Machine Language Programming: Debugging – Butterfield, Jim

Compute!'s Gazette Issue 63, Volume 6, No. 9, September 1988, p. 46

Debugging with breakpoints using a machine-language monitor (MLM). Includes source code.

Machine Language Programming: All About Numbers – Butterfield, Jim

Compute!'s Gazette Issue 64, Volume 6, No. 10, October 1988, p. 40

Converting the ASCII representation of a number to binary. Includes source code.