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 Subject: RE: cycles per instruction table ??
Author: amiga_and_atari_fan (inktomi2-edi.server.ntl.com)
Date:   11-25-2000 20:14

Try the motorola website. There should be a programming manual for the 68k there that lists instruction timings.

Generaly though each 16 bit memory access on an st costs you four cycles if I remember correctly.

So if you were executing an instruction that writes indirectly through an address reg the timings would be like this.

move.l absolute_address,(a0)

4 cycles for the instruction opcode move.l
8 cycles to get the address from absolute_address
8 cycles to write indirectly through a0

20 cyles IIRC.

On the Falcon it's a bit faster :-)

Frank
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 Topics Author  Date
 cycles per instruction table ?? new ray-tSCc 11-24-2000 22:56 
 RE: cycles per instruction table ??  amiga_and_atari_fan 11-25-2000 20:14 
 RE: cycles per instruction table ?? new Amiga_and_atari_fan 11-25-2000 20:25 
 RE: cycles per instruction table ?? new earx 11-27-2000 10:28 

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