Corrupted title screen in Zanac(Dahjee)

[litaniast]

According to SMS Power and Sega Retro, correct title screen is

But current Gearsystem(3.7.0) has

(Both standalone Gearsystem and libretro has that corrupted title screen)

[drhelius]

Thanks for reporting. The mapper looks ok. The problem is an invalid interrupt ack at $5C49 that I should investigate in the future.