README.md

4is 256 by Jan Kadlec

1. Links

• Back to overview
• How to play
• Archived files
• Source code

2. Summary

• Programming language: Assembly
• Main size: 256 B
• Extra size: 0 B
• Total size: 256 B
• Feature count: 16
• Bytes per feature: 16 B

3. Controls

3.1. Pause screen

• F16: pause
• ⇧ Left Shift: move left
• ⇧ Right Shift: move right
• Ctrl: rotate counterclockwise
• Alt: soft drop

3.2. Pause screen

• Any Key: unpause

4. Features

1. All tetrominoes
2. Animations
3. Colored pieces
4. Drop: soft drop
5. Drop points: 1 * fall_height
6. Faster levels: speed = log2(lines)
7. Game over detection
8. Gravity
9. Horizontal movement
10. Line clearing
11. Line clear points:
    • Single: 32
    • Double: 96
    • Triple: 160
    • Tetris: 224
12. No bugs
13. No ceiling
14. Pause: pause emulation
15. Placement transition: increase brightness
16. Rotation

5. How to play

1. Download the archive
2. Download DOSBox
3. Move 4is256.com to ~/dosgames
4. Setup AUTOEXEC
5. Run the command for your operating system:
   • Windows:

     dosbox -c 4is256

   • MacOS:

     /Applications/dosbox.app/Contents/MacOS/DOSBox -c 4is256