Relative File Mechanics – Butterfield, Jim

Compute! Issue 11, Volume 3, No. 4, April 1981, p. 122

Working RELative files in BASIC 4.0 on the PET/CBM.

Working With BASIC 4.0 – Butterfield, Jim

Compute! Issue 11, Volume 3, No. 4, April 1981, p. 136

Miscellaneous BASIC 4.0 tips: routing machine-language monitor output to print ... bling IEEE-488 timeouts.

Disabling the STOP Key – Butterfield, Jim

Compute! Issue 11, Volume 3, No. 4, April 1981, p. 141

Disabling the STOP key in BASIC for all PET/CBM ROM revisions.

Machine Language: The Wonderful Wedge – Butterfield, Jim

Compute! Issue 11, Volume 3, No. 4, April 1981, p. 152

Outline of the wedge technique for adding new commands to BASIC. Includes source code.

Machine Language: Getting to the Machine Language Program – Butterfield, Jim

Compute! Issue 12, Volume 3, No. 5, May 1981, p. 112

Techniques for making BASIC and machine language work together: calling with S ... achine language monitor.

The Revised PET/CBM Personal Computer Guide – Butterfield, Jim

Compute! Issue 12, Volume 3, No. 5, May 1981, p. 120

Review of the second edition of PET/CBM Personal Computer Guide by Adam Osborn ... orne/McGraw-Hill, 1980).

PET as an IEEE-488 Logic Analyzer – Butterfield, Jim

Compute! Issue 12, Volume 3, No. 5, May 1981, p. 128

Program displays the status of four of the GPIB control lines on the IEEE-488 bus. Includes source code.

RAM/ROMs—A New Style of Memory? – Butterfield, Jim

Compute! Issue 13, Volume 3, No. 6, June 1981, p. 4

Writeable RAM devices that plug into the ROM sockets of the PET/CBM, allowing for multiple configurations.

Keeping TABs on the Printer – Butterfield, Jim

Compute! Issue 13, Volume 3, No. 6, June 1981, p. 116

The TAB() function in BASIC is intended for screen display. Alternative method ... tab stops with printers.

Machine Language: Uncrashing – Butterfield, Jim

Compute! Issue 13, Volume 3, No. 6, June 1981, p. 128

Hardware methods to reset the PET when machine-language programs crash.

VIC as Super Calculator – Butterfield, Jim

Compute! Issue 14, Volume 3, No. 7, July 1981, p. 89

Introduction to direct mode on the VIC-20. Topics: arithmetic operators, variables, and loops.

Commodore ROM Systems: Terminology – Butterfield, Jim

Compute! Issue 14, Volume 3, No. 7, July 1981, p. 146

A proposed standard for naming PET/CBM ROMs, DOS versions, and BASIC revisions.