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How it works

Basics

Instructions are always in pairs.

One on the left being set, working as input from the bus. And one on the right working as output to the bus

Imagine it like the = operator in other languages. Except that the = operator is not written here.

Possible Input instructions

Possible Output instructions

Abstracting Instructions

How to

Set one register to another register

Write the mnemonic for the register you want to write to from the input instructions
Write the mnemonic for the register you want to copy from from the output instructions

Set one register to an immediate value

Write the mnemonic for the register you want to write to from the input instructions
Write "NUM" then write the desired byte in hex following

Declaring a variable

Write "VAR" then write the desired name of your variable

Store a value from a register into RAM

Write "LOAD" then write the name of the previously declared variable
Start a new line
Write "RAM"
Write the mnemonic for the register you want to copy from from the output instructions

Store an immediate value into RAM

This is not possible without using a register!

Set a register to the desired immediate value
store the value from the register in ram

CR RISC Processor Compiler