This is a CHIP8 Compiler developed using JavaScript. It allows you to write code, compile, and see it in the emulator afterwards.
Click the Compile button to compile the code. Click Start or Step to run your code in the emulator. You can click Stop to stop the emulator, and you can click Reset to reset it. Clicking the Save button on the left will allow you to download the compiled binary file.
Insturction names and descriptions are taked from Cowgod's Chip-8 Technical Reference v1.0.
| Opcode | Instruction | Description |
|---|---|---|
| 0nnn | SYS addr | Jump to a machine code routine at nnn. |
| 00E0 | CLS | Clear the display. |
| 00EE | RET | Return from a subroutine. |
| 1nnn | JP addr | Jump to location nnn. |
| 2nnn | CALL addr | Call subroutine at nnn. |
| 3xkk | SE Vx, byte | Skip next instruction if Vx = kk. |
| 4xkk | SNE Vx, byte | Skip next instruction if Vx != kk. |
| 5xy0 | SE Vx, Vy | Skip next instruction if Vx = Vy. |
| 6xkk | LD Vx, byte | Set Vx = kk. |
| 7xkk | ADD Vx, byte | Set Vx = Vx + kk. |
| 8xy0 | LD Vx, Vy | Set Vx = Vy. |
| 8xy1 | OR Vx, Vy | Set Vx = Vx OR Vy. |
| 8xy2 | AND Vx, Vy | Set Vx = Vx AND Vy. |
| 8xy3 | XOR Vx, Vy | Set Vx = Vx XOR Vy. |
| 8xy4 | ADD Vx, Vy | Set Vx = Vx + Vy, set VF = carry. |
| 8xy5 | SUB Vx, Vy | Set Vx = Vx - Vy, set VF = NOT borrow. |
| 8xy6 | SHR Vx Vy | Set Vx = Vx SHR 1. |
| 8xy7 | SUBN Vx, Vy | Set Vx = Vy - Vx, set VF = NOT borrow. |
| 8xyE | SHL Vx Vy | Set Vx = Vx SHL 1. |
| 9xy0 | SNE Vx, Vy | Skip next instruction if Vx != Vy. |
| Annn | LD I, addr | Set I = nnn. |
| Bnnn | JP V0, addr | Jump to location nnn + V0. |
| Cxkk | RND Vx, byte | Set Vx = random byte AND kk. |
| Dxyn | DRW Vx, Vy, nibble | Display n-byte sprite starting at memory location I at (Vx, Vy), set VF = collision. |
| Ex9E | SKP Vx | Skip next instruction if key with the value of Vx is pressed. |
| ExA1 | SKNP Vx | Skip next instruction if key with the value of Vx is not pressed. |
| Fx07 | LD Vx, DT | Set Vx = delay timer value. |
| Fx0A | LD Vx, K | Wait for a key press, store the value of the key in Vx. |
| Fx15 | LD DT, Vx | Set delay timer = Vx. |
| Fx18 | LD ST, Vx | Set sound timer = Vx. |
| Fx1E | ADD I, Vx | Set I = I + Vx. |
| Fx29 | LD F, Vx | Set I = location of sprite for digit Vx. |
| Fx33 | LD B, Vx | Store BCD representation of Vx in memory locations I, I+1, and I+2. |
| Fx55 | LD I, Vx | Store registers V0 through Vx in memory starting at location I. |
| Fx65 | LD Vx, I | Read registers V0 through Vx from memory starting at location I. |
The source code is provided under MIT License.