PDP-11 Keypad Editor Reference Card

This document is a reference card for the PDP-11 Keypad Editor (KED/K52), designed for use with VT100 and VT52 terminals. It outlines various functions and commands for text editing.

Key Features and Functions:

1. Keypad Usage (VT100 & VT52): Explains how to use the dedicated keypad. The PF1 (GOLD) key is crucial, acting as a shift key to access the lower/secondary function printed on each keypad key. Specific keypad layouts are provided for both VT100 and VT52.
2. Common Keyboard Functions: Lists standard text manipulation shortcuts:
   • DELETE: Erases character to the left.
   • LINEFEED: Erases word to the left.
   • CTRL/U: Erases line to the left and stores it in a buffer.
   • CTRL/W: Repaints the screen.
   • CTRL/C: Cancels commands/processes.
   • GOLD integer: Repeats a function multiple times (except DELETE, SPECINS).
3. Editor Operation:
   • Starting: Use RUN command or specific file specification formats (filespec/I, filespec/C, filespec=old filespec) depending on RT-11 or RSX-11 systems.
   • Stopping: QUIT (discards changes), EXIT (saves changes). CTRL/C or CTRL/Z can return to the monitor or start a new session.
4. Cursor Movement: Functions for moving by character, word, line (BLINE, EOL), file (TOP, BOTTOM), page, or section. ADVANCE and BACKUP control directional mode.
5. Text Insertion:
   • Direct typing for printing characters.
   • SPECINS: Inserts non-printing characters using their ASCII decimal equivalent with the GOLD key.
   • OPENLINE: Inserts a new line.
6. Erasing and Restoring:
   • Functions like DELCHAR, DELEOL, DELETE, DELLINE, DELWORD, LINEFEED erase text and store it in specific buffers (character, word, line buffer).
   • UNDELCHAR, UNDELLINE, UNDELWORD restore text from these buffers.
7. Searching:
   • FIND: Initiates a new search.
   • FINDNEXT: Finds the next occurrence.
   • SET SEARCH commands allow specifying search behavior (case sensitivity: GENERAL/EXACT, cursor placement: BEGIN/END, search limits: BOUNDED/UNBOUNDED).
8. Select Ranges:
   • SELECT: Marks one end of a text range for operations.
   • Functions on Select Range: APPEND (copies), CUT (moves to paste buffer), FILL (reformats lines), REPLACE (replaces with paste buffer content), CHNGCASE (changes case), WRITE SELECT (writes to auxiliary file). RESET cancels the selection.
9. Macros: LEARN (starts recording commands/functions), GOLD S (stops), GOLD X (executes the current macro).
10. File Management: Commands to OPEN INPUT/OUTPUT auxiliary files, CLOSE, PURGE, INCLUDE (copy), SKIP, and WRITE (to auxiliary files).
11. Configuration Commands:
    • SET ENTITY PAGE/SECTION: Defines what constitutes a page or section (by string or number of lines).
    • SET TABS: Configures structured tabs (GOLD A/D/E for adjustment).
    • SET WRAP: Sets word-wrap margin.
    • SET SCREEN: Adjusts VT100 display settings (80/132 columns, light/dark background).
12. CTRL Key Functions: Details the behavior of various CTRL key combinations (CTRL/C, CTRL/O, CTRL/Q, CTRL/S, CTRL/U, CTRL/W, CTRL/Z) for canceling, repainting, interrupting output, and returning to the monitor.
13. Technical Details: Includes a table of special graphic symbols and details buffer capacities for character (2 bytes), word (80 bytes), line (132 bytes), and paste (minimum 512 bytes).