You could get the equivalent of hblank interrupts with a mapper, such as the mmc3 used in Super Mario Bros 3. That is how SMB3 renders its hud. https://en.wiki

You could get the equivalent of hblank interrupts with a mapper, such as the mmc3 used in Super Mario Bros 3. That is how SMB3 renders its hud. https://en.wikipedia.org/wiki/Memory_management_controller#MMC3 https://en.wikipedia.org/wiki/Memory_management_controller#M...