Astal - Final boss specific attack causing graphics corruption

[demorobruzer]

During the final boss fight of Astal, the graphics glitch out during this specific attack:

This issue occurs on both the US and Japanese version of the game that I tried.

I'm running the game on a MiSTER Pi with single SDRAM.

Would a Dual RAM setup fix this? Thanks!

[Kuba-J]

Hi, on which version of the core did you check ?
Try using the fast timings option
It would be nice if you could send the save

[demorobruzer]

Hi, on which version of the core did you check ? Try using the fast timings option It would be nice if you could send the save

This is on core version 20250113.
I had it on Original timing so I will try to use Fast timing.
Yeah, I have to get the final boss everytime to see the problem. Wish there was an option to load a game at the end lol.

[Kuba-J]

Saturn_20250202.zip please try also the latest core
(unzip before use)

[demorobruzer]

Ok, I'll give it a try on that core. Thanks for the help.

[srg320]

Probably, the problem is related to the last major change in VDP1. Perhaps a sprite with a zero size or a negative height/width.
The second option is the problem in the VDP2 window .

You can check this indirectly by disabling image layers one by one in the debug menu.

[demorobruzer]

I found a level select code which makes testing quicker :)

Updated to the latest core 20250202 and it fixed the problem with the final boss.

However, there is a new problem on the 5th level of the game (The River of Dreams). The whole screen get covered in a fog layer and you can't see anything at all. Disabling "VDP2 RGB0" removes that fog layer.

[Zet-sensei]

The code is complex.

99 Lives Code (first) - In the Option menu press LEFT, RIGHT, LEFT, RIGHT, UP, DOWN, L BUTTON, R BUTTON, START on Controller 2.

Select Stage (second) - Enter 99 Lives code. Return to title screen, press UP, DOWN, LEFT, RIGHT, L BUTTON, R BUTTON, A, Y, C, Z, B, X on Controller 1

[Zet-sensei]

Kuba-J seems to have something to check, with the Gradation calculation function.

[srg320]

Kuba-J seems to have something to check, with the Gradation calculation function.

That's right. I've already fixed it.

[Kuba-J]

Fixed 453e81b