What is counter machine?

Counter Machine

The counter machine models go by a number of different names that may help to distinguish them by their peculiarities. In the following the instruction "JZDEC ( r )" is a compound instruction that tests to see if a register r is empty; if so then jump to instruction Iz, else if not then DECrement the contents of r:

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Some articles on counter machine:

Counter Machine Reference Model - Reference Library (RefLib) - Counter Machine Instructions
... The various Counter machine instruction sets are like "ultra-RISC instruction sets" ... And, as is the case for different RISC machine builders, even for very similar machines, different authors have used different instruction sets ... "basic instructions" are used map these differences on the relevant Counter machine variant models ...
Historical Development of The Register Machine Model - Elgot-Robinson (1964) and The Problem of The RASP Without Indirect Addressing
... A RASP or Random access stored program machine begins as a counter machine with its "program of instruction" placed in its "registers" ... Analogous to, but independent of, the finite state machine's "Instruction Register", at least one of the registers (nicknamed the "program counter" (PC)) and one or more "temporary" registers ... The finite state machine's TABLE of instructions is responsible for (i) fetching the current program instruction from the proper register, (ii) parsing the program instruction, (ii ...
Algorithm Examples - Example: Counter-machine Versus Turing-machine Computation
... more detailed than the above, because here the counter machine is specified to be a simulation in an EXCEL spread sheet ... similar, the core of the two algorithms is truly different in this example the counter machine has to increment "m" times its parameter "n" ... In the Turing machine case the machine just had to fill in the first blank it came to, then find its way "home" ...
Counter Machine - Two-counter Machines Are Turing Equivalent (with A Caveat) - The Caveat: *If* Its Counters Are Initialised To N and 0, Then A 2CM Cannot Calculate 2N
... functions of N that are not calculable by a two-counter machine — when initialised with N in one counter and 0 in the other — such as N2, sqrt(N), log2(N ... The result is not surprising, because the two-counter machine model was proved (by Minsky) to be universal only when the argument N is appropriately encoded (by Gödelization ... tarpits, the smallest-known universal Turing machines, etc.) ...
Counter Machine Reference Model
... The Counter machine's reference model is a set of choices and conventions to be used with the Counter machine and other model variants of the Register machine concept ...

Famous quotes containing the words machine and/or counter:

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    waiting in the pain machine for my bones to get hard,
    for the soft, soft bones that were laid apart
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    And the other corpse, the fractured heart,
    I feed it piecemeal, little chalice. I’m good to it.”
    —Anne Sexton (1928–1974)

    “As deaths have accumulated I have begun to think of life and death as a set of balance scales. When one is young, the scale is heavily tipped toward the living. With the first death, the first consciousness of death, the counter scale begins to fall. Death by death, the scales shift weight until what was unthinkable becomes merely a matter of gravity and the fall into death becomes an easy step.”
    —Alison Hawthorne Deming (b. 1946)