Robert Allan JamesandClaude Sonnet 5
bb84eba7e3
Verified live on amd64: booted with the xHCI controller present but no USB device attached (no Port Status Change at ok>), then hotplug-attached a virtual USB thumb drive via QMP (usb-storage on xhci0.0, backed by disk/usb-thumbdrive-test.img) and got an immediate port status change event -- the real connect trigger Milestone 2e's PORTSC handling will consume next. Confirmed blk_subsys_attach_device() (src/block_subsystem.c) is already the correct integration point for USB -- it already appends a new device to the end of the existing LBN chain, matching the intended design. Documented the remaining gaps: no blkio_usb.c backend yet, no hot-detach path in the device chain yet. Decided the on-drive layout for USB thumb drives: GPT-partitioned (unlike artemis.img's whole-device StarForth header), ~1GB metadata partition + remainder for blocks, 16GB reference drive size, sizing tentative. No GPT parser exists in kernel code yet -- new prerequisite work for Milestone 2h/3, not blocking current 2e work. disk/usb-thumbdrive-test.img added as a tracked test fixture, per this repo's standing convention that virtual disk/thumb-drive images used for testing are committed, not left in scratchpad. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01HZ8kNoTuP63pbQtro4qvrm
capsules/
FORTH personality files loaded by the VM at boot. A capsule is an immutable, content-addressed payload; its XXHash64 hash is its identity. Any mutation changes the hash and the birth protocol rejects the image.
Key files
| File | Type | Purpose |
|---|---|---|
init.4th |
(m) MAMA_INIT |
Default Mama VM personality — loaded at LBN 2048 |
ACL.4th |
user | Word-level ACL system; self-activating at boot |
zuse.4th |
user | Bootstrap superuser; loaded by ACL.4th |
doe.4th |
user | DoE workload words (EXEC-DOE) — opt-in |
init-0.4th … init-9.4th |
(p) |
Numbered personality variants |
init-l8-*.4th |
(p) |
L8 Jacquard mode variants (stable/volatile/diverse/temporal/transition/omni) |
hermes/init.4th |
(p) |
Hermes baby VM personality |
artemis/init.4th |
(p) |
Artemis baby VM personality |
Block namespace
Block ranges are shared across all loaded capsules — collisions cause silent word-definition overwrites.
| Range | Owner |
|---|---|
| 2048–2099 | init.4th |
| 2100–2199 | doe.4th |
| 3000–3999 | workload capsules |
| 4000+ | user-defined (ACL.4th, zuse.4th, …) |
Each block is limited to 1024 bytes. Verify with wc -c before committing.
See also
experiments/bare_metal/README.md— DoE protocols and block namespace rulesdocs/03-architecture/word-acl/DESIGN.md— ACL system designtools/mkcapsule.c— assembles capsules intocapsule_generated.c- Project root