XC=BASICXC=BASIC is a dialect of the BASIC programming language for the Commodore 64 and xcbasic64 is a cross compiler that compiles XC=BASIC source code to 6502 machine code. Changes: IF / ELSE / ENDIF, WHILE / ENDWHILE, REPEAT / UNTIL, PRAGMA , LSHIFT / RSHIFT, MEMCPY, MEMSET, MEMSHIFT, WATCH, WAIT, PETSCII, ENABLEIRQ / DISABLEIRQ and XCB Invaders (game).