Subject: Re: Upgrading mac68k CPUs
To: None <dueprocess@cogeco.ca>
From: Bryan Vyhmeister <netbsd@bsdjournal.net>
List: port-mac68k
Date: 09/06/2006 21:22:22
On Sep 6, 2006, at 5:53 PM, Due Process wrote:

> On Wed, 2006-06-09 at 14:03 -0700, John Klos wrote:
>
>> As far as speed is concerned, yes, you can put in a faster chip,  
>> but the
>> speed rating isn't really a big concern. It won't run any faster  
>> unless
>> you make changes to the motherboard.
>>
>> The 575s can be safely taken to 33 MHz:
>> http://homepage.mac.com/schrier/lc575.html
>>
>
> The LC575 was the first brand new Macintosh that I ever purchased.
> They run at 33 MHz from the factory.   The page that you link to,  
> shows
> how to slow the 575 down to 25 and 20 MHz respectively.
>
> The LC 575 ships with a 68LC040 that is clocked at 33 MHz.   Many  
> people
> swap this processor out for a full 68040, which provides the hardware
> FPU.  The processor in the LC 575 is socketed, so the swap is  
> relatively
> quick and painless.

I appreciate that clarification. I did notice that when I read  
through the page. In looking at the specs of the LC 575, I saw that  
it started out at 33 MHz. As I understand it, the only non-socketed  
68k chips are in PowerBooks. Is that correct?

Bryan