Subject: Re: [stella] Math riddle : Loading TIM64T with 43 burns only 36scanlines (not 37) From: Chris Wilkson <ecwilkso@xxxxxxx> Date: Mon, 10 May 2004 10:01:59 -0400 (EDT) |
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 ---------------------------------------------------------------------------------------------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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