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Leo J. Scanlon
List of program examples. An introduction to the 6502 microprocessor. The 6502 microprocessor instruction set. Subroutines. Lists and look-up tables. Mathematical routines. Number-base conversion. Interrupts and resets. General-purpose input/output devices. Microcomputer input/output. ASCII character set (7-bit code).
William Ford, William R. Topp