"An individual machine code is called a machine instruction." What does "individual machine" code mean, what does that do? Please don't give me links, I came on a forum for answers, I can find my own links. Thanks!

Each machine type is designed with a specific set of instructions.

In this case "an individual machine instruction" is simply one instruction that the computer can understand. It could be, for example, to add a number to another, or move a value from one place in the memory to another.

A mock turtle is what mock turtle soup is made of.

http://en.wikipedia.org/wiki/Alice%27s_Adventures_in_Wonderland

 

And hardware abstraction is what layers are made of.

"An individual machine code is called a machine instruction." What does "individual machine" code mean, what does that do? Please don't give me links, I came on a forum for answers, I can find my own links. Thanks!

 

... and so, a machine instruction might be to "branch always" to a specified address (that is, continue executing code at the address given after the instruction). Other instructions (shown here in assembly language) may include BRN (branch if accumulator is negative), INC (increment accumulator, ie A=A+1), DEC (decrement accumulator, ie A=A–1), STO (store accumulator, ie in the address that follows), STP (stop, ie stop program execution), etc.

 

The "branch always" instruction is the only machine code I remember from programming in machine code many years ago. For this computer, its "branch always" instruction was 5717₈ in machine code (and BRA in its assembly language). It was a 24-bit octal machine, where each octal digit was represented by three bits, of course, and 5717₈ meant "branch always". It would appear as the first half of the machine's 24-bit byte/word, and the address to branch to was contained in the second half of the byte/word.

 

Wikipedia's article on machine code says that programming in machine code is tedious, and it certainly is. Not only that, but we programmed the computer using a bank of 24 toggle switches, one for each bit in the byte/word, and another bank of 24 toggle switches to designate the address where to store each byte/word. So, we would input 5717₈ as 101,111,001,111₂ (a "1" was toggle switch up, and a "0" was toggle switch down) followed by the 12-bit address to branch to, also in binary. Tedious indeed.

Edited May 9, 201312 yr by ewmon

The "machine code" is dependent on the CPU's architecture, ARM..MIPS..etc, there are 2 main assemblers used which are IBM and intel i *think*, its been a while and what it does is reference to a library of binary commands... i.e hardwired commands, PUSH, POP, MOVE.......

Edited May 10, 201312 yr by DevilSolution