WOW!

I had to get my calculator out and manually try your routine a couple
of times and it really works!.

it just so damm short, was it the logicaly the 1st thing you tried?
my code goes on for miles!

I will immedicaly pinch this and lower my cycles per redraw emensly.

Thanks you!

(my current routine was taking to long to draw 18 sprites)

you are my hero!


--- tyro@... wrote: > On 14 Jul 00, rednuht@...
wrote:
>
> > could some of the people who have successfully used ASM for the vmu
> > have a look at this please.
>
> First off, *FOR GOD'S SAKE* make sure that the code you post
> (*INCLUDING*
> the width added by the tabulator chars!) will not exceed 73 chars a
> line!
> It looks like SHIT when it's viewed on an 80x25 chars display! And
> you
> others, when you _quote_ source code, then please make sure that the
>
> quoted lines stay readable and aren't split over multiple lines!
> *cough*
> edit by hand if necessary *cough*
>
> Anyway, the following is a short routine that I occasionally use in
> my
> programs:
>
> FindLine:
> ;
> ; takes a line-number in ACC (0 - 31)
> ;
> ; returns line-start in ACC ($80, $86, $90, $96 etc.)
> ; and sets XBNK-register to required value (0 or 1)
> ;
> ; no other registers will be affected
> ;
> rol ; multiply with 8
> rol
> rol
> ;
> bn acc,3,.fl_l1
> sub #2 ; line start correction, if uneven line
> number
> .fl_l1:
> mov #0,xbnk ; default: bank 0
> bn acc,7,.fl_l2
> inc xbnk ; select bank 1 if line-number was 16 or
> more
> .fl_l2:
> or #%10000000 ; add $80 (start of XRAM)
> ;
> ret
>
> Hope this helps.
>
> Bye
>
>
> Alessandro
> ---
> You get what anyone gets. You get a lifetime.
>


=====
Later ...

rednuht@...
-+-..=|<[{(_"!"_)}]>|=..-+-


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