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PEEK returns a byte value stored at a specified memory location.
POKE writes a byte value to a specified memory location.
 
PEEK(address)
POKE address,byte%
 
    ■ address    A byte position relative to the current segment address
                 set by DEF SEG; a value in the range 0 through 65,535.
    ■ byte%      A byte value to write to the specified memory location;
                 a value in the range 0 through 255.
 
Example:
    DEF SEG = 0
    Status% = PEEK(&H417)              'Read keyboard status.
    POKE &H417, (Status% XOR &H40)     'Change Caps Lock state, bit 6.
 
See Also    ◄DEF SEG►