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Atari demoscene BBS
| Re: DSP cycles |
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Posted by: Sallafranque
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Feb,25.2010-14:14
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Ok, I understand.
would you please just give me your advise on these few case ?
The trace is "Pc: (cycles) instruction"
Here, PC is at address > $200, and I use both x: and y: memories.
0301: (03 cyc) mpy x0,x0,a b,x:(r2)+n2 y:(r5)-,b
0306: (02 cyc) mpy x0,x0,a b,x:(r3)+ y:(r6)-,a
What if these instructions were in internal P memory (p<$200) ?
What if I access to external memory for P and only to 1 external memory for X or Y ?
0301: (?? cyc) mpy x0,x0,a y:(r5)-,b
0306: (?? cyc) mpy x0,x0,a b,x:(r3)+
Last question : what are the extra cycles for external memories access (P:, X:, Y:) ?
(I used +1 in Hatari)
Many thanks for your help,
Regards
Laurent
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Topic
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Posted by
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Date
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DSP cycles
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Sallafranque
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Feb,23.2010-00:56
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Re: DSP cycles
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mikro
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Feb,23.2010-12:40
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Re: DSP cycles
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Sallafranque
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Feb,24.2010-02:49
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Re: DSP cycles
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Sallafranque
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Feb,24.2010-02:49
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Re: DSP cycles
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mikro
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Feb,24.2010-11:50
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Re: DSP cycles
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Sallafranque
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Feb,24.2010-13:43
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Re: DSP cycles
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Chuck/Dune
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Feb,24.2010-13:56
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Re: DSP cycles
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Sallafranque
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Feb,24.2010-14:06
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Re: DSP cycles
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mikro
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Feb,25.2010-00:54
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Re: DSP cycles
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Sallafranque
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Feb,25.2010-14:14
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Re: DSP cycles
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mikro
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Feb,25.2010-18:10
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Re: DSP cycles
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Patrice Mandin
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Feb,25.2010-19:38
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Re: DSP cycles
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Sallafranque
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Feb,27.2010-11:13
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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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