The first Amiga on the market, the Amiga 1000 appeared in 1985. It was based around the Motorola 68000 processor and a bunch of custom hardware. It originally shipped with 256K of RAM, though that was usually upgraded to at least 512K. The OS was read off disk on boot and stored in 256K of WOM, a feature it shared with early models of the Amiga 3000. All Amiga 1000s have the design team's signatures moulded into the inside of the case, along with the paw-print of Jay Miner (the chief designer)'s dog.