Radiant Silvergun (Japan) // Junk on screen after dying and running a second gameplay, or letting the Attract mode running multiple times

[Zet-sensei]

A user on Discord (cavenoire) informed us about an issu with the game on the unstable 2024-12-12 core version.

If we let the game on the Attract mode for more than 2 times, the normal gameplay afte that will be full of junk pixels.

Happens also when you have played a first time on the game, died completely during it (GAME OVER) and want to run a second gameplay just after that.

Visible on the Stage 3A, just after the end of the introduction.

[Zet-sensei]

We have a note on a software emulator which have the same behavior.

Temporary graphical glitches at the start of a new game under certain conditions, such as after interrupting the AKA-O battle in the attract mode. Caused due to inaccurate handling of VDP2 RBG0 per-dot coefficient reading from a memory area not configured for that purpose via RDBS

Zakk on Dicord said too : [..] one other consistent behavior is that if you don't game over on the first boss but game over in the 2nd stage, the noise is not there when you start a new game

[Zet-sensei]

Fixed with commit b80bbd6