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Atari coding BBS
| Re: read/write cycles on 68000 |
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Posted by: earx
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May,12.2006-12:13
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easy, isn't it.. :) compare to 030 and up or dsp ;)
add.w d0,d0 ; 4 cycles
move.w d0,(a0) ; 8 cycles
move.w (a0),d0 ; 8 cycles
move.l d0,(a0) ; 12 cycles
move.l (a0),d0 ; 12 cycles
move.l (a0),(a1) ; 20 cycles
recently i noticed that add.l dn,dm is 6 cycles (!). and if this is "unpaired" this means it's actually 8 cycles, blah ;)
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