05784: vectrex: Some games experience moderate to heavy in-game corruption when there is a lot of 'activity' present.

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
05784	Graphics	Major	Always	Nov 30, 2014, 11:42	Dec 6, 2014, 23:22

Tester	trebor	View Status	Public	Platform	MESS (Official Binary)
Assigned To		Resolution	Open	OS	Windows Vista/7/8 (64-bit)
Status [?]	Confirmed			Driver	miltonbradley/vectrex.cpp
Version	0.156	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	05784: vectrex: Some games experience moderate to heavy in-game corruption when there is a lot of 'activity' present.
Description	Some games experience moderate to heavy in-game corruption when there is a lot of 'activity' present. Two most outstanding examples are Mine Storm (II/3D) and Berzerk. For Mine Storm the corruption can be encountered as early as the second level [Mine Field 2]. Berzerk experiences worst corruption with even the player's score impacted on higher levels with more robots and heavy shooting present. Corruption ranges from unplayable for a few to several seconds through complete game hung or loop running within the background with or without additional corruption - There is a great and continuous amount of screen flickering during the corruption as well.
Steps To Reproduce	Load either Mine Storm or Berzerk and play a gaming session. Mine Storm experience corruption as early as Mine Field 2. Berzerk typically experiences corruption after several rounds of playing.
Additional Information	Other games with a significant amount of on-screen action (Such as Star Trek) plays without issue. Berzerk MNG recorded session attached. Mine Storm can also be provided if needed.
Github Commit

Flags
Regression Version
Affected Sets / Systems	vectrex

Attached Files	0001 [Berzerk].zip (10,495,261 bytes) Nov 30, 2014, 11:42 Uploaded by trebor MNG recorded file for Berzerk with MESS 0.156
Attached Files	5.zip (7,807 bytes) Dec 6, 2014, 23:21 Uploaded by B2K24 MESS 0.156 vectrex Mine Storm

No.11277 B2K24 Senior Tester Dec 3, 2014, 15:18	I'm really bad at playing the 2 games listed in this report. I'm hoping to put in time this weekend to get a bit better, so I can give this one a serious look.
No.11280 B2K24 Senior Tester Dec 6, 2014, 23:20	This is a most interesting bug that seems to trigger completely at random with no real way of setting it up. I was able to repo the behavior in this report playing Mine Storm by shooting and using turbo in rapid succession. What happens here is the game seems to freeze while what's on the screen blinks 3 or 4 times and then game play resumes as if nothing out of the ordinary has happened. Even though save states are not officially supported for this system, I'm able to save and load states to demonstrate this reported behavior. I'll attach Mine Storm save state at position 5 right as this behavior is triggered.

No.11277

B2K24

Senior Tester

Dec 3, 2014, 15:18

I'm really bad at playing the 2 games listed in this report. I'm hoping to put in time this weekend to get a bit better, so I can give this one a serious look.

No.11280

B2K24

Senior Tester

Dec 6, 2014, 23:20

This is a most interesting bug that seems to trigger completely at random with no real way of setting it up. I was able to repo the behavior in this report playing Mine Storm by shooting and using turbo in rapid succession.

What happens here is the game seems to freeze while what's on the screen blinks 3 or 4 times and then game play resumes as if nothing out of the ordinary has happened.

Even though save states are not officially supported for this system, I'm able to save and load states to demonstrate this reported behavior.

I'll attach Mine Storm save state at position 5 right as this behavior is triggered.