Teletype Output Subroutines

This document describes a package of subroutines designed for the PDP-8 computer to control ASR-33 teletype output. Key features include:

• Functionality: The package handles common formatting characters, including carriage return, line feed, space, and tabs. It also supports digit printing and character output, with the ability to simulate tabulation stops.
• Technical Specifications: The subroutines occupy 74 (decimal) core locations.
• Usage: The code is intended to be loaded via the Binary Loader (Digital-8-2-Rim). Subroutines are called using the JMS instruction.
• Internal Representation: Characters are managed via 6-bit codes for packed storage and conversion to 8-bit ASR-33 codes, while digits are handled via 4-bit codes.
• Program Content: The document includes a full assembly listing of the subroutines, including address labels, machine code, and assembly-level comments explaining the operation of each routine.