Decimal/Hex Conversion: A Few Techniques – Butterfield, Jim
The Transactor Volume 2, No. 1, May 1979, p. 2
Techniques for converting decimal values to hexadecimal in immediate mode.
Review: BASIC for Home Computers – Butterfield, Jim
The Transactor Volume 2, No. 1, May 1979, p. 9
Review of BASIC for Home Computers by Bob Albrecht, LeRoy Finkel, and Jerald R ... ohn Wiley & Sons, 1978).
Merging PET Programs: A Final Report – Butterfield, Jim
The Transactor Volume 2, No. 2, June 1979, p. 5
BASIC snippets for merging programs and data files on tape.
Memory Locations for ROM Upgrade on PET Computers – Butterfield, Jim
The Transactor Volume 2, No. 2, June 1979, p. 14
Memory map for PETs with upgraded ROM.
A Few Routines from PET BASIC – Butterfield, Jim
The Transactor Volume 2, No. 3, July 1979, p. 21
Memory maps of BASIC routines in original and upgrade ROM PETs.
Disabling the STOP Key – Butterfield, Jim
The Transactor Volume 2, No. 4, August 1979, p. 7
Two methods for disabling the STOP key in BASIC.
A Fast Sort – Butterfield, Jim
The Transactor Volume 2, No. 4, August 1979, p. 8
A "selective replacement" sort routine written in BASIC.
Memory Map: Original ROM to Upgrade ROM – Butterfield, Jim
The Transactor Volume 2, No. 5, October 1979, p. 3
Conversion table to cross-reference ROM locations between original and upgrade ROM PETs.
Cassette File END Markers – Butterfield, Jim
The Transactor Volume 2, No. 5, October 1979, p. 7
Writing an END marker to tape in BASIC.
Screen Print Routine – Butterfield, Jim
The Transactor Volume 2, No. 5, October 1979, p. 13
Machine language routine that prints the screen on a 2022 or 2023 printer. Includes source code.
The IEEE-488 Bus – Butterfield, Jim
The Transactor Volume 2, No. 5, October 1979, p. 15
Technical description of the IEEE-488 bus; communicating with devices in BASIC.
Technical Comment on FOR/NEXT Loop Structures – Butterfield, Jim
The Transactor Volume 2, No. 5, October 1979, p. 22
Technique for jumping out of nested FOR loops in BASIC without overflowing the stack.