02143: ozmawars, ozmawars2, solfight, spaceph: Streaks and dashes appear on screen after playing awhile

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
02143	Graphics	Minor	Always	Aug 22, 2008, 02:28	Aug 24, 2008, 04:07

Tester	Robbbert	View Status	Public	Platform	MAME (Self-compiled)
Assigned To		Resolution	Fixed	OS
Status [?]	Resolved			Driver	midw8080/8080bw.cpp
Version	0.127	Fixed in Version	0.127u1	Build	Normal
		Fixed in Git Commit		Github Pull Request #

Summary	02143: ozmawars, ozmawars2, solfight, spaceph: Streaks and dashes appear on screen after playing awhile
Description	Streaks and dashes appear on screen after playing awhile. When the small rolling balls appear, so do lots of dashes and other corruptions. Didn't happen in 0.126 Also noticed get 2 credits when should only get 1. This one is probably too trivial to worry about. Tafoid: Created new bug for this.
Steps To Reproduce	Play game until small balls appear
Additional Information
Github Commit

Flags
Regression Version	0.127
Affected Sets / Systems	ozmawars, ozmawars2, solfight, spaceph

Attached Files	ozmawars.png (1,653 bytes) Aug 22, 2008, 02:28

No.02164 etabeta Developer Aug 22, 2008, 07:16	The fix I submitted for 02144 seems to fix this issue as well, but I'm not good at these games and I'd like to have a confirmation before marking the bug as solved. The proposed fix consists of simply adding in INPUT_PORTS_START( ozmawars ) (src/mame/drivers/8080bw.c line 1170) the following lines PORT_MODIFY("IN2") PORT_BIT( 0xff, IP_ACTIVE_HIGH, IPT_UNUSED ) after the PORT_INCLUDE line
No.02170 Robbbert Senior Tester Aug 22, 2008, 11:14	Tested ozmawars, it now works fine. Good fix!
No.02196 etabeta Developer Aug 24, 2008, 04:07	It was not the right fix, however. Further tests showed that the real fix to these and other unreported regressions in invaders clones since 0.126u5/0.127 [1] consists in changing the "DSW0" tag to "IN2", so that invaders_map works as expected. The fix has been submitted to MAMEdev, so I'm going to close this bug. [1] e.g. since 0.127 spaceatt, spaceat2 and sinvzan don't start because tilted (thanks LastNinja2 for pointing this out), since 0.126u5 dips were not correctly read by space invaders clones etc...