Resilient systems built with a
craftsman’s mindset.
Crusan & Co. is an engineering studio on the Oregon coast focused on original systems development, turnkey hardware kits, and dedicated technical support—home of our flagship product, AxisOS™.
What We Build
Deterministic software architectures, embedded system toolchains, and hardened field computing built by Crusan & Co.
AxisOS™
The flagship product of Crusan & Co.—a lightweight, freestanding operating system designed for micro-enterprise deployments, field kits, and embedded systems, operating in pure silicon RAM with zero unneeded abstractions.
Visit Flagship Site (axisos.pro) →Viewer Suite
A collection of fast, minimal tools for inspecting and understanding system telemetry and data structures. Built for clarity, engineered for speed, and free of bloat.
Download on GitHub →Analyzer
A deep-dive inspection, telemetry, and architectural analysis tool for AxisOS™ environments, hardware validation, and system verification routines.
In Active DevelopmentEnterprise Field Kits
Portable, ready-to-deploy hardware and software packages built by Crusan & Co. and powered by our flagship AxisOS™ platform—engineered for remote operations, field deployments, and independent operators.
Explore Kits on AxisOS.pro →Core Engineering Milestones
Built on our three foundational pillars—Honest, Auditable, and Owned—and engineered from first principles on the Oregon coast.
Systems that know what they don’t know. Ground truth over guesswork; no hallucinated certainty, no hand-waving.
Operations and code you can inspect at every layer—freestanding C99 and raw syscalls with zero black-box middleware.
You own the hardware and the unencumbered code outright. Zero cloud tether, zero subscriptions, zero phone-home licensing.
1. The RAMGAK Memory Bracket Protocol
Rooted in a practical binary-search bracketing method that Marc F. Crusan has applied and taught for over 30 years—and wired into the AxisOS C/syscall layer alongside Antigravity (AGY)—the RAMGAK Memory Bracket (named from the letters of AGY & MARC) replaces static RAMDisk guesswork with simple field discipline. Starting from /proc/meminfo at half of physical RAM (MemTotal / 2), the operator steps up halfway if more room is needed or down halfway when spare headroom remains—repeating after each bracket until the right balance for the Triad is locked into /etc/rc.
Practical 5-Step Bracketing
- Hardware Discovery: Read addressable physical RAM (
MemTotal). - 50% Opening Bracket: Mount
tmpfsat half of physical memory. - Triad Staging: Launch Agent Zero (:8081), Lite (:8080), and Axis-Agent (:8082).
- Halve the Difference: Step up halfway or down halfway after each test until satisfied.
- Boot Lock-In: Commit the settled size permanently into
/etc/rc.
Out-of-Band Mutual Safeword
Operational authority is guarded by an air-gapped mutual challenge-response safeword between Operator Marc F. Crusan, Agent Zero, and Node 001 over local loopback and serial wire—completely eliminating corporate PKI, expiring third-party certificates, and cloud OAuth dependencies.
Zero Cloud PKI Sub-1ms Dispatch2. The Silicon Doctrine: Permanent In-Memory Execution
Conventional single-board operating systems treat initramfs as a temporary staging loader before pivoting (switch_root) onto fragile micro-SD flash media—causing continuous log wear and filesystem corruption on sudden power loss. The AxisOS Silicon Doctrine discards the disk pivot entirely: the complete 123 MB operating system (compressed into a 32.5 MB axisos-initramfs.img) loads into physical LPDDR4 RAM in 1.5 seconds. Step 2 becomes the permanent runtime home, and the micro-SD card is unmounted and idle.
LPDDR4 Silicon vs. MicroSD
- Sustained Bandwidth: > 4,200 MB/s in DDR4 RAM vs. 18–25 MB/s on MicroSD (168× faster).
- Access Latency: < 50 nanoseconds in silicon vs. 5–15 milliseconds on flash (100,000× faster).
- RAM Footprint: Occupies <3% on a 4GB Pi 4 (<1.5% on 8GB), leaving >97% headroom for AI agents.
Power-Pull Immunity & axis-checkpoint
Because physical storage is unmounted at runtime, operators can cut power at any millisecond with 100% immunity to journal corruption. Background daemons never touch flash; state changes are committed strictly on operator command via /bin/axis-checkpoint.
3. Sovereign Code Ownership & Zero-Libc Architecture
Every binary, init supervisor, shell builtin, and network utility in the AxisOS micro-userland is original and purpose-built around Marc F. Crusan’s architecture—issuing raw svc #0 hardware supervisor calls directly to the monolithic kernel. There is no BusyBox, no musl, no glibc, no third-party init, no borrowed logic, and no derivative userland code. Because the entire stack is shaped exclusively by Crusan & Co. filenames, syscall stubs, linker scripts, and boot philosophy with zero copied third-party material, Crusan & Co. holds 100% exclusive authorship and commercial title.
Original Architectural DNA
- Direct Syscall Stubs: Custom AArch64 assembly (
syscall-main.S,crt0-bin.S,crt0-shell.S). - Custom Linker Script: Hand-mapped
linker.ldproducing self-contained static ELFs as small as 72 KB. - Sovereign Userland: Purpose-built
axis-loop(PID 1),axis-shshell, andaxis-heartbeat. - Zero-Bloat Stack: Zero-dependency · Zero-libc · Zero-imports · Zero-derivative · Zero-borrowed logic.
Total Commercial & Licensing Freedom
- ✔ License Anything: Proprietary commercial, dual-license, MIT, BSD, or AxisOS Public License.
- ✔ Ship Commercially: Turnkey hardware appliances and field kits with zero attribution baggage.
- ✔ Embed in Silicon: Flash into commercial SBCs and RP2350 nodes with zero copyleft contamination.
- ✔ Publish Globally: Uncontested authorship across all code, firmware images, and technical books.
Development, Hardware Sales & Tech Support
Crusan & Co. focuses on original systems development, turnkey hardware kit sales, and dedicated technical support for our flagship product, AxisOS™.
- ✓ Sovereign OS & Freestanding Kernel Development
- ✓ Embedded Systems, AArch64 & RP2350 Mesh Engineering
- ✓ Turnkey Micro-Enterprise Hardware Kits & Direct Sales
- ✓ Dedicated Product & Kit Technical Support
- ✓ Custom Firmware, Toolchains & In-Memory Systems
- ✓ Technical Books, Manuals & Reference Suites
AxisOS™ in Motion
Independent systems powered by Crusan & Co. engineering and our flagship product, AxisOS™—operating locally across homes, shops, and micro-enterprises.
Built for Real-World Operators
Honest · Auditable · Owned
Built on the Oregon Coast
Founded by Marc Crusan, Crusan & Co blends hands-on infrastructure experience with a craftsman’s dedication to quality. We reject unnecessary complexity in favor of pure, auditable, and deterministic engineering.
From custom operating systems running bare-metal on ARM hardware to autonomous agent meshes and field deployment kits, our solutions are built to be robust, understandable, and self-reliant.
Sales & Technical Support
Whether you’re ordering turnkey AxisOS™ hardware kits, requesting product technical support, or following our latest systems development.