0xrsydn/gameboy-rust
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feat(power): implement keypad-wake STOP and BIOS Stop service

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Separate Running, Halt, and Stop states. Complete the entering instruction before freezing CPU, DMA, timers, display, and externally supplied clock advances. Wake STOP through the live enabled keypad condition without creating a clock-off IF request.

Implement original ARM SWI 0x03, preserve caller state, and expose zero-cycle StopIdle plus stopped frame-runner results. Retain DMA state, timer phase, and captured frames across sleep. Document keypad-only wake and unverified oscillator/edge timing.

Add core, BIOS, and demo regression tests; preserve BIOS-only access and failed-store isolation. Validated on Darwin arm64 with debug/release workspace and core/demo suites, Clippy, rustdoc, ten native window smoke tests, and terminal demos.
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0xrsydn 2026-10-05 18:27:35 +07:00
commit c836944c2e
20 changed files with 748 additions and 105 deletions
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README.md
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@ -39,7 +39,7 @@ Run `direnv exec . cargo run --locked -- --help` to list every demo and smoke te
| [docs/architecture.md](docs/architecture.md) | Crate boundaries and a file-by-file map |
| [docs/hardware/cpu.md](docs/hardware/cpu.md) | ARM/Thumb execution rules, modes, exceptions, and timing |
| [docs/hardware/bios.md](docs/hardware/bios.md) | The original BIOS replacement and each supported service |
| [docs/hardware/timers-irq.md](docs/hardware/timers-irq.md) | Timers, interrupt registers, HALT, and power control |
| [docs/hardware/timers-irq.md](docs/hardware/timers-irq.md) | Timers, interrupt registers, HALT/STOP, and power control |
| [docs/hardware/dma.md](docs/hardware/dma.md) | DMA channels, triggers, and timing |
| [docs/hardware/display-timing.md](docs/hardware/display-timing.md) | Display clock, status, IRQs, and scanline capture |
| [docs/hardware/video.md](docs/hardware/video.md) | Backgrounds, sprites, mosaic, windows, color effects, and input |