Architectural Upgrade 2026-03-30: Modular Emacs, org-gtd v4.0, and PSF Phase 1

notes/closos-single-address-space.org

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+#+TITLE: CLOSOS: Single Address Space Architecture
+#+ID: closos-single-address-space
+#+DATE: 2026-03-22
+#+FILETAGS: :architecture:lisp:os:closos:
+
+* Concept
+In a Lisp Operating System (CLOSOS), all applications and the system kernel share one large, unified 64-bit address space. 
+
+* Key Principles
+- **Removal of IPC:** Standard Unix-style Inter-Process Communication (pipes, sockets) is replaced by global pointer sharing. Applications communicate by passing pointers to objects directly.
+- **Unified Memory:** Eliminates the overhead of data serialization/deserialization between isolated process boundaries.
+- **Language-Based Security:** Protection is not enforced by hardware MMU boundaries but by the Lisp compiler and runtime (e.g., strong typing, bounds checking, no arbitrary pointer arithmetic).
+
+* Source
+:PROPERTIES:
+:ID:       9c69a9ab-1c96-490e-9a8e-fbeafacba30e
+:END:
+- [[attachment:strandh-lispos.pdf][Robert Strandh, "CLOSOS: Specification of a Lisp operating system" (2013)]]