[NES II] Fix bottom line clearing during screen scroll

JMarlin / nesii

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[NES II] Fix bottom line clearing during screen scroll #11

Closed JMarlin closed 2 months ago

JMarlin commented 3 months ago

Description

When scrolling the screen, the NES II BIOS routines currently display a dirty previous line at the very bottom margin of the screen. I don't want that.

Acceptance criteria

[x] No dirty line at the bottom of the NOS console

JMarlin commented 2 months ago

Issue was basically because I had tried to add a bottom margin to the screen at some point, which would involve doing a bunch of work to either clear the 'top' line of the screen before scrolling or checking to see if we need to wrap before erasing the very bottom line.

Went the lazy route and just got rid of the bottom margin.