I have a concern for you, in this bit of code
Code:
LOOP
PEEK CHSEL CHSELVAR
If CHSEL > CHSELVAR Then UP
Else 
PEEK CHSEL CHSELVAR
IF CHSEL < CHSELVAR Then DOWN
Else
GOTO Start
I think your intention is to set chselvar equal to the contents of address chsel. then in the next line you test to see if they are different. So if I am following this correctly, you will have to move the channel selector at the exact moment between the peek and the IF. May work better to set a var like chselvarold then on the next loop see if chselvar = chselvarold. if = then goto start, if not decode what to do.