Robert Allan James
ab96ac0970
Adds fb_draw_orientation_test() (framebuffer.c/.h): fills the four raster corners RED/GREEN/BLUE/YELLOW via fb_fill_rect. Wired into kernel_main.c calling fb_init() directly -- console_fb_init()/vt100_init() removed from the boot path, since vt100.c/console.c are superseded by the Console drawing-fabric redesign (FABRIC.md ss27) and should not be exercised even incidentally. The diagnostic caught a real, pre-existing bug on its first run: framebuffer.c's pack_pixel() had its FB_PIXEL_RGBX32/FB_PIXEL_BGRX32 branches swapped relative to UEFI GOP's own byte-order naming convention, producing a clean R<->B channel swap (G unaffected). Spatial placement was already correct -- no flip/rotation. Fixed by swapping pack_pixel's two return bodies to match framebuffer.h's already-correct doc comments; kernel_main.c's GOP-format switch needed no change. Also item 4.3.2 -- QEMU screenshot capability. scripts/qemu_screenshot.sh already existed (monitor socket + socat + HMP screendump), just unwired and unused this session. Redirected its PNG output to a new top-level fb/ directory (tracked in git, not logs/, not a gitignored temp dir) and added a python3+PIL fallback for PPM->PNG conversion since imagemagick isn't installed here. Left as a standalone script for now, not wired into a Makefile target. FABRIC.md items 4.3.1 and 4.3.2 marked done with acceptance evidence.
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