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From: ken@hpclkms.HP.COM (Kenneth Sumrall)
Newsgroups: comp.sys.m68k
Subject: Re: 68000 68010
Message-ID: <300001@hpclkms.HP.COM>
Date: 12 Sep 88 22:48:56 GMT
Article-I.D.: hpclkms.300001
References: <8968@cup.portal.com>
Organization: HP NSG/ISD California Language Lab
Lines: 28

/ hpclkms:comp.sys.m68k / Ian_Matthew_Smith@cup.portal.com / 11:52 pm  Sep 10, 1988 /

>   I have an Amiga computer with a 68000.  What I was wondering was what
>exactly are the diffrences between the 68000 and 68010?  I know that the
>010 dosen't have one instruction but I have a program to correct this. Would
>there be any real speedup in heavy number crunching?  Like ray-tracing or
>sound wave mixing?  Dosen't the 010 have better written math routines?
>   Thanks in advance for any information.
>
>Ian_Matthew_Smith@cup.portal

The 68010 isn't missing any instructions that the 68000 has, but their is
one instruction that used to be a user mode instruction that now is a super-
visor mode instruction.  The speedup that the 68010 would gives has been 
quoted as about 5%.  This is accomplished through a mode called
looping mode (or something similiar) in which small tight loops are held
entirely in a small on chip chache, and can be executed without loading 
opcodes from external memory.  This mode is most useful in operations
like memory block moves and such.

As for math routines, floating point math for the 68010 is done is software
or with a co-processor.  So I don't expect a 68010 would speed up math 
operations much.

Hope this information helps.

Kenneth Sumrall
ken%hpclkms@hplabs.hp.com
ken%hpclove@hplabs.hp.com