The Spectrum 128, first launched in Spain in 1985, and looked exactly the same as the Spectrum+ except for the addition of a large (and very hot) heat sink on the right-hand side. Inside the casing, though, were some genuine changes. Most obvious was the 128K of memory, of which you could use about 104K (the rest being used to hold a copy of the ROM). A new three-channel sound chip, very similar to that used later on the Atari ST, was also included, as was a new implementation of Sinclair BASIC and a variety of sockets. The Spanish version included a separate numeric keypad, which was not sold elsewhere, making it a very rare item today.