On Mon, 10 May 2004, [iso-8859-1] Christian Bogey wrote:
> I noticed the latest demos I wrote generated only 261
> scanlines instead of 262...the only thing I changed
> was the use of TIM64T (instead of looping 37 WSYNC)
> for the Vertical Blank, so I made some tests and I
> located the source of the problem :
At first glance I don't see anything wrong with it.
<TOTAL PARANOIA> Maybe your version of z26 isn't counting lines right?
</PARANOIA>
Trying inserting the following lines into your code before the frame loop:
Setup_Playfield
LDA #$ff
STA PF0
LDA #$04
STA COLUPF
Start_Frame
...
Assuming z26 can sync on a 40 line display (I think it can), you should
be able to count the number of active scanlines by hand. You might want
to make sure you're using the "wide-spaced scanline" video mode to make
counting easier...I think it's mode 6?
-Chris
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