Robert Allan JamesandClaude Opus 5
f81e9c92bc
fb_scroll_rows() hardcoded the pixel distance it physically shifts the framebuffer by as char_rows * 16 * scale -- the bitmap-font (font_8x16.c) cell height -- regardless of which glyph mode vt100.c actually had active. In TTF mode (the REPL's default, cell height 24px via VT100_TTF_CELL_H_PX) this meant every scroll_up(1) call physically shifted the framebuffer by only 16px while the text model (g_vt.rows, py_of()) placed each row 24px apart. That 8px-per-scroll shortfall compounds with every subsequent scroll: a few scrolls barely show it, but enough scrolls -- or scrolling quickly, which is just many scrolls in a short span -- accumulates into visible pixel overlap between rows, with newer lines drawn on top of the tail end of older ones. fb_scroll_rect() (the box-confined scroll added later for 4.4t) already carried a doc comment calling this out explicitly, describing its own explicit pixel_rows parameter as the fix for fb_scroll_rows()'s "fixed 16px-row assumption" -- fb_scroll_rows() itself was just never updated to match. Fixed by changing fb_scroll_rows()'s parameter from an implicit char_rows count to an explicit pixel_rows count (matching fb_scroll_rect()'s existing convention), and having its one caller (vt100.c's scroll_up()) pass lines * cell_h() -- the real active cell height -- instead of a raw line count for the callee to guess at. Verified: booted amd64 to the REPL (TTF mode active per sk_repl()'s own console_fb_enable_ttf() call), let boot chatter + WORDS output scroll the screen through thousands of accumulated scroll_up() calls, then measured every visible line's y-position via a QMP screendump. Spacing held at a perfectly consistent 24px (TTF cell height) top to bottom with zero drift -- the old hardcoded-16px bug could not have produced that after this many scrolls. Re-verified boot to ok> on all three architectures (amd64/aarch64/riscv64) per repo acceptance policy. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
include/
Public headers for the hosted StarForth VM (src/). Kernel-only headers
live under include/starkernel/.
Core VM
vm.h— theVMstruct and all core types (DictEntry,DictPhysics, stacks, dictionary state); the central header most other files include.vm_api.h— external VM API surface.vm_host.h,vm_debug.h,startup.h,version.h— host integration, debug utilities, startup sequencing, version string.cli.h,repl.h,io.h,log.h— CLI parsing, REPL loop, I/O, logging.word_registry.h— word registration system shared by everysrc/word_source/*.cfile.compudynamics.h— the generic compudynamics module: tuning-word/config lookups (cd_tuning_word(),cd_tuning_vm()) consumed byssm_jacquard.c.
Memory / blocks
memory_management.h,dictionary_management.h— dictionary allocator and search.block_subsystem.h,blkcfg.h,blkio.h,blkio_factory.h— logical→ physical block mapper and pluggable block I/O backends (file/RAM).platform_alloc.h,platform_lock.h,platform_time.h— platform abstraction shims (hosted vs. kernel allocation/locking/timing).
Physics-driven adaptive runtime (7 feedback loops)
physics_runtime.h— main physics coordinator.physics_hotwords_cache.h— Loop #1, execution-heat hot-words cache.physics_metadata.h— per-wordDictPhysicsmetadata tracking.physics_pipelining_metrics.h— Loop #4, word-transition prediction.physics_execution_hooks.h— execution instrumentation hook points.rolling_window_of_truth.h,rolling_window_knobs.h— Loop #2 circular execution-history buffer and its tuning knobs.inference_engine.h— Loops #5/#6, window-width and decay-slope statistical inference.dictionary_heat_optimization.h— Loop #1 heat counters.ssm_jacquard.h— L8 Jacquard steady-state mode selector.doe_metrics.h— Design of Experiments (2^7 factorial) metrics.profiler.h— performance profiling hooks.
Arithmetic / codegen
q48_16.h— Q48.16 deterministic fixed-point arithmetic (used instead of IEEE-754 float specifically to keep cross-architecture behavior bit-identical).math_portable.h— portable math helpers.arch_detect.h,starforth_config.h— architecture detection and the build-flag fallback-default layer (used when a.cfile is compiled by hand withoutmake).vm_asm_opt.h,vm_asm_opt_arm64.h,vm_asm_opt_riscv64.h,vm_inner_interp_asm.h,vm_inner_interp_arm64.h,vm_inner_interp_riscv64.h— per-architecture assembler-optimized inner interpreter (USE_ASM_OPT=1).
See include/starkernel/README.md for the bare-metal kernel headers.