05240: ddream95, hoops95, hoops96, stadhr96, stadhr96j: [debug] Assertion failed: vpos >= 0, file src\emu\screen.c, line 711

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
05240	Crash/Freeze	Critical (emulator)	Always	Jul 29, 2013, 11:36	Oct 27, 2013, 12:33

Tester	Firewave	View Status	Public	Platform	MAME (Self-compiled)
Assigned To	Kale	Resolution	Fixed	OS
Status [?]	Resolved			Driver	dataeast/deco_mlc.cpp
Version	0.149u1	Fixed in Version	0.151	Build	Debug
		Fixed in Git Commit		Github Pull Request #

Summary	05240: ddream95, hoops95, hoops96, stadhr96, stadhr96j: [debug] Assertion failed: vpos >= 0, file src\emu\screen.c, line 711
Description	Assertion failed: vpos >= 0, file src\emu\screen.c, line 711
Steps To Reproduce
Additional Information
Github Commit

Flags	Debug build specific
Regression Version
Affected Sets / Systems	ddream95, hoops95, hoops96, stadhr96, stadhr96j

Attached Files

No.09877 Osso Moderator Oct 9, 2013, 17:42	Changing 0x14/4 with 0x14/6 (or other values) in m_raster_irq_timer->adjust(m_screen->time_until_pos(m_irq_ram[0x14/4])); avoids the assert, but obviously isn't a fix. Maybe can be a hint for a possible cause and solution, though.
No.09884 Haze Senior Tester Oct 14, 2013, 15:36	the assert is because it attempts to set the raster trigger position to '-1' which probably means 'off' because it will never hit that value. I consider the assert to be the bug, not the setting of the value to -1, which looks entirely intentional by the game code / driver.