RAM is read and written in 64-bit chunks, and the processor just uses a bit of magic to make it look like you can address individual 8-bit bytes. For older architectures, "byte" indicated the size of the data bus, and as the original question states, a lot of …

2012年7月23日 · An 8-Bit character can only have 256 possible characters. Whereas a 16-bit can have 65,536. A 32-bit character can have 4,294,967,296 possible characters. A character set that large should be able to store every possible character in the world. Whereas a 8-bit character set can only store enough characters for the English language.

2021年12月9日 · A byte is at least large enough to contain any member of the basic execution character set and the eight-bit code units of the Unicode UTF-8 encoding form and is composed of a contiguous sequence of bits, the number of which is implementation- defined. So, it's at least 8 bits. But it could be more.

2022年3月30日 · Operating system software needs to be able to store those 36-bit addresses, and almost certainly stores that in data structures modulo 8-bits! Application software on 64-bit processors will generally use 64-bit words to store pointers, since they want to be independent of the actual memory limits imposed by the processor, board, operating ...

ASCII is a subset of UTF-8. You can read any ASCII-encoded document as UTF-8, and it will work. ASCII only uses 7 bits, and UTF-8 uses the unused eight bit to mark non-ASCII code units. The XML spec has an informal algorithm for detecting the encoding which is necessary to read the <?xml declaration, if one is present. An encoding might also be ...

2018年8月22日 · Align 8-bit data at any address [don't understand this] Align 16-bit data to be contained within an aligned four-byte word; Align 32-bit data so that its base address is a multiple of four; Align 64-bit data so that its base address is a multiple of eight; Align 80-bit data so that its base address is a multiple of sixteen

2021年8月30日 · In plain old seven bit ASCII formats, or 8 bit encodings such as the various ISO-8859-1 ("ISO Latin-1") encodings, these character codes occupy one byte each. The character string 65535 could easily require more bytes of storage in memory if the string is made up of a character code point type that is wider than a byte.

2016年6月1日 · Are the extra efforts to be able to use bit wise addressing and operations worth this? I think most Data is very suitable to be stored in multibles of 8 bits. e.g. ASCII, little values in 8,16,32,64 bits. So you gain very few by adding bit wise addressing but you get a much more compicated CPU, momory handling, caching, ... .

2021年4月23日 · Imagine that you have an 8-bit computer with 8-bit addresses, wired to a single RAM chip. Inside the chip, a multiplexer decodes the 8-bit address to one of 256 values, effectively turning on one of 256 wires. That connects a particular group of eight cells in the chip to the data bus, enabling the processor to read or write them. So far so good.

The max value for 48-bit is just slightly larger than for 32-bit, which stands to reason since a few bits are added to the end of the mantissa. (To be exact the maximum number for the 48-bit format can be expressed as a binary number that consists of 39 1's followed by 88 0's.) (The smallest is just the negative of this value.