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- Newsgroups: comp.sys.amiga.hardware
- Path: ppp39.express.ca!user
- From: dsieber@express.ca (Dirk Sieber)
- Subject: Re: 68010 in 500
- Message-ID: <dsieber-1201961228580001@ppp39.express.ca>
- Date: Fri, 12 Jan 1996 12:28:58 -0800
- References: <AD10AC4A966823E9@fc-16.ppp.frii.com> <960109045011cfgtkbcamb@spike.zooted.commo.mcnet.de> <4d5bfc$ov8@cloner3.netcom.com>
- Organization: Wildstar Consulting
- X-Newsreader: Yet Another NewsWatcher 2.1.2
-
- In article <4d5bfc$ov8@cloner3.netcom.com>, tpwalton@ix.netcom.com(Andrew
- A. Bosler ) wrote:
-
- > In <960109045011cfgtkbcamb@spike.zooted.commo.mcnet.de>
- > Spike@zooted.commo.mcnet.de (Todd Garoutte) writes:
- > >
- > >Reply Mail from goaway@frii.com dated 03-01 21:57
- > >subject '68010 in 500'
- > >
- > >> I read somewhere that people were installing 68010's into A500's.
- > The post
- > >> said they are pin for pin compatable. The A500 was just turned on
- > and it
- > >> worked fine, only much faster.
- > >
- > >yes you can do this...it is compatable....I did it to my olsd 500 but
- > as for
- > >the speed increase.......its really not much to notice....
- > >
- > >Todd
- > >
- > The reason you won't see a speed increase is that, although the 68010
- > is compatible with the 68000, the system clock speed is still the same.
- > In order to experience speed increases with a higher speed CPU, the
- > system clock (there are some other considerations as well) must be
- > increased also. For example: you can place a 68000-16Mhz in a 500 and
- > it will basically run at the old 8Mhz rate. Using a higher speed CPU
- > replacement might have the advantage of staying cooler, but without
- > further modification, no speed increase should be seen.
- >
- > Ted.
- > tpwalton@ix.netcom.com
-
- Well, actually, you *will* see a speed increase, even at the same clock
- speed. A large part of the speedup when changing generations of chips
- (ie. from an '030 to an '040) isn't the clock speed... it's the fact that
- the chip executes the instructions faster. For example, compare a 25 Mhz
- '030 to a 25 Mhz '030 (A3000 to an A4000)... the '040 is definitely
- faster, but the clock speeds are the same. Mind you, the speed difference
- from an '000 to a '010 isn't amazing... between 5 & 10%, if I remember
- correctly.
-
- However, if you're talking about chips of the same generation (like your
- example of a 16 Mhz 68000 placed in an 8Mhz system), you're absolutely
- correct.
-
- One last thing to be aware of... in the move from the 68000 to the 68010,
- Motorola changed one of the instructions from a normal instruction to a
- priveledged instruction. If you suddenly start getting a priviledge error
- guru when running certain programs, you might want to look on Aminet for
- one of the patches that fixes this problem.
-
- Dirk
-
- --
- Dirk Sieber dsieber@express.ca dsieber@unixg.ubc.ca
- Wildstar Consulting
-
-