Robert Allan JamesandClaude Sonnet 5
a32b0ebcbe
New rpi5_mailbox_get_framebuffer() sends one property-tag request buffer (phys size, virt size, depth, pixel order, virtual offset, allocate-buffer, get-pitch) over the register layout rpi5_dtb.c already discovers, populating an Rpi5FramebufferInfo kept in exact field-for-field sync with uefi.h's FramebufferInfo so console.c/vt100.c/framebuffer.c need no downstream changes once this is wired into a real entry stub. Register offsets (+0x00/+0x18 MBOX0 read/status, +0x20/+0x38 MBOX1 write/status) confirmed against a Pi-5-specific bare-metal reference, independently cross-checked against this codebase's own rpi5_dtb.c translated base address. Caught and fixed a real buffer-overflow bug before compiling: the static request buffer was sized 32 words against an actual 35-word requirement for the 7-tag sequence, recomputed exactly rather than re-estimated; resized to 40 words. Two things flagged as genuinely unverified against real hardware (not guessed past the comment): the allocate-buffer tag's request-size field value, and whether its response address needs classic bus-alias masking on Pi 5 specifically. Compile-only-verified -- no caller yet (that's the still-open entry-stub/DTB constructor items). Verified 3-arch boot to ok>/zuse)ok>. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_019YcT3H2PQeyujrzjqS3Var
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