I have one voltage which vary logarithmical.
How change the code below to show voltage on LCD in logarithm.(not linearity)

Code:
loop: 	
    ADCIN 0, adval					' Read channel 0 to adval (0-1023)

    adval = (adval */ 500)>>2		' equates to: (adval * 500)/1024

    LCDOut $fe,1,"DC Volts= "
    LCDOut DEC adval/100,".", DEC2 adval	 ' Display the decimal value
    Pause 500       				' Wait .5 second

    GoTo loop       				' Do it forever