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From: dillon@CORY.BERKELEY.EDU (Matt Dillon)
Newsgroups: net.micro.68k
Subject: Re: 68000 CPU clock cycles
Message-ID: <8603222045.AA03534@cory>
Date: Sat, 22-Mar-86 15:45:50 EST
Article-I.D.: cory.8603222045.AA03534
Posted: Sat Mar 22 15:45:50 1986
Date-Received: Tue, 25-Mar-86 03:13:34 EST
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>Does anyone out there on the net have any information on the number of
>CPU cycles each instruction of the 68000 uses? I have the the books
>"68000 Assembly Language Programming" by Gerry Kane, Doug Hawkins, and
>Lance Leventhal; and "68000 Microprocessor Handbook" by Gerry Kane. Each
>book contains in Appendix B a table listing the CPU cycles.  The following are
>typical entries in the "Clock Cycles" column:

>		MOVE.L	data32,Dn	12(3/0)
>		BCS	label		10,18(1/0)

	I suggest that you buy Motorola's 68000 handbook. 

	The number's in parenthesis refer to the number of read/write cycles
for the instruction  X(r/w), where X is the number of clock cycles it takes
to execute the instruction.  Additionaly, when you have  X,Y(r/w),  the X
refers to the number of clock cycles if the branch is not taken, the Y to
the number of cycles if it is taken.

					-Matt