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The 68020 has many improvements over the 68000, including an instruction cache, and was the first Mac processor to support a paged memory management unit, the Motorola 68851. The Macintosh LC configured the 68020 to use a 16-bit system bus with ASICs that limited RAM to 10 MB (as opposed to the 32-bit limit of 4 GB).
Mac Mini (stylized as Mac mini) is a small form factor desktop computer developed and marketed by Apple Inc. As of 2025 [update] , it is one of the company's four current Mac desktop computers, positioned as the entry-level consumer product, below the all-in-one iMac and the professional Mac Studio and Mac Pro .
SHA-256 hash function. Smart contracts use 256- or 257-bit integers; 256-bit words for the Ethereum Virtual Machine. "We realize that a 257 bits byte is quite unusual, but for smart contracts it is ok to have at least 256 bits numbers. The leading VM for smart contracts, Ethereum VM, introduced this practice and other blockchain VMs followed." [8]
1,024 bits (128 bytes) - RAM capacity of the Atari 2600: 1,288 bits (161 bytes) – approximate maximum capacity of a standard magnetic stripe card: 2 11: 2,048 bits (256 bytes) – RAM capacity of the stock Altair 8800: 2 12: 4,096 bits (512 bytes) – typical sector size, and minimum space allocation unit on computer storage volumes, with ...
The size of a page depends on the context, and the significance of zero page memory versus higher addressed memory is highly dependent on machine architecture. For example, the Motorola 6800 and MOS Technology 6502 processor families treat the first 256 bytes of memory specially, [ 1 ] whereas many other processors do not.
In computing, octuple precision is a binary floating-point-based computer number format that occupies 32 bytes (256 bits) in computer memory. This 256-bit octuple precision is for applications requiring results in higher than quadruple precision. The range greatly exceeds what is needed to describe all known physical limitations within the ...
Also, some addressing modes that offer indirection are only possible on direct page. In the 65(c)02, the direct page is always the first 256 bytes of memory, hence “zero page”. In native mode, the 65c816 can relocate direct (zero) page anywhere in bank $00 (the first 64 KB of memory) by writing the 16-bit starting address into DP.
The need to move more than 256 bytes within main memory had historically been addressed with software [33] (MVC loops), MVCL, [34] which was introduced with the 1970 announcement of the System/370, and MVPG, patented [35] and announced by IBM in 1989, each have advantages.
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