Odd sized roms [SNES]

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buffaloj0e
Posts: 35
Joined: 29 May 2018 04:28

Odd sized roms [SNES]

Post by buffaloj0e » 26 Dec 2018 01:53

There are a few snes pal roms that are unusual sizes based on byuu’s dumps. These are 2mb smaller then the actual cart dump as byuu’s dumping hardware works in 2mb blocks instead of 4mb like the chips. Is it possible to have both sizes marked as verified to avoid confusion? The games in question (so far) are FIFA 97, Spectre, Worms. I can confirm from dumps that the old checksum match’s the old dump and manual trimming provides byuu’s checksum, so technically both are correct. If a post with checksums is needed please let me know.

KingMike
Posts: 465
Joined: 22 Sep 2012 16:36

Re: Odd sized roms [SNES]

Post by KingMike » 26 Dec 2018 07:08

The difference is that byuu has removed data he has detected as mirroring even when it results in a non-standard size.

I believe byuu doesn't wish to divide mirroring based on economically feasible to produce sizes. (probably nobody will produce a 7-megabit cart since that would require at least 3 chips but 10/12/20/24 were common 2-chip sizes)

hornpipe2
Posts: 13
Joined: 15 Jan 2013 20:45

Re: Odd sized roms [SNES]

Post by hornpipe2 » 26 Dec 2018 07:17

And yet...
viewtopic.php?f=2&t=3122

So what is the No-Intro stance? Is the best rom the "minimum runnable ROM", the "matches what's on the chips", the "minimum power-of-2", the "whatever the emulator devs say", or something else?

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