory changes in a specific way. The address must be in
the range from 0 to 65535. Value 1 and value 2 must be in the range
from 0 to 255.
The content of the memory location is first exclusive-ORed with value 2
(if present), and then logically ANDed with value 1. If the result is zero,
the program checks the memory location again. When the result is not
zero, the program continues with the next statement.
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