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Raistlin
Registered: Mar 2007
Posts: 552 |
Event id #3003 : Only Sprites Compo
Competition Rules:
* You can ONLY display sprites - no chars or bitmaps. Magic byte(s) CAN be used.
* Change any VIC properties that you like
* The Effect must be a one-screener in one PRG (preferably compressed) (no disk streaming)
* Variations of the effect are allowed
* Interaction is allowed - make it a game if you like ;-p
* Music is allowed and encouraged
* Borders can of course be removed
Winner will be chosen based on CSDB's rankings. |
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MagerValp
Registered: Dec 2001
Posts: 1055 |
My plan was for a “no badlines” compo, but I guess this is effectively the same thing 😀 |
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Krill
Registered: Apr 2002
Posts: 2839 |
Quoting MagerValpMy plan was for a “no badlines” compo, but I guess this is effectively the same thing 😀 Well...
Quote:no chars or bitmaps. Not quite. Using "linecrunching", you can display char/bitmap data without any badline during the entire frame, repeating the linebuffer content while omitting any DMA to update it. =) |
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TheRyk
Registered: Mar 2009
Posts: 2062 |
Hehe, so much time before the compo has even started to whine about rules, you are doomed ;) |
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MagerValp
Registered: Dec 2001
Posts: 1055 |
Quoting KrillUsing "linecrunching", you can display char/bitmap data without any badline during the entire frame, repeating the linebuffer content while omitting any DMA to update it. =)
Don't you need one badline at the top to kick it off? Or does the internal vic buffer retain what was there previously? But yeah creative cheating like that is what you'd hope for in a compo. |
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Oswald
Registered: Apr 2002
Posts: 5017 |
you can infinitely supress badlines, and the last one red is displayed from the internal VICII buffer forever. VICII stores internally 40x4bit d800 color info and 40x8 bits of char data. |
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Krill
Registered: Apr 2002
Posts: 2839 |
Quoting KrillUsing "linecrunching", you can display char/bitmap data without any badline during the entire frame, repeating the linebuffer content while omitting any DMA to update it. =) Quoting MagerValpDon't you need one badline at the top to kick it off? Or does the internal vic buffer retain what was there previously? But yeah creative cheating like that is what you'd hope for in a compo. The buffer content is kept across video frames, so can do complete video frames with char/bitmap content entirely without badlines.
It's not creative cheating for a "no badlines" compo, imho, but it would be outlawed in a "sprites and idle byte only" compo. =) |
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MagerValp
Registered: Dec 2001
Posts: 1055 |
Neat, then yes, we get the first arcane rule "clarification" for my fictional nonexistent no badlines compo, that you're allowed to set the internal 40x12 buffer once on startup :) |
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Oswald
Registered: Apr 2002
Posts: 5017 |
Quote: Neat, then yes, we get the first arcane rule "clarification" for my fictional nonexistent no badlines compo, that you're allowed to set the internal 40x12 buffer once on startup :)
provide a code frame to set up the screen too :) |
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ChristopherJam
Registered: Aug 2004
Posts: 1378 |
Oswald:
jsr wframe
lda#$70
sta $d011
... (fill $7c0..$7c0+39 and dbc0 to $dbc0+39 here)
jsr wframe
; now fill screen with linecrunch
...
wframe:
bit $d012
bpl *-3
bit $d012
bmi *-3
rts
Done :) |
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Oswald
Registered: Apr 2002
Posts: 5017 |
cool ! I can do similar:
* = startcode
;put cool fx here
;end |
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