/vr/ - Retro Games

Anonymous Mon Mar 14 02:28:27 2016 No.3063750 [View]
File: 3 KB, 256x232, legend-of-zelda-nes-ingame-41383.png [View same] [iqdb] [saucenao] [google]

>>3063707
>The IRQ on the Famicom is not normally triggered by anything on the main system board

This is incorrect. In fact an IRQ is triggered when the PPU renders Sprite #0 on the screen which is extensively used in non-MMC3 games for split scrolling, except it requires you to give up the use of that sprite.

The bomb graphic on the status bar is actually Sprite 0 which is used to generate the screen split here.

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