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In Mac OS X 10.2, the internal codename "Jaguar" was used as a public name, and, for subsequent Mac OS X releases, big cat names were used as public names through until OS X 10.8 "Mountain Lion", and wine names were used as internal codenames through until OS X 10.10 "Syrah".
On June 6, 2022, at WWDC 2022, Apple introduced the 13-inch MacBook Pro with two Thunderbolt ports based on the Apple M2 chip. This launched alongside an updated MacBook Air, with a new design, and also with the M2 chip. The specifications of the M2 MacBook Pro are almost the same, but it supports up to 24 GB of unified memory.
Opler projected that fourth-generation computer systems would have a writable control store (a small specialized high-speed memory) into which microcode firmware would be loaded. Many software functions would be moved to microcode, and instruction sets could be customized, with different firmware loaded for different instruction sets. [3]
Without reprogrammable microcode, an expensive processor swap would be required; [36] for example, the Pentium FDIV bug became an expensive fiasco for Intel as it required a product recall because the original Pentium processor's defective microcode could not be reprogrammed. Operating systems can update main processor microcode also. [37] [38]
This offered a highly orthogonal instruction set with a wide variety of addressing modes, all implemented in microcode. This did not come without cost, according to early articles, about 20% of the chip's surface area (and thus cost) is the microcode system [18] and [citation needed] of the systems 68,000 transistors were part of the microcode ...
Battery life was also extended further in this update, to an estimated 10 hours for the 13-inch and 8–9 hours on the 15- and 17-inch MacBook Pro computers. [41] This was achieved through both greater power efficiency and adding more battery capacity. [ 41 ]
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In the mid-1990s, a facility for supplying new microcode was initially referred to as the Pentium Pro BIOS Update Feature. [18] [19] It was intended that user-mode applications should make a BIOS interrupt call to supply a new "BIOS Update Data Block", which the BIOS would partially validate and save to nonvolatile BIOS memory; this could be supplied to the installed processors on next boot.