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Coco loco (set 3): Added technical notes about the code analysis.

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The program is bitrotten and needs a redump. Added a little patch
for testing purposes. [Roberto Fresca]
This commit is contained in:
RobertoFresca 2016-03-25 23:33:31 -03:00
parent ea7c12ce96
commit deb8df74fc
1 changed files with 38 additions and 10 deletions
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48
src/mame/drivers/cocoloco.cpp
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@ -161,13 +161,15 @@
The third set is resetting after drawing the maze, and when start a game. The third set is resetting after drawing the maze, and when start a game.
The attract one: Attract reset:
bp D28E (this is after all the jsr tables that draw the maze) bp d28e (this is after all the jsr tables that draw the maze)
$D296: jsr $E0CD... $d296: jsr $e0cd...
$E189 (jsr $6337) ; $6337 ---> Goes nowhere. Hit the 00's (BRK) and reset. $e189 (jsr $6337) ; $6337 ---> Goes nowhere. Hit the 00's (BRK) and reset.
Maybe should be jsr $E337 (MSB active)? There, there is a subroutina that has sense. Start reset:
$e0e9: 4c ee 60 ; jmp $60ee <--- nothing here.
*************************************************************************************** ***************************************************************************************
@ -220,6 +222,8 @@ public:
DECLARE_INPUT_CHANGED_MEMBER(coin_inserted); DECLARE_INPUT_CHANGED_MEMBER(coin_inserted);
DECLARE_DRIVER_INIT(cocob);
virtual void video_start() override; virtual void video_start() override;
DECLARE_PALETTE_INIT(cocoloco); DECLARE_PALETTE_INIT(cocoloco);
@ -582,11 +586,17 @@ ROM_START( cocolocoa )
ROM_LOAD( "tbp28l22.bin", 0x0000, 0x0100, CRC(3bf3ccb0) SHA1(d61d19d38045f42a9adecf295e479fee239bed48) ) // same decode prom from abattle (astrof.cpp) ROM_LOAD( "tbp28l22.bin", 0x0000, 0x0100, CRC(3bf3ccb0) SHA1(d61d19d38045f42a9adecf295e479fee239bed48) ) // same decode prom from abattle (astrof.cpp)
ROM_END ROM_END
/* This Petaco's 2-player game
seems to soffer of some bitrot.
The code executes subroutines located out of the ROM space.
Finally jumps to nowhere.
*/
ROM_START( cocolocob ) ROM_START( cocolocob )
ROM_REGION( 0x10000, "maincpu", 0 ) ROM_REGION( 0x10000, "maincpu", 0 )
ROM_LOAD( "b1.bin", 0xd000, 0x0800, CRC(5ead42c4) SHA1(f2b8bf48f80c99c8c109ec67cdd6e1105f7f9702) ) ROM_LOAD( "b1.bin", 0xd000, 0x0800, CRC(5ead42c4) SHA1(f2b8bf48f80c99c8c109ec67cdd6e1105f7f9702) )
ROM_LOAD( "b-c1.bin", 0xd800, 0x0800, CRC(104db6b3) SHA1(d0a9ce1b920124078f442bdcb226e8da9f96d60a) ) ROM_LOAD( "b-c1.bin", 0xd800, 0x0800, CRC(104db6b3) SHA1(d0a9ce1b920124078f442bdcb226e8da9f96d60a) )
ROM_LOAD( "c1.bin", 0xe000, 0x0800, CRC(8774b1bc) SHA1(b7c09883c136dedfffd0724b49cc5ff987831850) ) ROM_LOAD( "c1.bin", 0xe000, 0x0800, BAD_DUMP CRC(8774b1bc) SHA1(b7c09883c136dedfffd0724b49cc5ff987831850) )
ROM_LOAD( "d1.bin", 0xe800, 0x0800, CRC(41b22627) SHA1(241659448074e5101ca7da3feb4a0a38580b12e9) ) ROM_LOAD( "d1.bin", 0xe800, 0x0800, CRC(41b22627) SHA1(241659448074e5101ca7da3feb4a0a38580b12e9) )
ROM_LOAD( "d-e1.bin", 0xf000, 0x0800, CRC(db93f941) SHA1(b827341e408b5dc50acdfd3586f829f7bb2bb915) ) ROM_LOAD( "d-e1.bin", 0xf000, 0x0800, CRC(db93f941) SHA1(b827341e408b5dc50acdfd3586f829f7bb2bb915) )
ROM_LOAD( "e1.bin", 0xf800, 0x0800, CRC(4e5705f0) SHA1(271d6c8eff331327dc1a75f7a4b0c64d3e363e3d) ) ROM_LOAD( "e1.bin", 0xf800, 0x0800, CRC(4e5705f0) SHA1(271d6c8eff331327dc1a75f7a4b0c64d3e363e3d) )
@ -596,11 +606,29 @@ ROM_START( cocolocob )
ROM_END ROM_END
/***********************************
* Driver Init *
***********************************/
DRIVER_INIT_MEMBER(cocoloco_state, cocob)
{
// Just for testing...
UINT8 *rom = memregion("maincpu")->base();
rom[0xe18b] = rom[0xe18b] ^ 0x80; // with jsr $e337, the character doesn't turn and eat straight (maze included)
rom[0xe049] = 0xea;
rom[0xe04a] = 0xea;
rom[0xe04b] = 0xea;
}
/*********************************** /***********************************
* Game Drivers * * Game Drivers *
***********************************/ ***********************************/
/* YEAR NAME PARENT MACHINE INPUT STATE INIT ROT COMPANY FULLNAME FLAGS */ /* YEAR NAME PARENT MACHINE INPUT STATE INIT ROT COMPANY FULLNAME FLAGS */
GAME( 198?, cocoloco, 0, cocoloco, cocoloco, driver_device, 0, ROT90, "Petaco S.A.", "Coco Loco (set 1)", MACHINE_SUPPORTS_SAVE ) GAME( 198?, cocoloco, 0, cocoloco, cocoloco, driver_device, 0, ROT90, "Petaco S.A.", "Coco Loco (set 1)", MACHINE_SUPPORTS_SAVE )
GAME( 198?, cocolocoa, cocoloco, cocoloco, cocolocoa, driver_device, 0, ROT90, "Recel S.A.", "Coco Loco (set 2)", MACHINE_SUPPORTS_SAVE ) GAME( 198?, cocolocoa, cocoloco, cocoloco, cocolocoa, driver_device, 0, ROT90, "Recel S.A.", "Coco Loco (set 2)", MACHINE_SUPPORTS_SAVE )
GAME( 198?, cocolocob, cocoloco, cocoloco, cocoloco, driver_device, 0, ROT90, "Petaco S.A.", "Coco Loco (set 3)", MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE ) GAME( 198?, cocolocob, cocoloco, cocoloco, cocoloco, cocoloco_state, cocob, ROT90, "Petaco S.A.", "Coco Loco (set 3)", MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE )