Unsigned Decimal Print

Summary: This document provides the documentation and source code for a PDP-8 subroutine designed to print the contents of a computer word as a 4-digit, positive, decimal integer.

• Requirements: Requires 38 core locations and a basic PDP-8 system with an ASR 33 teletype.
• Usage: The subroutine is loaded via Binary Loader and called using the JMS instruction, with the target value held in the Accumulator (AC).
• Methodology: The program functions by repeatedly subtracting powers of ten (1000, 100, 10, 1) from the input number to determine each decimal digit, which is then outputted sequentially.
• Limitations: The subroutine outputs only the four digits; it does not handle signs, spacing, tabs, or carriage returns.