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Conrad
Registered: Nov 2006
Posts: 849 |
Working with bad lines
hi.
Could someone help me with how to detect the bad lines properly and how to avoid them for raster based routines such as side borders. Would adjusting $d011 at each bad line be the best way? |
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Codey
Registered: Oct 2005
Posts: 79 |
Quote: HCL is right, you have to have the last 4 ($f0) sprites switched on for sideborder WITHOUT FLD (so you can make those nice sideborder DYCPs/pics/plasmas etc) and for side border with FLD (the 1001 crew way :) you have to have all 8 sprites switched on for it to work. I've never seen a demo with sideborder using SIX sprites before.
when i first saw escos i was absolutely baffled. i never knew they used fld to make the timing so simple. makes sense now. |
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MagerValp
Registered: Dec 2001
Posts: 1078 |
Escos uses the escos trick, not FLD. With a little $d011 twiddling, you get open top/bottom borders, open screen, but no badlines (and no char/bitmap gfx) and sprites visible. All you need then is $d016 on every line for the sideborder, and a simple plex.
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JackAsser
Registered: Jun 2002
Posts: 2014 |
Yes, escos simply open the top/bottom border and at the same time disable the display => all the screen becomes top/bottom border which you open, so you get classic $3fff everywhere + sprites visible. There is a thread about this aswell FYI. |
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Conrad
Registered: Nov 2006
Posts: 849 |
Ah... NOW I see how it works... I just didn't know what ESCOS actually was until now! It's pretty obvious! Oh how ashamed I am with what I discussed!! =(
Anyway, I've managed to work out how side border routines work now, so thanks very much for your advices! :) |
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Copyfault
Registered: Dec 2001
Posts: 478 |
@JA: it's the thread about a "screen with no badline"; ninja already pointed to it here in this thread.
@HCL: hmm, counting cycles gives me four and a half sprites ;p
CF |
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Oswald
Registered: Apr 2002
Posts: 5094 |
copy, including the cycles needed for the code ? |
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Graham
Account closed
Registered: Dec 2002
Posts: 990 |
@Danzig: Nopes, you can not use any sprites. Sprites 2,3,5,7 for example will not allow open sideborder on badlines. |
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Danzig
Registered: Jun 2002
Posts: 440 |
@graham: i ment "in a row" but since if haven't ever tested it all maybe i'm wrong. just can remember using 1-4 and 4-7 but it's all sooo long ago |
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MRT
Account closed
Registered: Sep 2005
Posts: 149 |
Blocking thos badlines is oldschool stuf ;-)
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Oswald
Registered: Apr 2002
Posts: 5094 |
LOL :D |
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