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Add a BIOS subsection covering usage (Pillow dep, SL0P_TEXT/SL0P_FONT
knobs, the preview PNG), how the in-place $0607 blob patch works, and
why the forked binary stays out of git while the generator ships.
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git-clang-format scopes formatting to the lines each commit touches -
a full-file reformat would destroy the deliberately dense hand
formatting (opcode tables, multi-statement helpers). The hook re-adds
formatted files (git-clang-format --staged fixes the worktree, not the
index) and refuses partially-staged C files rather than mixing staged
and unstaged changes. Enable once: git config core.hooksPath hooks
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The Architecture table listed the core sources as bare filenames
(types.h, cart.c, ...), but they live under src/. Prefix them with
src/ so the paths actually point at the files.
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- Rewrite argument handling: the ROM is now the final argument and options
precede it (parsed in argv[1..argc-2] so optional-value flags never swallow
the ROM). Add grouped --help/-h, unknown-option errors, and clear 'missing
value'/'no ROM' diagnostics.
- Add --chrome, --palette/--green, and --bios flags; set the display/capture
options before the --shot and recording paths so screenshots and recordings
honor them. Make --shot dump the composited capture frame.
- gbctl: pass the ROM last when spawning the emulator.
- gitignore the (copyrighted) bios/ directory; document all new flags.
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- --headless: no rendering/TUI; serial TX -> stdout, RX <- stdin (nonblocking)
- generalize serial: serial_out_fd/serial_in_fd on the GB; internal-clock
transfer now shifts in a real RX byte (from stdin) instead of always 0xFF
- paced to native speed by default, --uncapped for turbo; pipes/scripts cleanly
- README: document headless serial console
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Two socket features for building reproducible showcase clips:
- record start <path> [everyN] / record stop: append the RGB888 framebuffer of
each produced frame to a flat 'GBCV' capture file (downsample with everyN).
tools/gbgif.py turns it into a GIF (or PNG frames). Capture is decoupled from
wall-clock/turbo/frameskip, so timing is always correct.
- input play <path> [reset] / input stop: drive the joypad from a synthesized
TAS-style movie (text: '<frames> [buttons...]' per line), frame-locked so
replay is deterministic. 'reset' does an exact power-on (preserve cart
ROM+SRAM, zero all other state) so a movie replays byte-identically -- verified
by hashing two runs. tools/gbmovie.py is a Python builder for movies.
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Replace the input-only FIFO's limitations with a Unix-domain socket control
channel (--sock) that is a superset of the button vocabulary plus emulator
introspection: read/write bus memory, get/set CPU context, single-step, PC
breakpoints, value-change watchpoints, run/pause. Being a socket it replies to
each command and broadcasts async 'event stop ...' lines; a stored last-stop
record (stopinfo) lets per-request clients recover a missed event.
Add gbctl: a stdlib-python CLI that spawns a tmux pane running the emulator on
a ROM, auto-resolves the socket, and drives it with terse verbs (cpu/read/write/
reg/step/break/watch/continue/pause/press/hold/screen/stop). The FIFO stays as
legacy input-only.
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Emulation always runs at native rate (correct game speed); --frameskip N draws
only 1 of every N+1 frames so a slow terminal no longer bottlenecks the loop.
Adds --fps cap, --uncapped/--turbo, live [ ] and f keys, HUD readout, and an
exit summary of emulated-vs-drawn fps. Replaces the confusing --render-fps.
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Adds --fifo [path] opening a named pipe that accepts button commands from any
process. Supports momentary taps (a, start, name:N), deterministic hold/release
(+name / -name), and 'release'. Merges with keyboard input; held state carries
true key-up semantics the terminal can't provide. GBC_INPUT_DEBUG traces state.
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Only cells that changed since the previous frame are redrawn, using cursor
positioning to skip unchanged runs. Static screens write nothing after the
first frame (~108x reduction on acid2). SIGWINCH forces a full repaint.
Verified pixel-exact against the framebuffer (11520/11520 cells, 0 mismatch).
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