MESH.md step 3. The ports are the transport; the message is what is transported: to, from, type, heat and TTL, ACL tag, sequence, length, then text four characters to a word. - quit.v4: a node with nothing to do is blocked reading "any port"; text for it is interpreted; (FINISH) sends what it printed and then how the text ended, and it waits again - core.v4: EMIT keeps what is printed, (FLUSH-OUT) and (HDR) send it to the sender on the port the message came on. EMIT still needs one free data cell and no more; it works on the return stack and in A and B - message.h/.c: the same format for whatever is on a port and is not a node - boot.c: the boot is the node's console on port 1 and its kernel on port 0 - the prompt tests are a console that speaks messages - gone: v4_line_begin, v4_line_done, v4_line_status; writing a node's input buffer and setting its P from outside; any use of CONSOLE-TX Verified: make -C v4 test (test_host_quit.c 1283 checks, the full-stack figures unchanged) and make -C v4 sanitize pass; hosted-check passes on three ISAs with POST 550 of 550; clean qemu with STARFORTH_V4=1 passes POST and answers lines typed at each prompt on amd64, aarch64 and riscv64 (logs/20261006-110551, -111621, -111341). -110837 is an aarch64 run ended by the test wrapper's limit while still in UEFI firmware; it shows nothing about v4. Not done: KEY, EXPECT and QUERY still read the console's input registers; a message not for this node is let go (step 4). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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 |
workload-0.4th … workload-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