LMC
Little man computer is a simulator that allows you to write and run assembly code. It is a simple computer architecture that is used to teach the basics of computer science.
Taking the table from assembly instructions we can see how the instructions are used in the LMC. LMC will use a number to represent the instruction instead of the mnemonic code. For example, ADD will be represented as 1 and SUB will be represented as 2.
| Instruction (Mnemonic code) | Explanation | Little man computer code number |
|---|---|---|
ADD | Add the current item in the accumulator with the address defined | 1XX |
SUB | Subtract the current item in the accumulator with ther address defined | 2XX |
STA | Store the current item in the accumulator into memory | 3XX |
LDA | Load from memory | 5XX |
BRA | Branch always | 6XX |
BRZ | Branch if the accumulator is zero | 7XX |
BRP | Branch if the accumulator is positive | 8XX |
INP | Take in a input and store into the accumilator | 901 |
OUT | Print out the current state of the accumulator | 902 |
HLT | End the program | 0 |
DAT | Data location |