Machine Language: Fast Interrupts – Butterfield, Jim

Compute!'s Gazette Special Section Volume 15, No. 2, February 1993, p. 18

Don't bog down your interrupts with slow code. Interrupts provide fast action, ... s. Includes source code.

Machine Language: Strange Opcodes – Butterfield, Jim

Compute!'s Gazette Special Section Volume 15, No. 3, March 1993, p. 18

Put an undocumented opcode to work. Unconventional opcodes sometimes do strange ... E. Includes source code.

Machine Language: Encryption – Butterfield, Jim

Compute!'s Gazette Special Section Volume 15, No. 4, April 1993, p. 18

Encrypt messages with your 64. Encrypt and decrypt secret messages using a keyw ... e. Includes source code.

Machine Language: Arrays – Butterfield, Jim

Compute!'s Gazette Special Section Volume 15, No. 5, May 1993, p. 18

Create an array with BASIC, and then use machine language to modify it. Working ... e. Includes source code.

Your Own Database – Butterfield, Jim

Compute!'s Gazette Special Section Volume 15, No. 5, May 1993, p. 36

A simple database program written in BASIC, with an explanation of its structu ... advice for modifying it.

Machine Language: Screen Screamer – Butterfield, Jim

Compute!'s Gazette Special Section Volume 15, No. 6, June 1993, p. 18

Touch a key and your screen changes immediately. Touch a single key and watch y ... s. Includes source code.

Machine Language: File End Check – Butterfield, Jim

Compute!'s Gazette Special Section Volume 15, No. 7, July 1993, p. 18

To read a file successfully, you must know how it ends. Testing for end-of-file ... e. Includes source code.

Machine Language: File-End Trimmer – Butterfield, Jim

Compute!'s Gazette Special Section Volume 15, No. 8, August 1993, p. 18

Delete extra Returns that cause file to crash. Read a file with BASIC's INPUT# ... e. Includes source code.

Machine Language: Boot Basics – Butterfield, Jim

Compute!'s Gazette Special Section Volume 15, No. 9, September 1993, p. 18

Load and run ML programs from BASIC. Load and run a machine language program fr ... om a BASIC boot program.

Machine Language: Assembler Tricks – Butterfield, Jim

Compute!'s Gazette Special Section Volume 15, No. 10, October 1993, p. 18

What the asterisk means. The asterisk signals the current working address as th ... es source code examples.

Machine Language: Squiggle Array – Butterfield, Jim

Compute!'s Gazette Special Section Volume 15, No. 11, November 1993, p. 18

Watch this line crawl across your screen at ML speed. Let Squiggle wander about ... e. Includes source code.

Machine Language: Branches and Jumps – Butterfield, Jim

Compute!'s Gazette Special Section Volume 15, No. 12, December 1993, p. 24

Branches, jumps, and subroutine calls. Three ways to change the flow of a machi ... w. Includes source code.