holtzerf / lowlevelemulation Goto Github PK

Repository just for practice

• everything still work in progress
• instruction set designed by Gary Explains https://www.youtube.com/channel/UCRjSO-juFtngAeJGJRMdIZw

cpu:

• little endian memory
• instruction size 4 bytes
• instruction pointer (ip) contains instruction address relativ to memory for the next instruction
• program have to be terminated with halt instruction
• seven status registers to control program flow
• register width is two byte
• opcodes always work on registers

assembler:

• lasm: a basic two pass assembler for the instruction set
• simply converts the .asm to a binary programm which can be load and executed by the cpu

assembly

• look at InstructionSet.png to see the available instructions
• instuctions always operate on registers
• assembler supports simple labels/branches like .NAME which can be used by the branch operations
• and a simple comments starting with #
• number can be decimal 3213 or hexadecimal 0x...

test:

• test.asm is a simple assembler programm written for the cpu and can be translated with lasm