Search results
Results from the WOW.Com Content Network
In computer architecture, 256-bit integers, memory addresses, or other data units are those that are 256 bits (32 octets) wide. Also, 256-bit central processing unit (CPU) and arithmetic logic unit (ALU) architectures are those that are based on registers , address buses , or data buses of that size.
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 ...
Memory mapped TV graphics was provided in the base kit by the CDP1861 "Pixie-Graphics" chip. Pixels were large. With unexpanded 256 byte memory, the interrupt routine needed to service the chip showed on the screen. The "Full BASIC" ROM card provided an RPN calculator chip as a simple and low-cost math coprocessor. As a result, floating point ...
A memory address a is said to be n-byte aligned when a is a multiple of n (where n is a power of 2). In this context, a byte is the smallest unit of memory access, i.e. each memory address specifies a different byte. An n-byte aligned address would have a minimum of log 2 (n) least-significant zeros when expressed in binary.
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.
Historically, a byte was the number of bits used to encode a character of text in the computer, which depended on computer hardware architecture, but today it almost always means eight bits – that is, an octet. An 8-bit byte can represent 256 (2 8) distinct values, such as non-negative integers from 0 to 255, or signed integers from −128 to ...
The zero page or base page is the block of memory at the very beginning of a computer's address space; that is, the page whose starting address is zero. 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.
It featured two hexadecimal LED displays for byte data value output and a set of 8 toggle switches for input. (a hexadecimal keypad was an optional extension) The base configuration had 256 bytes of RAM, but expansion projects could raise that to a power of two-based memory store, with an upper limit of 64K address space.