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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]
In 8-bit CP/M versions it is located in the first 256 bytes of memory, hence its name. The equivalent structure in DOS is the Program Segment Prefix (PSP), a 256-byte (page-sized) structure, which is by default located exactly before offset 0 of the program's load segment, rather than in segment 0.
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 ...
The full 256 bytes was available on the expansion RAM. User programs could call subroutines in the monitor ROM for functions such as: serial in/out, CRLF, read keyboard, write display, time delay, convert binary to two-character hexadecimal etc. RAM 256 bytes expandable to 512 bytes with another 8155 RAM / 22 programmable IO lines.
PIC 16F1847 - Nanowatt XLP Technology variant, 8K program memory, 1024 bytes data memory, 256 bytes EEPROM, 5× timers, hardware PWM, onchip 32 MHz/31 kHz precision oscillator, 12-input 10-bit ADC, 4× PLL. 5-bit DAC. The latter two are 8-bit enhanced mid-range core with 14 additional instructions and optimizations for the C Programming Language.
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 ...
Consider a main memory of 16 kilobytes, which is organized as 4-byte blocks, and a direct-mapped cache of 256 bytes with a block size of 4 bytes. Because the main memory is 16kB, we need a minimum of 14 bits to uniquely represent a memory address. Since each cache block is of size 4 bytes, the total number of sets in the cache is 256/4, which ...