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undisbeliever / snesdev-notes

Notes about Super Nintendo development
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FBLANK is a blanking period #10

Open jeffythedragonslayer opened 2 years ago

jeffythedragonslayer commented 2 years ago

This sentence threw me for a loop:

When the force-blank bit is set, the PPU will disable the screen output and allow the CPU to safely access the PPU registers outside the blanking periods.

I think it should probably end in "outside the vertical blanking period" because FBLANK is also a blanking period.

undisbeliever commented 2 years ago

I do not consider force-blank to be a blanking period, it does not have a specific start or end time nor it is a part of the TV sync pulse.

I am using the phrase 'blanking periods' to refer to both the horizontal blanking and vertical blanking periods.

I am undecided as to whether I should change the sentence or not. I'm leaning towards not, as I have seen the phrase 'blanking periods' refer to only the horizontal and vertical blanking periods in the past.

I may add a link to a terminology/glossary page instead. Would that suffice?

jeffythedragonslayer commented 2 years ago

Yes; the sentence just confused me because some of the first snes documentation I read lumped VBLANK, HBLANK, and FBLANK together