 Another version of BBC BASIC, called BAS128, was supplied on tape and disc with the BBC Master and Master Compact; it loaded into main RAM and used the 64 kB of Sideways RAM for user programs.This provided support for much larger programs at the cost of being a lot slower than the normal ROM-based version.The interpreter can deal with both BASIC and 6502 assembly language, which can be included between the [ and ] characters.