Software-only OVERCLOCK for LC475, LC575, Quadra 605

[phipli]

Shhh!

He didn't mean that folks. Just a late April fools joke.

Its also the wrong PSU - it is the older, lower power LC / LC II style PSU, an ASTEC in fact

My LC 475 is an official body snatcher - someone bought the logic board upgrade kit with the sticker for the front case. Means the case has an LC II era serial number and the groove on the front of the case.

Don't worry though, I'm only overloading the PSU with a 53MHz OC, 7200 rpm 9GB disk and an ethernet card.

 

[jasa1063]

I have a Color Classic Mystic (LC 575 logic board). When I try to use the Soft-475-Overclock extension I get a red X on the extension during startup. Getting it on System 7.1, 7.5.5 and 8.1. I am using the v0.52 package. The documentation indicates that this is due to it not being supported on that logic board. Anyone else having this issue or know what might be the cause of this?

 

[Nitram78]

I have a Color Classic Mystic (LC 575 logic board). When I try to use the Soft-475-Overclock extension I get a red X on the extension during startup. Getting it on System 7.1, 7.5.5 and 8.1. I am using the v0.52 package. The documentation indicates that this is due to it not being supported on that logic board. Anyone else having this issue or know what might be the cause of this?

I'm having exactly the same problem with my Mystic. For now, I tested Systems 7.5.5, 7.6.1 ('gusd' ressource patched from 21 to 10 for Gestal ID 99) and 8.1.

 

[Nitram78]

I'm having exactly the same problem with my Mystic. For now, I tested Systems 7.5.5, 7.6.1 ('gusd' ressource patched from 21 to 10 for Gestal ID 99) and 8.1.

@jasa1063 , have you done the VGA mod on your Mystic ? I didn't, and I suspect people who recently tried software overclocking already had the VGA mod done.
With the aforementioned modification to the System file, the Gestalt ID returned by my machine is ‘99’, which corresponds to the LC 580. The Soft475 extension doesn't accept this, quite logically.
However, it is possible to work around the issue using Wish-I-Were, thus forcing the Gestalt ID to 92 (=LC 575) and only use Phipli's Control Strip, which modifies the CPU speed as expected this time.