The CPC implementation of Locomotive BASIC was developed directly from [[Locomotive Software]]'s existing Z80 BASIC. The existence of this is cited as one of the reasons Locomotive requested that [[Amstrad]] change the CPC's processor from a 6502 to a [[Z80]].
The 464 (and some 472) shipped with BASIC 1.0 on ROM.
The language was revised and debugged for the 472, 664, 6128 and Plus machines to become BASIC 1.1. Changes were minor but significant for the programmer, and included: