Eliminator Boat Duel cuts off status bar

[FGKey2040]

Eliminator Boat Duel (USA) has a menu frame with time information, health, etc. in MiSTer this appears to be cut off/not drawn for the first chunk of lines:

[FGKey2040]

The issue is not in the PAL ROM - attempting to find an alternate dump of the USA ROM

[FGKey2040]

I ran the kitrinx python script to fix headers - issue persists and might also include horizontal alignment issues

[paulb-nl]

Those are sprites in the bottom bar. This game disables rendering from line 209-215 to DMA into OAM.

The missing first line of the sprites is caused by the n_ovr signal in OAMEval. This signal blocks sprite evaluation and is still high when rendering is disabled. It is only cleared on cycle 337 if rendering is enabled.

Rendering is enabled on line 215 before cycle 64 when sprite evaluation begins but because n_ovr is still high until cycle 337 sprite evaluation will not happen on that line.

[FGKey2040]

Thanks for the info - is the behavior you describe an issue with the implementation in the MiSTer core?

[paulb-nl]

Yes it is an issue in the core.

[FGKey2040]

Thanks for the explanation!