07669: citybomb: BAD rams after soft reset

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
07669	Crash/Freeze	Major	Always	Jun 2, 2020, 08:08	Jun 2, 2020, 13:43

Tester	danylopez123	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	No change required	OS	Windows 10 (64-bit)
Status [?]	Closed			Driver	konami/nemesis.cpp
Version	0.221	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	07669: citybomb: BAD rams after soft reset
Description	City Bomber works fine when you start it up like normal. However, doing a soft reset after the Ram/Rom check and the grid screen will cause to have a delayed soft reset causing to put the screen white still going for a bit with sounds and then end up doing a soft reset causing to get BAD rams, the how many BAD rams you get its different depending of what you were doing, like if you were at the title screen or during gameplay. While this is happening, the game will prevent to startup again, either close the game and re-launch it or do a Hard Reset. Posted 2 pictures in 1, The Left one (1st) its what i got when i did the soft reset during gameplay and the Right one (2nd) its when i did another soft reset after the 1st BAD rams. A similar thing happens with what i reported for Salamander: https://mametesters.org/view.php?id=7670
Steps To Reproduce	1. Launch the game. 2. Wait for the Ram/Rom check and Grid screen to Finish. 3. Soft Reset the game. 4. BAD Rams will happen preventing from starting up.
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	citybomb

Attached Files	citybomb.png (35,807 bytes) Jun 2, 2020, 08:08 Uploaded by danylopez123

No.17700 hap Developer Jun 2, 2020, 10:06	MAME does not zerofill/initialize everything at soft reset, in fact it would be wrong to do so with devices such as CPUs that have a reset pin. IMO a bug happening after soft-reset when the pcb itself does not have a reset button is not a MAME bug unless it crashes MAME. Solution here: press Shift+F3 to reboot the game.
No.17701 Tafoid Administrator Jun 2, 2020, 13:38	Correct. Soft Resets are not guaranteed. As per reporting rules @ https://mametesters.org/rules.html Reset and Pause bugs are not bugs unless they crash (Noted by Aaron) Reset and pause functionality are both not game player oriented. This is by design. Most PCBs don't have a reset button, and even if they do, the reset behavior is undefined. It is the equivalent of the watchdog firing on a PCB. Some games behave well when this happens; others not so well. The pause functionality in MAME is there for developers to be able to tweak with game parameters during a pause to affect the video. Thus, the video is going to be odd or messed up in a lot of cases. Therefore, closing report.

No.17700

hap

Developer

Jun 2, 2020, 10:06

MAME does not zerofill/initialize everything at soft reset, in fact it would be wrong to do so with devices such as CPUs that have a reset pin.
IMO a bug happening after soft-reset when the pcb itself does not have a reset button is not a MAME bug unless it crashes MAME.

Solution here: press Shift+F3 to reboot the game.

No.17701

Tafoid

Administrator

Jun 2, 2020, 13:38

Correct. Soft Resets are not guaranteed.

As per reporting rules @ https://mametesters.org/rules.html

Reset and Pause bugs are not bugs unless they crash (Noted by Aaron)
Reset and pause functionality are both not game player oriented. This is by design.
Most PCBs don't have a reset button, and even if they do, the reset behavior is undefined. It is the equivalent of the watchdog firing on a PCB. Some games behave well when this happens; others not so well.
The pause functionality in MAME is there for developers to be able to tweak with game parameters during a pause to affect the video. Thus, the video is going to be odd or messed up in a lot of cases.

Therefore, closing report.