pinball/inder.cpp: Add an unknown gambling game on Inder pinball hardware (#12325)

New systems marked not working
------------------------------
Unknown gambling game on Inder pinball hardware [Arcade Planet, Recreativas.org]

src/mame/pinball/inder.cpp

@@ -1,11 +1,11 @@
 // license:BSD-3-Clause
-// copyright-holders:Robbbert
+// copyright-holders: Robbbert
 /*******************************************************************************************************
 
 PINBALL
 Inder S.A. of Spain
 
-All manuals are in Spanish (including the 'English' ones), so some guesswork will be needed.
+All manuals are in Spanish (including the 'English' ones).
 The schematics for Brave Team, Canasta are too blurry to read.
 Each game has different hardware. Note with switches: "Veleta" is normally closed.
 Order of dips on "new cpu" games: 3,2,1,0,4,5,6,7 (so SL1(1) uses bit 3 of input definition).
@@ -19,8 +19,11 @@ Note
 - La Rana is not a pinball machine - it looks like an upright arcade game with a frog's mouth and some
    holes on a lower panel, while some indicators are on the upper panel. The main scores are on the
    marquee. Each of 4 players has 3 digits. There's other buttons on the marquee too. The game has
-   no screen. The purpose and usage of the game is unknown. Unable to get a manual, although it is known
+   no screen.
-   to exist.
+   Gameplay and description can be found on the patent fill (it's a traditional Spanish game, it's
+   easy to find more info about how to play it):
+     https://worldwide.espacenet.com/patent/search/family/008268025/publication/ES1014799U?q=pn%3DES1014799U
+   Photos and a (partial) manual can be found at: https://www.recreativas.org/la-rana-1051-inder
    It can be played by pressing 5 (insert coin), press 1 (start) for each player, press A (start timer),
    press various keys to score. Don't press X or the game instantly ends. When the timer runs out it
    switches to the next player, or ends.
@@ -29,7 +32,7 @@ Status:
 - All games are playable with sound.
 
 ToDo:
-- The "new cpu" machines are lacking mechanical sounds. The output bits vary per game.
+- The "new CPU" machines are lacking mechanical sounds. The output bits vary per game.
 - La Rana: playable. Needs its own layout. Inputs to be figured out.
 
 ********************************************************************************************************/
@@ -1664,19 +1667,39 @@ ROM_START(ind250cc)
 	ROM_LOAD("e-250cc.bin", 0x30000, 0x10000, CRC(538b3274) SHA1(eb76c41a60199bb94aec4666222e405bbcc33494))
 ROM_END
 
+/*---------------------------------------------------------------------------------------------------------------
+/ Unknown gambling game on Inder pinball hardware.
+/ According to PinMAME dev:
+/ By inspecting the program ROMs, it seems that the game will "spin" several lamps so a pattern emerges.
+/ If a certain pattern appears (a win), two to five tries can be made to increase your win, using three buttons.
+/ You may also wait, not pushing anything, in which case the win stays the same.
+/ If a win is made, some sort of payout starts (probably coins being dispensed).
+/--------------------------------------------------------------------------------------------------------------*/
+ROM_START(indunkgam)
+	ROM_REGION(0x4000, "maincpu", ROMREGION_ERASEFF)
+	ROM_LOAD("0.ci3", 0x0000, 0x2000, CRC(f819d4a4) SHA1(f8f73dadbf9d45af8fa004e92e660a6014c31f68))
+	ROM_LOAD("1.ci4", 0x2000, 0x2000, CRC(31837bed) SHA1(27edb9dec0e0368b5144922bc9e23fc9f69da34b))
+
+	ROM_REGION(0x2000, "audiocpu", ROMREGION_ERASEFF)
+	ROM_LOAD("audiocpu.snd", 0x0000, 0x2000, NO_DUMP)
+
+	ROM_REGION(0x40000, "audiorom", ROMREGION_ERASEFF)
+	ROM_LOAD("audiorom.snd", 0x00000, 0x10000, NO_DUMP)
+ROM_END
+
 } // Anonymous namespace
 
 
-// old cpu board, 6 digits, sn76489
+// old CPU board, 6 digits, sn76489
 GAME(1985,  brvteam,  0, brvteam,  brvteam,  inder_state, empty_init,  ROT0, "Inder", "Brave Team",    MACHINE_MECHANICAL | MACHINE_SUPPORTS_SAVE )
 
-// old cpu board, 7 digits, ay8910
+// old CPU board, 7 digits, ay8910
 GAME(1986,  canasta,  0, canasta,  canasta,  inder_state, empty_init,  ROT0, "Inder", "Canasta '86'",  MACHINE_MECHANICAL | MACHINE_SUPPORTS_SAVE )
 
-// old cpu board, 7 digits, sound cpu with 2x ay8910
+// old CPU board, 7 digits, sound cpu with 2x ay8910
 GAME(1986,  lapbylap, 0, lapbylap, lapbylap, inder_state, empty_init,  ROT0, "Inder", "Lap By Lap",    MACHINE_MECHANICAL | MACHINE_SUPPORTS_SAVE )
 
-// new cpu board, sound board with msm5205
+// new CPU board, sound board with msm5205
 GAME(1987,  pinmoonl, 0, inder,    pinmoonl, inder_state, init_0, ROT0, "Inder",    "Moon Light (Inder)", MACHINE_MECHANICAL | MACHINE_SUPPORTS_SAVE )
 GAME(1988,  pinclown, 0, inder,    pinclown, inder_state, init_1, ROT0, "Inder",    "Clown (Inder)",      MACHINE_MECHANICAL | MACHINE_SUPPORTS_SAVE )
 GAME(1989,  corsario, 0, inder,    corsario, inder_state, init_1, ROT0, "Inder",    "Corsario",           MACHINE_MECHANICAL | MACHINE_SUPPORTS_SAVE )
@@ -1684,3 +1707,6 @@ GAME(1990,  mundial,  0, inder,    mundial,  inder_state, init_1, ROT0, "Inder",
 GAME(1991,  atleta,   0, inder,    atleta,   inder_state, init_1, ROT0, "Inder",    "Atleta",             MACHINE_MECHANICAL | MACHINE_SUPPORTS_SAVE )
 GAME(1991,  larana,   0, inder,    larana,   inder_state, init_0, ROT0, "Inder",    "La Rana",            MACHINE_IS_SKELETON_MECHANICAL | MACHINE_SUPPORTS_SAVE )
 GAME(1992,  ind250cc, 0, inder,    ind250cc, inder_state, init_1, ROT0, "Inder",    "250 CC",             MACHINE_MECHANICAL | MACHINE_SUPPORTS_SAVE )
+
+// Unknown sound hardware, unknown machine (using 'larana' inputs until proper ones are figured out).
+GAME(1991, indunkgam, 0, inder, larana, inder_state, init_0, ROT0, "Inder", "Unknown gambling game on Inder pinball hardware", MACHINE_IS_SKELETON_MECHANICAL | MACHINE_SUPPORTS_SAVE )