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Mac OS X Tiger through Mac OS X Snow Leopard support PAE and the NX bit on IA-32 processors; Snow Leopard was the last version to support IA-32 processors. On x86-64 processors, all versions of macOS use 4-level paging (IA-32e paging rather than PAE) to address memory above 4GB. Mac Pro and Xserve systems can use up to 64 GB of RAM. [23]
One-bit SD bus mode: Separate command and data channels and a proprietary transfer format. Four-bit SD bus mode: Uses extra pins plus some reassigned pins. This is the same protocol as the one-bit SD bus mode which uses one command and four data lines for faster data transfer. All SD cards support this mode.
Sign extension (sometimes abbreviated as sext, particularly in mnemonics) is the operation, in computer arithmetic, of increasing the number of bits of a binary number while preserving the number's sign (positive/negative) and value. This is done by appending digits to the most significant side of the number, following a procedure dependent on ...
Mach-O binary (64-bit) FE ED FE ED: þíþí: 0 JKS Javakey Store [31] CE FA ED FE: Îúíþ: 0 Mach-O binary (reverse byte ordering scheme, 32-bit) [32] CF FA ED FE: Ïúíþ: 0 Mach-O binary (reverse byte ordering scheme, 64-bit) [32] 25 21 50 53 %!PS: 0 ps PostScript document: 25 21 50 53 2D 41 64 6F 62 65 2D 33 2E 30 20 45 50 53 46 2D 33 2E ...
32 Sequence Number: 8 64 Acknowledgement Number (meaningful when ACK bit set) 12 96 Data Offset: Reserved: CWR: ECE: URG: ACK: PSH: RST: SYN: FIN: Window: 16 128 Checksum: Urgent Pointer (meaningful when URG bit set) [18] 20 160 [Options] If present, Data Offset will be greater than 5. Padded with zeroes to a multiple of 32 bits, since Data ...
Released in 2011, the ARMv8-A architecture added support for a 64-bit address space and 64-bit arithmetic with its new 32-bit fixed-length instruction set. [13] Arm Ltd. has also released a series of additional instruction sets for different rules; the "Thumb" extension adds both 32- and 16-bit instructions for improved code density , while ...