02212: bzone: vector drawing corruption when using a save state

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
02212	Save/Restore	Minor	Always	Sep 7, 2008, 17:22	Feb 21, 2009, 20:36

Tester	rhurst	View Status	Public	Platform	MAME (Official Binary)
Assigned To	couriersud	Resolution	Fixed	OS	Windows XP/Vista 64-bit
Status [?]	Resolved			Driver	atari/bzone.cpp
Version	0.127	Fixed in Version	0.129u5	Build	I686
		Fixed in Git Commit		Github Pull Request #

Summary	02212: bzone: vector drawing corruption when using a save state
Description	Game plays, just a variety of vector lines draw off-screen when using a valid save state.
Steps To Reproduce	Works fine after deleting sta/bzone folder and running Battle Zone. Launching a 2nd time, and when state successfully loads, vector line-drawing goes jittery.
Additional Information	I also tested in a separate directory under Linux using sdlmame 0.127, and it exhibits the exact same behavior upon re-using a save state. Works fine when it is deleted.
Github Commit

Flags
Regression Version
Affected Sets / Systems	bzone

Attached Files

No.02411 etabeta Developer Sep 8, 2008, 18:29	could this be related to the change of avg_done in a custom_input (even if it would have been present also before 0.127, in this case)? I thought that since avg->sync_halt was already saved there would have been no problems...
No.03002 rhurst Tester Nov 6, 2008, 18:31	Tested again on .128 and still fails. The same behavior occurs with redbaron, another Atari vector game, possibly related to same bug.
No.03766 couriersud Developer Feb 20, 2009, 23:33	This seems to be a general timing issue. When load ing a save state, the screen is only update half as often as with a fresh start. More specifically, with a save state, I have to press 5x Shift-P in Pause Mode to get an update, whereas after a fresh start it is 2x to 3x. Loading a save state does not exhibit the issue at all.