Symbolic Editor Change Notice

This document serves as an errata and update sheet for the PDP-8 Symbolic Editor Programming Manual (DEC-08-ESAB-D). It details specific corrections, textual updates, and operational changes required for the Symbolic Editor software. Key modifications include:

• Error Recovery: Updates to the "Erase" function (CTRL/U), clarifying its behavior in both text and command modes.
• Operational Logic: Clarifications regarding the behavior of the current line counter (.) following various commands (READ, APPEND, INSERT, DELETE, etc.).
• System Interrupts: New instructions and notes regarding the use of the switch register to interrupt output operations and handle "text buffer full" conditions.
• Documentation Edits: Various line-by-line text corrections for the original manual to improve accuracy regarding specific command behaviors and examples.