[Guardian Heroes]: Black Screen of Death Switching Option <-> Main Menu

[nekrondev]

BIOS: Hi-Saturn 1.0.2
Core version: v250113 (latest release as of writing)
H/W: Mister Pi Single Ram

Description:
Repeated switching between options screen and game main menu crashes the core with a black screen of death.
You can reproduce the issue non-deterministic by:

• select "Options" from the main menu
• press start button
• the Options menu will be shown
• press start button
• the main menu will be shown
• repeat the steps multiple times until the black screen of death

[Kuba-J]

@nekrondev please try this core

Saturn_20250117.zip

unzip before use

[Kuba-J]

Ok I am able to reproduce it with single sdram after some time. With core dual sdram it works fine.

[Zet-sensei]

Try it with the Fast timings option ON.

I could barely crash it after 14-15 times quickly repeated.

That needs a verification on the real system, maybe even an original bug from the game.

[nekrondev]

@Zet-sensei @Kuba-J Thank you guys for verifying the bug! To give you some more context why on earth I did that crazy options menu loop is that I accidentally let the game running with the intro/demo loop and went off for dinner. After I returned I found the core crashed with a black screen. I repeated that "dinner loop" a few times and found the core crashing after a while (30 - 60 mins). I somehow had the feeling that switching between screens could be the reason so I thought of a way how to do this faster than having a dinner. I came up with the idea of doing that options loop which non-deterministically crashed the core after multiple screen refreshes.

However, I totally agree that this is a real minor issue but wanted to let you know. Grandia's texture flickering is annoying me more on single RAM that this one.