Cache Switch control panel

The Cache Switch control panel was provided by Apple Computer to allow users of the Macintosh Quadra series to switch off the cache of their Motorola 68040 processors in case of software incompatibility. Only one version (7.0.1) was included with System 7.0.1 to Mac OS 8.1.

History
The of the 68040 processors contributed to their dramatic performance improvements, but was also known to break some older hard-coded software. This could be turned off with the Cache Switch for the sake of backward compatibility, but at the expense of a 3-fold penalty in performance. This control panel would also work on 3rd-party processor upgrades.