06927: cpc464, cpc6128: Hundra gets stuck in a black screen after leaving main menu

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
06927	Crash/Freeze	Major	Always	Apr 2, 2018, 15:12	Mar 20, 2019, 22:56

Tester	StHiryu	View Status	Public	Platform	MAME (Unofficial Binary)
Assigned To	AmatCoder	Resolution	Fixed	OS	Windows Vista/7/8 (64-bit)
Status [?]	Resolved			Driver	amstrad/amstrad.cpp
Version	0.196	Fixed in Version	0.208	Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	06927: cpc464, cpc6128: Hundra gets stuck in a black screen after leaving main menu
Description	After selecting yor controls in the main menu, the game gets stuck in a black screen.
Steps To Reproduce	-Grab any version of Hundra from Cpc.power.com (tape or disk). -Use \|CPM to load the disk image. -Select keyboard or joystick in the menu.
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	cpc464, cpc6128

Attached Files

No.16219 AmatCoder Tester Mar 7, 2019, 15:32	I have created a pull request for this issue: https://github.com/mamedev/mame/pull/4730 This program waits indefinitely until vsync are enabled. But MAME was checking for vsync after increasing line counter so it was never enabled when line=0.
No.16220 StHiryu Tester Mar 7, 2019, 16:12	Big thanks, will test some amstrad and spectrum stuff after your commits.
No.16245 Gryzor1363 Tester Mar 15, 2019, 22:46 edited on: Mar 15, 2019, 22:46	Similar problem with Adios a la Casta 2, which works until after the title screen, then there is only the background music and a blackscreen with seemingly no controls. Should I raise a dedicated ticket for this ? Problem is confirmed up until Mame 0.206.
No.16246 StHiryu Tester Mar 16, 2019, 00:53	Tried Adios a la casta 2.cdt and works great. However Adios a la casta 2 crashes emu when selecting dsk image at file manager.
No.16247 Gryzor1363 Tester Mar 16, 2019, 01:00	It crashes in 0.206 ? I recall it crashed mine too a few versions back but not with 0.206 which I tried before my previous comment. Blackscreen + music after title, confirmed again a moment ago. Tried with the .dsk image.
No.16248 StHiryu Tester Mar 16, 2019, 01:15	As I said, the game is playable in current 208 GIT, but the dsk crashed the emu, so I played the cassete version. I don't have 206 to test, but seems that the issue was the same that Hundra.
No.16249 AmatCoder Tester Mar 16, 2019, 11:17	"Adios a la Casta 2" does not work in 0.206 but it works now. The issue was not the same than "Hundra", but the same than "Profanation 2" fixed here: https://github.com/mamedev/mame/pull/4725 Note: "Adios_a_la_Casta-2-vs-1.0" dsk from: https://www.4mhz.es/adios-a-la-casta-episode-2-de-buen-rollo/ leads a segfault if loaded with internal file manager. It works if loaded via command line (although it aborts at exit). Version "Adios-a-la-casta-2-loader-reprogramado-Joseman-para-4Mhz" from: https://www.4mhz.es/adios-a-la-casta-episode-2-de-buen-rollo/ works fine. Version "Adios A La Casta - Episode 2 v1.0 (UK) (128K) (2016)" from: http://www.cpc-power.com/index.php?page=detail&onglet=dumps&num=13113 works fine.
No.16250 Gryzor1363 Tester Mar 17, 2019, 00:45	Glad to see you killed those two bugs in one go ! Information acknowledged, and thanks for all the great work, AmatCoder. I guess several "contemporary" release use some exotic coding practices not initially taken into account by CPC emulators, MAME/MESS or otherwise. Star Sabre seems to suffer from this in the intro sequence, although it is playable.
No.16256 AmatCoder Tester Mar 20, 2019, 22:56	For the record, with this commit: https://github.com/mamedev/mame/commit/66a4629631b8796896a4dc3bd080399b8531ada0 "Adios_a_la_Casta-2-vs-1.0.dsk" no longer produces a segfault but an error. It is a double-sided image so it needs a double-sided floppy drive. "35ssdd" works but only on drive A (for unknown reasons - most probably another bug...)