MDD Cache speed

[indibil]

Hi, I've been trying to view the cache speed on my 2x1.42GHz MDD with OS9 and Gauge Pro, but it doesn't show any information about either L2 or L3. I can't find any app that gives me this information.

Is there a version of Gauge Pro for OSX? Or what app could show me the L3 cache speed, or at least the ratio?

I've been told it's in a register called L3CR, but I don't know how to access this register.

Thanks.

 

[joevt]

Try PowerLogix CPU Director? There's a Mac OS 9 version and versions for some earlier versions of Mac OS X.

Performance Tools/CHUD/Hardware Tools has a program called "Reggie SE.app" which lets you view registers.

 

[MBongo]

Might try https://macintoshgarden.org/apps/machspeed-control-combo too.

 

[indibil]

Try PowerLogix CPU Director? There's a Mac OS 9 version and versions for some earlier versions of Mac OS X.

Performance Tools/CHUD/Hardware Tools has a program called "Reggie SE.app" which lets you view registers.

Might try https://macintoshgarden.org/apps/machspeed-control-combo too.

Perfect, thank you very much, I'll try these options.

 

[indibil]

Thanks for your help. I finally found a version of CPU Director that showed this information in the MDD under OS9, and it wasn't the latest version.

I verified that the cache ratio was 6:1, and the cache chips support up to 300MHz, so I decided to change the ratio to 5:1 by modifying the EEPROM. I've summarized it here:

https://rosysumenteinquieta.blogspot.com/2025/07/acelerar-la-cache-en-un-g4-mdd-dual.html





I hope with this information we can change the cache ratios as we wish.

 

[joevt]

I finally found a version of CPU Director that showed this information in the MDD under OS9, and it wasn't the latest version.

Do you mean the latest version doesn't run in Mac OS 9 (i.e. it's for Mac OS X) or that the latest version that runs in Mac OS 9 did not show the information? What are the versions that didn't work and the versions that did?

 

[indibil]

Do you mean the latest version doesn't run in Mac OS 9 (i.e. it's for Mac OS X) or that the latest version that runs in Mac OS 9 did not show the information? What are the versions that didn't work and the versions that did?

Under OS9 only the CPU_Director_1.5f5 version worked for me, the others gave me an error when opening the application.