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https://frontier.innolan.net/github/AmigaExamples.git
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44 lines
994 B
C
44 lines
994 B
C
#include "hardware/custom.h"
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#include "hardware/dmabits.h"
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/*
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Scrollit:
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;; --- scroll! ---
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bltoffs =plotY*ScrBpl*3
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blth =20
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bltw =w/16
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bltskip =0 ;modulo
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brcorner=blth*ScrBpl*3-2
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movem.l d0-a6,-(sp)
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lea $dff000,a6
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bsr BlitWait
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move.l #$49f00002,BLTCON0(a6)
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move.l #$ffffffff,BLTAFWM(a6)
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move.l #Screen+bltoffs+brcorner,BLTAPTH(a6)
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move.l #Screen+bltoffs+brcorner,BLTDPTH(a6)
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move.w #bltskip,BLTAMOD(a6)
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move.w #bltskip,BLTDMOD(a6)
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move.w #blth*3*64+bltw,BLTSIZE(a6)
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movem.l (sp)+,d0-a6
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rts
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*/
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extern void blitwait(void);
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void bitblit(unsigned* src, unsigned* dest, unsigned sw, unsigned dw, unsigned dx, unsigned dy)
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{
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static struct Custom *custom = (struct Custom *)0xDFF000;
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custom->dmacon = (DMAF_SETCLR|DMAF_COPPER|DMAF_RASTER|DMAF_MASTER);
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/*
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blitwait();
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custom->bltcon0 = 0x49f00002;
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custom->bltafwm = 0xffffffff;*/
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}
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