developer mode mod: game's developer switch on (warp with a+s, river log cheat), keys for the hidden aux inputs (fly, heart and fruit, idols, coins) on both exe versions

notes/mod-cheats.md

@@ -166,7 +166,7 @@ layout or low-memory mode), not a debug flag. Other constant getter cases: 0x5E/
 0x98, 0x9E, 0xC1, 0xD8, 0xED, 0xEE, 0x102 = 0; of the zero ids only 0 and 0x102 are read by any strat.
 No exe code writes padAux, and no other dev key handler was found beyond the table above (F4, F6, F7).
 
-Suggested "Developer mode" option for the cheats mod (not implemented): patch byte 0x552320 to 1
+Implemented as the separate mod `devmode` (see `mod-devmode.md`); original suggestion: patch byte 0x552320 to 1
 (or point jump-table entry 0x552A8C at a cave that pushes 0x1000, leaving the shared handler alone),
 and map keys to padAux in the pad poll: at the end of FUN_004256C0 (0x425B88, where padAux is only
 cleared when >1 pad) jump to a cave that builds padAux from the DIK state array 0x58226C + 4·DIK,

notes/mod-devmode.md

@@ -0,0 +1,57 @@
+# Developer mode (`devmode`, CHEATS)
+
+`mods/devmode/DevModeMod` + `DevModePatch` – two groove.exe patches, no data changes. Background and
+the full list of what the switch unlocks: `mod-cheats.md`, "Developer switch (property 258)".
+
+## Options
+
+| Key | Default | padAux bit | Effect |
+|---|---|---|---|
+| `flyKey` | F1 | 0x800 held | Llama (also from standing), LlamaChase, bunny rise while held; frog after a jump |
+| `heartKey` | F2 | 0x400 (pressed edge) | +1 heart, +5 purple fruit |
+| `idolKey` | F3 | 0x200 held | pink idols +1 per frame, max 99 |
+| `coinKey` | F11 | 0x100 held | coins +1 per frame |
+| `flyToggle` | off | – | fly key toggles bit 0x800 instead of hold |
+
+Keys are `Hotkeys.option` choices (cross-mod conflict check); defaults avoid practice F5/F8, freecam
+F7/F9 and the game's F4/F6/F10. The developer switch itself has no option (always on with the mod).
+Two equal keys → apply fails with a message.
+
+## Patches (German / English addresses, all via `Site`)
+
+1. **Property 258 = 1.0.** `PROP_GET` (0x550E60 / 0x550B80) is the strat property getter; its
+   `jmp [eax*4 + table]` has the table address at +21 (0x552684 / 0x552390, in .text). Entry
+   0x102 (0x552A8C / 0x552798) pointed at the shared `push 0` handler (0x55231B / 0x55198F; the
+   patch checks its bytes) and now points at a cave: `mov eax,[esp+14h]; push 0x1000; push eax;
+   call <push result>; add esp,8; add esp,10h; ret`. The other ids of the shared handler
+   (de: 0x75, 0x9E, 0xC1, 0xEE; en: 0xC1, 0xEE) stay 0. The table entry has a .reloc entry; the
+   exe always loads at its image base, so the absolute cave address is fine.
+2. **padAux from keys.** `PAD_POLL_END` (0x425B88 / 0x425A08, tail of the pad poll FUN_004256c0:
+   `mov eax,[padCount]; pop ebx; cmp eax,1; jbe; mov [padAux],0; add esp,8; ret`, 25 bytes) →
+   `jmp` cave + NOPs. Cave: `pop ebx`, ecx = OR of the bits whose DIK slot in `KEY_STATE`
+   (0x58226C / 0x5818FC, s32[256] frames held, all 0 while Alt is held) is > 0, 0 while `DEMO`;
+   `mov [PAD_AUX],ecx` (0x5FCF58 / 0x5FC5E8); `mov eax,[padCount]` (keeps the old return value);
+   `add esp,8; ret`. The edge detection padAuxPressed (FUN_00425c00, start of each tick) is
+   untouched and works as before. Toggle mode: 8 data bytes (previous key state, on flag).
+
+Hotkey names → DirectInput scan codes in `DevModePatch.DIK` (test: covers every `Hotkeys.VK` key).
+
+## Verified in game (apptest `devmode-a`, :25, German exe, village 1-1, defaults)
+
+* A+S three times: three different warp points (`img/mods/devmode_teleport.jpg`).
+* F2 twice: fruit 0 → 5 → 10, energy bar refilled.
+* F1 held 2.5 s: the llama rises above the village, falls back after release.
+* F3 held 1.5 s: idols 46; F11 held 1 s: coins 1 → 32 (`img/mods/devmode_keys.jpg`).
+* No crash; game starts normally with the mod (one crash in a Wine DLL at 68E9306B on the very
+  first start of a fresh session prefix, not reproducible in 3 later starts with the mod).
+
+Not checked in game: English exe (unit tests only), toggle mode, river log Space, 8-6 Space+Z,
+frog/bunny, LlamaChase.
+
+## Limits
+
+* Level-skip/music debug menu needs property 0 ≠ 0 as well (also hard-wired 0, used by 131 strat
+  reads incl. cameras) – deliberately not touched.
+* Toggle state survives level changes (flying continues in the next level until pressed again).
+* With the switch on, CheatTeleport stays alive in 22 levels; A+S (camera left+right together) is
+  the warp combo, so pressing both camera keys at once now teleports.