Is an NES bios splash screen possible?

JKeefe56JKeefe56
in The Brewery
I was wondering if it would be possible to make my NES load a BIOS POST splash screen (Like when your computer says the manufacturers name when first booting)?



I could program this in assembly for a game, but wondering if it would be possible to do this as an NES mod?



Just a thought, any suggestions are appreciated.  I know, it'd probably be way more difficult than worthwhile.  But thought I'd throw it out there.

Comments

  • ShiruShiru
    It is possible, has been discussed in details somewhere on NesDev forums, if I remember correctly. Generally it is the same thing as the built-in games in Famiclones, i.e. a ROM that runs if no cartridge is inserted.
  • JKeefe56JKeefe56
    Thanks, I guess I'll head on over there and start digging around.
  • removed04092017removed04092017
    One of the hard parts is deciding if a game is inserted, you can't have two carts/chips running on the bus at the same time. There -really- isn't a good way to fix it, besides maybe buffering and choosing which buffer chip you want running, with the "primary" game cart (BIOS-like cart) picking which data bus that is shown, and modify that when exiting that screen.
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