Inside the 2040 Disk Drive – Butterfield, Jim
The Transactor Volume 2, No. 6, November 1979, p. 1
Explanation of the 2040's dual processors and the way they map the disk drive' ... or, December 1979, p. 3.
A Few Entry Points: Original/Upgrade ROM – Butterfield, Jim
The Transactor Volume 2, No. 6, November 1979, p. 11
Cross-reference table of entry points of BASIC ROM and Kernal routines on the ... de ROMs for the PET/CBM.
Simulated PRINT USING – Butterfield, Jim
Compute! Issue 9, Volume 3, No. 2, February 1981, p. 30
Formatted PRINT routine that pads numbers with leading spaces and trailing zeros.
Mixing and Matching Commodore Disk Systems – Butterfield, Jim
Compute! Issue 9, Volume 3, No. 2, February 1981, p. 104
Compatibility notes on the 2040 and 8050 disk drives and various PET ROM revisions.
Odds & Ends on PET/CBM Files – Butterfield, Jim
Compute! Issue 9, Volume 3, No. 2, February 1981, p. 118
Miscellaneous notes on working with tape and disk files on the PET/CBM.
Learning About Garbage Collection – Butterfield, Jim
Compute! Issue 10, Volume 3, No. 3, March 1981, p. 96
Directed experiments for observing garbage collection and techniques for reduc ... .0 or 2.0 ROM revisions.
Memo Diary – Butterfield, Jim
Compute! Issue 67, Volume 7, No. 12, December 1985, p. 65
Keep track of important dates, holidays, and personal events with this simple, ... date-handling concerns.
Commodore Dynamic Keyboard: Part 3 – Butterfield, Jim
Compute! Issue 67, Volume 7, No. 12, December 1985, p. 116
Parts 1 and 2 of this series showed how the dynamic keyboard technique—which al ... ng to a SEQuential file.
Advanced Commodore 128 Video – Butterfield, Jim
Compute! Issue 67, Volume 7, No. 12, December 1985, p. 118
Here's how to relocate screen memory and set up a custom character set on the C ... aracter sets on the 128.
Commodore Dynamic Keyboard: Part 2 – Butterfield, Jim
Compute! Issue 66, Volume 7, No. 11, November 1985, p. 106
Part 1 discussed the fundamentals of dynamic keyboard programming, which in eff ... ams via buffer stuffing.
Commodore Relative Files: Defensive Programming – Butterfield, Jim
Compute!'s Gazette Issue 50, Volume 5, No. 8, August 1987, p. 64
Relative files are a good way to store data for fast access. But many programme ... ith RELative disk files.