Upgrading mac68k CPUs

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://hom
epage.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

Bryan Vyhmeister wrote:
> 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?

Some SE/30s have sockets, some are soldered to the mobo.


Tim

-- 
Tim & Alethea
christtrek.org

On Thu, 7 Sep 2006, Tim & Alethea Larson wrote:

> Bryan Vyhmeister wrote:
> > 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?
>
> Some SE/30s have sockets, some are soldered to the
mobo.

If you take into account the ones with 68030 on them than
there are a lot
more (e.g LC II, LC III, II/vi, Performa 600 ...). IIRC even
the FPU
is soldered on some of the systems and not socketed.

Regards,

Johny.

On Sep 7, 2006, at 9:57 AM, Gheorghe Ardelean wrote:

> On Thu, 7 Sep 2006, Tim & Alethea Larson wrote:
>
>> Bryan Vyhmeister wrote:
>>> 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?
>>
>> Some SE/30s have sockets, some are soldered to the
mobo.
>
> If you take into account the ones with 68030 on them
than there are  
> a lot
> more (e.g LC II, LC III, II/vi, Performa 600 ...). IIRC
even the FPU
> is soldered on some of the systems and not socketed.

Interesting. I didn't know that.

Bryan