Captain Saver gfx glitches

[akeley]

I've tried a couple of solid roms for this game (from No-Intro & MiSTer packs) and while the game itself plays ok, the bottom info area (below gameplay window) is all jumbled up. It works ok in an emulator. The US version is called Power Blade 2 and is also fine.

I don't have much experience with NES, just curious if it's something normal?

[MostroW]

Does your current rom validate / match the nes2.0 database?

[akeley]

No idea, like I said I'm a casual console user. Does this game work ok for you?

[MostroW]

Captain saver played fine for me, the bottom part of the screen where the player info is displayed is also correct.

[Sarge]

I have a ROM that did the same thing - I think it's either from an older No-Intro or EverDrive pack. Check out the one in a newer EverDrive pack. CRC32 is FC97FC14 for the one that works for me.

[akeley]

OK, thank you. I thought last year's N8 pack should be ok...I'll get the new one.

[Sarge]

I think it is - I just grabbed the single file in the 2020-04-16 set from the usual source and it seems to work fine.

[akeley]

It's odd, my set was named "NES - EverDrive N8 2020-06-03", most likely from the same place, and it has the glitchy one. I grabbed the latest and it works fine though.

What is this whole "headered" business anyway? It seems to be a relatively recent thing...

[MostroW]

What is this whole "headered" business anyway? It seems to be a relatively recent thing...

Quoted from wikipedia, but i've read this back on multiple sites:

Marat Fayzullin's iNES (also known as interNES in early versions) is the first (or at least one of the first) emulators to use NES header format (also known as iNES format). The release date of the first version is 1996 according to its site.

And in the years after that the structure of the header bytes have been altered slightly to accomodate for other things discovered.

I guess if we didn't use header then the program rom and character rom would probably be two separate files? (like bsnes / higan does?)

[Sarge]

Headers contain a fair amount of info, but the most important is that it identifies which mapper chip the game uses, since the mapper isn't part of the ROM dump.