Mac68k Games - Macintosh 512K games in the browser

1. Your Macintosh ROM none yet

The Mac 512K runs entirely in your browser (Mini vMac as WebAssembly). Its 64 KB ROM is Apple's and is not shipped here: choose your own Mac128K.ROM (exactly 65,536 bytes) once. It is kept in this browser's storage and never uploaded. More about the ROM.

2. Disk, network and power

Panzer Network tank game: two teams of four over AppleTalk, bots fill the empty tanks. Everybody on the same network name plays together. N network game, Return, S starts; W/A/S/D drive, mouse aims, click fires, Space next weapon. SpaceShoot 3D wireframe space shooter: shoot the objects coming at you, survive as long as you can. Single player. Click to start, mouse aims, click fires, Q quits. Box In Close off the playfield with walls while the balls bounce: 80 % ends the level, a hit wall costs a life. Single player. Click starts a wall, Space turns the cannon, Q quits. Morris 8 Nine Men's Morris (Mühle) against the Morris8 AI with endgame tables; time per move and the players from the menus. Single player. You are White: click a node to place, drag to move. Tetris Tetris with music and sound effects from the Mac's sound buffer. Single player. A/D move, W/S rotate, X fast, Space drops, P pauses. Snake Deluxe 12 levels in 4 themes, bonus fruit, beetles, music and effects, high score table. Single player. Space starts and pauses, W/A/S/D steer, M music, Q quits.

Network: "public" is the one everybody is on. Any other name is a private cable: share the link ?net=... with your friends.

not connected

Choose your ROM above, pick a disk and switch the Mac on.

Choose your ROM above, then pick a disk and switch the Mac on.

Click into the screen so that keys reach the Mac. Sound comes on with the first click. The Mac runs at its original speed (8 MHz 68000), the boot from the floppy takes about 25 s. Emulator keys: Ctrl-M size, Ctrl-F full screen, other Ctrl keys open Mini vMac's control mode (Ctrl-H help).

About the ROM, the disks and the network

ROM. The Macintosh 128K/512K needs its 64 KB ROM to boot. Apple owns it, so this site does not provide it. If you own such a Mac you can read the ROM out of it; the file is 65,536 bytes, often named Mac128K.ROM (its checksum is 28BA61CE). The file goes straight from your disk into your browser's storage (IndexedDB, with a copy in localStorage); the page never sends it anywhere ("Forget ROM" deletes it). The browser may still throw the storage away: private/incognito windows lose it when they close, and iOS Safari deletes a site's storage after 7 days without a visit (adding the page to the home screen prevents that).

Disks. Panzer.dsk, SpaceShoot.dsk, BoxIn.dsk, Morris.dsk, Tetris.dsk and SnakeDeluxe.dsk are 400K MFS floppies with System 3.2 and the game as the startup program; the site serves them and the browser Mac boots from the one you picked (?disk=panzer, spaceshoot, boxin, morris, tetris or snakedeluxe in the link). "Insert disk & restart" reboots the Mac from another disk at any time. Only Panzer uses the network; the others are single player. Nothing you do on a disk is saved.

Network. The emulated Mac's LocalTalk port is connected, frame by frame, to a small relay over a WebSocket. Everybody on the same network name shares one cable: the Macs find each other with AppleTalk's NBP exactly as they would in an office in 1986. Only raw LocalTalk frames travel; there is no account and no chat. Bots drive whatever tanks have no human.

The games: 68000 assembler, built with mac68k-asm. Emulator: Mini vMac (GPL 2), compiled with Emscripten, with the LocalTalk-over-WebSocket transport, an SCC/VIA timing fix and a MOVEP fix of this project.