Uses of the Super modifier in Symbolics Genera

Bottom line

Super acquires a more recognizable visual-interface role in Genera than it had in the public CADR software. Its strongest recurring patterns are:

• horizontal rather than vertical scrolling;
• operations on marked screen text;
• operations on Dynamic Windows presentations rather than raw text;
• application-local structural editing in Concordia, Compare/Merge, VC, and NS;
• condition-specific debugger choices; and
• Macintosh Command-key equivalents in the Mac integration layer.

It still is not one universal semantic tier. Zmacs also uses Super merely to form numeric arguments, and several dispatchers deliberately strip or ignore it.

Evidence boundary and method

The selected source profile is the Genera 8.5 licensed sys.sct tree from the museum's Open Genera media. The tree contains 5,075 files and is identified by the licensed archive SHA-256 89fb3e76b91d612834f565834dea950b603acf8f9dbacacdd0b1c3c284a2d36e. No licensed source is reproduced here.

The audit searched the selected logical source versions for:

• abbreviated and long character literals containing the Super bit;
• keyboard accelerators, ZWEI comtabs, Function/Select registrations, and Command Processor tables;
• Dynamic Windows gestures, presentation translators, and pointer-character maps;
• direct modifier-bit tests and modifier-normalizing dispatchers;
• compiled-only application inventories already reconstructed in the museum; and
• commented compatibility/debugging blocks, which are labeled inactive below.

The result is source-profile complete for explicit character literals and named gestures in the inspected tree. Optional patches, site/user initialization, world mutation, and compiled products without readable definitions remain distinct oracle layers.

S- means Super and Sh- means Shift. A chord appears here if Super is one of its bits, even when Control, Meta, Hyper, or Shift are also held.

Application summary

Zmacs and ZWEI

Dynamic Windows and the Input Editor

Select and Function prefixes

Genera's activity selector uppercases the suffix, records whether Control was present, then strips all modifier bits:

Super-Select E -> Select E
Control-Super-Select E -> Control-Select E -> force creation when valid

Super does not request a distinct application. The Function prefix instead preserves modifier bits for exact registry matching, so a loaded subsystem may register a genuinely Super-bearing Function suffix.

Concordia separately watches Super-Select as an application-switching chord; its selected hook recognizes only E, P, and G, despite a manual describing four destinations.

Debugger

The Genera debugger constructs condition-specific choices beginning with Super-A. As on System 303, letters are positions in the current choice vector, not fixed global commands. The display policy can prefer Resume, Super choices, or both. The base source also associates Super-Shift-C with :STORE-NEW-VALUE.

A museum runtime probe confirmed two dynamically constructed Super choices for its synthetic condition. See Genera debugger and Display Debugger.

Concordia and Writer Tools

Concordia makes Super its primary structural-document modifier:

NSage also installs Super-Meta-L for Process Line at Point and Super-$ for Hyphenate This Word. The complete command and source/manual discrepancy audit is Concordia, structured documentation, and book design.

Compare/Merge and Version Control

Metering Interface

Installed documentation assigns Super-Left to Show All Descendants, while the inspected component source assigns that operation to Super-Control-Left and uses Super-Left for the thresholded ladder. The disagreement remains a runtime oracle. See Metering and performance analysis.

NS electronic-design applications

The NS family uses Super extensively in pointer chords. These tables contain every Super-bearing chord in the recovered core inventories.

Macintosh integration

Genera's remote Macintosh UI treats Super as the local analogue of the Mac Command key:

Undo is named by the standard Edit template, but the audited remote editing path does not establish a direct handler for every template entry. See RPC, embedding, UX, and Macintosh integration.

Bitmap Editor and Graphic Editor

The selected files contain strict-compatibility forms inside block comments:

Because the forms are inside #|| ... ||#, they are not active selected-source bindings. They are preserved as optional compatibility/debugging evidence, not reported as live commands. The visible products and their other active controls are documented in Bitmap editors and Graphic Editor.

Other applications inheriting or specializing Super

Macsyma's entries are compiled-gesture evidence, not readable 421 source. Joshua, CLIM, and optional products can be absent from the base world even though their media/source records exist.

Network terminals and normalized dispatch

Genera's selected Telnet/ITP filters do not encode Super. Select dispatch also normalizes it to the base suffix. These are intentional negative mappings, not missing catalog entries.

Interpretation

Genera's most coherent Super idea is “operate on what the display means or how it is displayed”: presentations, marked screen regions, horizontal view position, or structural document/drawing objects. Applications are still free to repurpose it, as the debugger, Macintosh bridge, numeric reader, and specialized engineering tools demonstrate.

Sources and verification

• Genera 8.5 selected source files including zwei/comtab.lisp.~589~, cp/substrate-commands.lisp.~6~, dynamic-windows/dynamic-input.lisp.~498~, dynamic-windows/dynamic-window.lisp.~625~, debugger/debugger.lisp.~784~, concordia/comtab.lisp.~52~, Compare/Merge/VC, Metering, NSage, and embedding modules. Licensed source remains untracked.
• Genera Zmacs keybindings.
• Dynamic Windows reimplementation specification.
• The application dossiers linked from each section above.

Last verified: 2026-07-26.