0xrsydn/gameboy-rust
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feat(core): add whole-machine save states with F5/F9 window slots

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Machine::save_state and load_state encode the CPU, every RAM, and every device
through Snapshot impls into a versioned, checksummed format. Rejected loads leave
the machine unchanged. The ROM window saves to and loads from one state file
with F5 and F9.
This commit is contained in:
0xrsydn 2026-10-08 21:39:16 +07:00
commit fd73788735
55 changed files with 5157 additions and 20 deletions
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docs/hardware/saves.md
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@ -130,7 +130,7 @@ The frontend persists changed bytes only on a clean exit:
An incomplete Flash command/operation refuses persistence and returns an error, even if no bytes changed yet.
CPU, DMA, rendering, window, or reported audio errors do not persist the session image.
There is no autosave, crash recovery, save-state support, or RTC persistence.
There is no autosave, crash recovery, or RTC persistence. [Save states](save-states.md) are a separate, whole-machine feature and do not replace the game's own save.
The emulator cannot detect a game's multi-command save transaction. Exiting between completed commands can still save incomplete game data.
A crash or forced termination loses changes since startup and can leave a stale lock.