Open8-VGA

1. Click the screen and press any key to leave the welcome screen.
2. Press F5, then 7, then Y: the Tetris source loads into the editor.
3. Press F3. The machine assembles the 12 KB listing itself (about 5 s at real speed, or pick 16× turbo) and starts the game.
4. ◀ ▶ move, ▲ rotate, ▼ soft drop, Space hard drop, P pause, Esc quit back to the editor.

For the scrolling platformer, load example 8 the same way: ◀ ▶ run, Space jump, stomp the walkers and reach the flag.

Everything runs on an emulation of the actual boot ROM: the editor, the on-board assembler and the game are Open8 machine code. F1 opens the built-in manual. Your program text stays in this browser between visits, the way SRAM survives a RESET. F4 saves a program to one of four EEPROM slots and F6 loads it back; the EEPROM survives POWER, as on the real board.