05478: mk: Not receiving the full 10,000,000 points after defeating Reptile

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
05478	Gameplay	Minor	Have not tried	Mar 17, 2014, 03:36	Mar 25, 2014, 18:00

Tester	Jason Shearer	View Status	Public	Platform	MAMEUI
Assigned To		Resolution	Bugs That Aren't Bugs	OS	Windows Vista/7/8 (64-bit)
Status [?]	Resolved			Driver	midway/midtunit.cpp
Version	0.152	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	05478: mk: Not receiving the full 10,000,000 points after defeating Reptile
Description	The 10,000,000 points the player is supposed to receive for defeating Reptile are not being added to the player's score correctly.
Steps To Reproduce	How to fight Reptile: * Must be on The Pit stage. * Just before the fight begins, a silhouette must fly past the moon (see details below). This means you have the opportunity to fight Reptile. * Defeat your opponent with a Double Flawless without using Block (this also means you can’t use Kano’s knives or Sub-Zero’s slide). * Finish your opponent with a Fatality (uppercutting your opponent into The Pit does NOT count as a Fatality). Do not use Block in Scorpion’s case — instead, jump up and tap Up twice, timing the second Up as you land; Sonya can fight Reptile as of Revision 4.0. Note that Reptile only appears in Revisions 3.0 and above and must be finished with a Fatality in order to receive the bonus points. A note about moon silhouettes: According to the MK devs, a silhouette will only appear on The Pit stage after every 40 matches of play. The machine has an internal counter that keeps track of how many matches have been played (a match is a complete two- or three-round battle). Once the counter reaches 40, a silhouette will appear the next time a player reaches The Pit, at which time the counter will reset to zero.
Additional Information	Originally found in 0.138. Needs to be tested on real hardware.
Github Commit

Flags
Regression Version
Affected Sets / Systems	mk

Attached Files	before.png (289,255 bytes) Mar 17, 2014, 03:36 Uploaded by Jason Shearer
	after.png (290,892 bytes) Mar 17, 2014, 03:37 Uploaded by Jason Shearer
	1.zip (1,740,014 bytes) Mar 19, 2014, 16:59 Uploaded by Jason Shearer
	MK REPTILE SCORE BUG.txt (1,707 bytes) Mar 25, 2014, 10:52 Uploaded by Phil Bennett Disassembly [Show Content]

No.10364 AWJ Developer Mar 17, 2014, 16:32	I don't see how this can possibly be an emulation error and not a bug in the original game.
No.10365 Jason Shearer Tester Mar 17, 2014, 18:31	I'd love to know for certain. I haven't been able to find anyone performing this on real hardware to confirm, nor can I find any mention of it happening on real hardware. I actually noticed this back in 2010. Figured I'd report it in the hopes that it would give someone an incentive to find out. ;)
No.10366 NekoEd Senior Tester Mar 17, 2014, 18:57 edited on: Mar 17, 2014, 18:59	I'll set this acknowledged while it's looked into. Wonder if this isn't one of those infamous MK red herrings again.... Anyway, thanks for the report. If you could perhaps post a savestate or IMP, that might help. Particularly a save state, given the ridiculous means to achieve this.
No.10368 Osso Moderator Mar 18, 2014, 07:06	Also please use the newest MAME release available, if possible. 0.138 is from 2010, a lot of things may have changed since that time.
No.10369 NekoEd Senior Tester Mar 18, 2014, 18:23	That's true. As of this posting (18 MAR 2014) the current official MAME release is 0.152
No.10373 Jason Shearer Tester Mar 19, 2014, 17:07 edited on: Mar 19, 2014, 19:10	Per your request, I included a save state. It begins once the text for finding Reptile appears. All you have to do is beat him. Make sure you finish him with a Fatality, else you won't get the bonus points (which registers as 2,000,000). I can also confirm that it still occurs on 0.152, which is what I created the save state with.
No.10509 Phil Bennett Developer Mar 25, 2014, 10:52	It's a bug in the original game. See the uploaded text file for a disassembly of the Reptile bonus code. After the first call to award 2,000,000 points, the register holding the winning player number parameter (A1) will have been overwritten with a non-zero value. If you're player 1, the subsequent score updates will erroneously award a total of 8,000,000 points to player 2. It looks like you'll only receive the full 10,000,000 points if you're playing as player 2.
No.10510 NekoEd Senior Tester Mar 25, 2014, 17:12	Looks like this is an original bug. Closing as such. (Closed/BTANB)
No.10511 Jason Shearer Tester Mar 25, 2014, 18:00	You're the man, Phil. There's no disputing that. Thanks for the info.