High Quality Content by WIKIPEDIA articles! XPL0 is a computer programming language that is essentially a cross between Pascal and C. It was created in 1976 by Peter J. R. Boyle who wanted a high-level language for his microcomputer and wanted something more sophisticated than BASIC, which was the dominant language for personal computers at the time. XPL0 is based on PL/0, an example compiler in the book Algorithms + Data Structures = Programs by Niklaus Wirth. The first XPL0 compiler was written in ALGOL. It generated instructions for a pseudo machine that was implemented as an interpreter on a Digital Group computer based on the 6502 microprocessor. The compiler was converted from ALGOL to XPL0 and was then able to compile itself and run on a microcomputer. XPL0 soon proved its worth in a variety of products based on the 6502.

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