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Atari coding BBS
| Re: Overscan+rasters |
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Posted by: leonard
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May,02.2017-14:29
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Does the MPP picture format by sector one already handle all these stuff? ( many colors + fullscreen )
If you are STE specific you could even use blitter to change colors. I guess MPP already support that.
SID voice is more tricky. I use it in one fullscreen in the 20th birthday reset demo. I use a 15Khz replay (one sample per scanline), using a 16bit fractional int to handle the SID phase. the code looks like:
add.w a0,d0 ;sid phase inc
bcc.s .skip
swap d0
.skip: move.b d0,(a1) ; a1 is YM register, and d0 contains 0 and SID volume level
the trick is that the routine takes exactly the same time, whatever the BCC branch or not, because of the SWAP dn" taking 4 cycles
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Topic
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Posted by
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Date
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Overscan+rasters
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mic/dune
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May,02.2017-12:38
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Re: Overscan+rasters
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leonard
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May,02.2017-14:29
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Re: Overscan+rasters
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mic/dune
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May,02.2017-23:39
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Re: Overscan+rasters
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ggn
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May,03.2017-08:20
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Re: Overscan+rasters
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dml
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May,03.2017-12:22
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Re: Overscan+rasters
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Troed
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May,26.2017-07:48
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Re: Overscan+rasters
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mic/dune
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May,03.2017-18:25
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Re: Overscan+rasters
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leonard
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May,03.2017-22:49
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Re: Overscan+rasters
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mic/dune
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May,04.2017-07:44
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Re: Overscan+rasters
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evil
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May,05.2017-20:26
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Re: Overscan+rasters
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mic/dune
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May,05.2017-22:54
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What's the anti-troll code?
That's your personal code to be able to add comments and messages on the dhs.nu site.
Don't have a code or forgot it? Fix it here.
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