[Color Computer] [Coco] Bug in FOR NEXT ?

[Robert Gault]

Rather than speculating on this, the code can be read in the Unravelled 
series. There are no tests in FOR, all testing is done in NEXT. The NEXT 
routine is at $B0F8.

Since FOR does no testing, there is at least one pass through the loop 
even if the conditions are terminal. NEXT updates the index per STEP 
direction and then compares the index to the terminal condition. This 
last is at $B121-$B126.