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* rebrand: gbc -> sl0pboy (binary, README, tooling)gbc dev2026-07-171-6/+6
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* main: options-first CLI with --help, and wire up display/boot flagsgbc dev2026-07-171-36/+116
| | | | | | | | | | | | - 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.
* main/gb: --keys button-script harness + serial_no_eof for OSK testinggbc dev2026-07-161-0/+25
| | | | | | | | --keys "udlrabse." plays scripted joypad taps (each char = one button held 10 frames then released 10, so the guest sees a clean edge); pairs with --headless --shot to drive on-screen input and capture the result. When --keys is active, serial-RX EOF stays pending instead of sending $04, so a shell blocked on read waits for OSK input instead of exiting.
* main: --shot with --headless dumps final LCD on exitgbc dev2026-07-161-0/+8
| | | | | | | Lets scripted runs feed stdin to the serial console AND capture the resulting screen, e.g. printf 'ls\nexit\n' | gbc rom.gb --headless --shot 0 out.ppm Previously --shot ran frames with no stdin, so anything waiting on input (a shell) only showed its first prompt.
* headless: $ED opcode = clean power-off (exit + battery save)gbc dev2026-07-161-2/+2
| | | | | | | | The unused SM83 opcode $ED now sets gb->poweroff, which breaks the headless loop so the normal cart_free()->cart_save() path runs. Lets a guest OS shut the emulator down cleanly (and flush its .sav) instead of relying on an external timeout/SIGTERM, which could SIGKILL before the save. run_frame() also stops on poweroff so exit is immediate.
* headless: interactive TTY mode (raw stdin) for driving a guest OS livegbc dev2026-07-161-0/+17
| | | | | | | | When stdin is a terminal, --headless now disables canonical mode + local echo so keystrokes reach the guest immediately and only the guest echoes (no doubled chars). Piped/redirected stdin is untouched (scripted input still works). Keep ISIG so Ctrl-C quits; restore termios on exit. VMIN=1 so a no-data non-blocking read is EAGAIN, not a 0-byte read the serial layer would misread as EOF.
* serial: headless mode tying serial port to stdio for OS debugginggbc dev2026-07-151-1/+38
| | | | | | | | - --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
* control: video frame capture + deterministic input-movie replaygbc dev2026-07-151-0/+2
| | | | | | | | | | | | | | | 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.
* control: socket-based debug channel + gbctl CLI drivergbc dev2026-07-141-2/+27
| | | | | | | | | | | | | | 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.
* speed control: frame skipping to decouple terminal draw from emulationgbc dev2026-07-041-11/+61
| | | | | | | 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.
* input: external control channel via FIFOgbc dev2026-07-041-0/+10
| | | | | | | 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.
* terminal renderer (truecolor half-block), input, screenshot modegbc dev2026-07-041-3/+61
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* core emulator: SM83 CPU, MMU, timer, PPU, CGB supportgbc dev2026-07-041-0/+41
Passes blargg cpu_instrs (all 11), instr_timing, mem_timing.