The United States government banned export of PowerPC G4-based computers to over 50 countries due to its status as a supercomputer. There are discredited rumors that Apple used a 7458 (which doesn't exist) in some of the last PowerBook G4 models. Only used in third-party accelerator boards.
#Old mac powerpc software code
#Old mac powerpc software update
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PowerPC 7441 - code named "Goldfish", a minor "errata" update with nearly identical specs as the 7440.Used in Power Mac G4 models between 667 to 800 MHz. PowerPC 7450 - operated at 2.5V with 256 KB onboard L2 cache and also supported an external 元 cache.Used in Titanium PowerBook G4 models with gigabit ethernet. PowerPC 7440 - code named "V'ger" and sometimes called "G4 Plus", operated at 1.5V and contained 256 KB onboard L2 cache, but did not contain 元 cache support.Pin compatible with latter PowerPC G3 processors, making possible upgrades of PowerBook G3 "Pismo" models. PowerPC 7410 - code named "Nitro", a low power version with support for up to 1 MB L2 cache, used in the first Titanium PowerBook G4 models between 400 to 500 MHz.PowerPC 7400 - code named "Max", supports up to 2 MB L2 cache and used in the first "graphite" Power Mac G4 models between 350 to 500 MHz.Though the IBM and Motorola versions use compatible instruction sets, the hardware logic implementations are very different from one another.
![old mac powerpc software old mac powerpc software](https://miro.medium.com/max/1072/1*uu0KPFOIF2FmPYzb2XO5fA.jpeg)
They were touted by Apple for containing a " Velocity Engine", a 128-bit vector processing unit marketed as AltiVec by Motorola, and Vector Multimedia Extension (VMX) by IBM.
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G4 processors contained a 32 KB instruction cache, a 32 KB data cache, and varying levels of support for L2 and/or 元 caches.