Implemented composite vblank irq fix for #7 from akumanatt.

fvdhoef / vera-module

Versatile Embedded Retro Adapter

MIT License

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Implemented composite vblank irq fix for #7 from akumanatt. #22

Closed jburks closed 2 years ago

jburks commented 2 years ago

Fix for #7. VBLANK interrupts were missed for even frames in interlaced mode. This caused timing issues in several games and demos, and severely affected the X16 port of Super Mario Bros:

IMG_20220925_120644005

These artifacts were resolved after VERA was updating with this fix.