8-bit cpu simulator in c++.

CHIP-8 Emulator

CHIP-8 emulator inspired by Austin Morlan’s CHIP-8 emulator.

A takeaway from this project:

• Always check datatypes and how much data they can store

  uint8_t only stores 8 bits, so when I did

  uint8_t x = opcode & 0x0F00u;
  x = x  >> 8u;

  x ends up only storing 0 since it can only save the first byte. Hence, the variable’s datatype should be bigger than 8 bits or do all of operation in one line like below

  uint8_t x = (opcode & 0x0F00u) >> 8u;

Usage

Required library: SDL2

Use makefile within source directory to build the emulator

cd source
make

Run the emulator

./chip8 <Scale> <Delay> <ROM>

• Scale: Multiplier for the window. Scale of 1 is 64 x 32 pixles
• Delay: Delay between each instruction. Use this to control speed of a program execution
• ROM: ROM file name. I recommend downloading from this repo