picnoob wrote:

> srry to bother u ppl again with wot is probably a trivial question, but im
> not sure i quite understand the decfsz function.

It's not advisable to use "chat slang", it may get you in trouble here. :)

> here is a delay routine i found on the www, that counts to 255, 255 times:
>
> (count1 and count2 both contain the value 255)
>
> Delay
> Loop1          decfsz               COUNT1,1 ;reduces COUNT1 by 1
>                     goto                  Loop1 ;if COUNT1 isnt 0, reduce
> it again(im understandin so far)
>                     decfsz             COUNT2,1 ;reduce COUNT2 by 1
>                     goto                 Loop1 ;HUH, WHA?? why are we 
> going
> back to loop1, and how has COUNT1 magically                    ;been 
> brought
> back to its initial value?
> return
>
> why does the count1 variable not remain 0 once it has been decfsz-ed to 0?
> and what does the ",1" do at the end of the decfsz?
>
> this is quite confusing.

If COUNT1 is zero (0x00), and you subtract 1 from it, it becomes 255 (0xFF). 
Think of the tape recorder counter: which number comes after 000 if you go 
backwards?

Vitaliy 

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