Hi Thomas!
I just ran this demo on a 20" Sony WEGA television and the flickering isn't
that bad. It would be helpful if the entire screen was filled top to
bottom, instead of just two rows of tiles. But it does look very promising,
and also has implications for games beyond Boulder Dash! I'm a huge Boulder
Dash fan (definitely in my top-ten favorites list for 8-bit games) and it
would be amazing to see it pulled off on the 2600. :)
..Al
> -----Original Message-----
> From: owner-stella@xxxxxxxxxxx [mailto:owner-stella@xxxxxxxxxxx]On
> Behalf Of Thomas Jentzsch
> Sent: Monday, December 09, 2002 1:27 PM
> To: [stella]
> Subject: [stella] My very latest trick :-)
>
>
> Hi,
> for a long time, I have been thinking about a Boulderdash for
> the 2600. There are many problems (e.g. RAM) which are hard to
> solve. And then I had no idea how to display nice graphics.
>
> Over the weekend I found some time, to make a quick hack of an
> idea, that was in my head for months now.
>
> Like in my old RESPx example, I'm showing the PF and BK color
> and use black players to produce the graphics. But this time
> I'm displaying 2*6 (flickering) players that can have different
> shapes. Each player can use one of the two colors (plus black),
> but only with the lower PF resolution (4 pixel/color).
>
> The current demo is a only a very quick hack. Due to the very
> tight timing, the final code will require to run in RAM
> (selfmodifying code!) and I also haven't checked how much time
> it would cost to modify the code for a new line with different
> graphics.
>
> Tell me how it looks on a real TV please. Too much flicker? Is
> it worth investigating more time?
>
> Here is some code snippet:
> (VDELPx = 1, COLUPx = 0, COLUPF = $20)
> ldx #$24 ; 2
> ldy #11 ; 2
> .loopLeft2:
> lda #0 ; 2
> sta COLUBK ; 3 @62 (@62..66)
> lda PF1TblL,y ; 5
> sta PF1 ; 3 @70
> lda Border ,y ; 4
> ;-----------------------------------
> sta GRP0 ; 3 @01
> lda Sand,y ; 4
> sta GRP1 ; 3 @08
> lda Diamond,y ; 4
> sta GRP0 ; 3 @15
> lda PF2TblL,y ; 4
> sta PF2 ; 3 @22
> lda Diamond,y ; 4
> SLEEP 4 ; 4
> stx COLUBK ; 3 @33 (@32..33)
> sta GRP1 ; 3 @36 (@36..40)
> lda Wall,y ; 4
> sta GRP0 ; 3
> lda Rock,y ; 4
> sta GRP1 ; 3
> sta GRP0 ; 3
> dey ; 2
> bpl .loopLeft2 ; 2³
>
> BTW: This would probaly become a Supercharger game. That's
> probably the only chance to find the necessary RAM.
>
> Have fun!
> Thomas
>
----------------------------------------------------------------------------------------------
Archives (includes files) at http://www.biglist.com/lists/stella/archives/
Unsub & more at http://www.biglist.com/lists/stella/
