minimum-access code
minimum-access code A form of programming for early computers with magnetic-drum storage. It was also known as optimum programming. In programs for this kind of machine, each instruction specified the address of its successor, and it was desirable to place instructions in addresses so chosen that they were available under the reading heads when required. Since the execution time of instruction varied, it was necessary to work out how far the drum would rotate during execution of an instruction: this then determined the optimum position of its successor. Since this address might already be occupied, obtaining an optimal (or nearly optimal) distribution of instructions on the drum was extremely difficult.
The most widely used machine of this kind was the IBM 650; the success of the machine was largely due to the SOAP assembler, which produced near-optimal code positioning without any special effort on the part of the programmer.
The most widely used machine of this kind was the IBM 650; the success of the machine was largely due to the SOAP assembler, which produced near-optimal code positioning without any special effort on the part of the programmer.
More From encyclopedia.com
machine code , machine code In computing, instructions that the central processing unit (CPU) of a computer can execute, without the need for translation. Machine-c… subroutine , subroutine A piece of code that is obeyed “out of line”, i.e. control is transferred to the subroutine, and on its completion control reverts to the… Cache Memory , Cache memory refers to a fast storage buffer in the central processing unit (CPU) of a computer, allowing the computer to store data temporarily, mak… Fish (family) , FISH (German Geheimschreiber Cipher Machine)
█ ADRIENNE WILMOTH LERNER
As late as the World War I era, cryptology depended on highly trained people a… Risc Processor , RISC Acronym for reduced instruction set computer. A computer based on a processor or processors designed to execute a small number of simple registe… Bootstrap , bootstrap
1. In general, a means or technique for causing a system to build up from some simple preliminary instruction(s) or information. The prelim…
You Might Also Like
NEARBY TERMS
minimum-access code