Six Versions of the Same Program

This document presents six different versions or representations of a specific PDP-12 program. The program is designed to continuously sample an Analog-to-Digital (A/D) channel, with the channel selection determined by Right Switches 8-11, and then display the octal representation of the sampled voltage on an oscilloscope screen.

The document includes:

1. Program Description: An abstract detailing the program's function, its characteristics (LINC programming mode, Assembly language using the DIAL system, starting address 4020 octal), a flowchart illustrating its logic, and definitions of its key variables.
2. Source-program listing: The complete assembly language source code of the program, along with operating instructions.
3. Source-program on paper tape: A visual representation of the source code stored on punched paper tape.
4. Source-program on magnetic tape: A visual representation of the source code stored on magnetic tape.
5. Assembly listing: A detailed listing showing the memory addresses, compiled object code, and corresponding assembly source code with comments.
6. Binary ("object") program on magnetic tape: A visual representation of the final compiled executable program stored on magnetic tape.

The introductory page notes that the paper tape step (version 3) is optional if a magnetic tape-oriented assembler is available, and mentions other possible forms such as "Quick Listing," Dump listing, and Binary paper tape.