Note which options are not used by licensed games

[daid]

So both ROM developers know that they shouldn't use those options, and Emulator developers know that there isn't a "correct" way to implement these options.

[avivace]

Looks pretty good to me, just the licence -> license spelling

[TheThief]

I prefer the term "production cartridges" (or just "cartridges"). Various third-party cartridges were released that weren't officially licensed games.

Also, not every cartridge was a game.

[daid]

I prefer the term "production cartridges" (or just "cartridges"). Various third-party cartridges were released that weren't officially licensed games.

Also, not every cartridge was a game.

Small issue with that, the cartridge list says there is 1 with the 2kb sram option, but it is marked as unlicensed. I haven't checked if this is actually a cart that was produced.

[CasualPokePlayer]

I prefer the term "production cartridges" (or just "cartridges"). Various third-party cartridges were released that weren't officially licensed games.
Also, not every cartridge was a game.

Small issue with that, the cartridge list says there is 1 with the 2kb sram option, but it is marked as unlicensed. I haven't checked if this is actually a cart that was produced.

The cartridge list also has various ROM hacks, and it's probably unlikely all of them actually produce cartridges of these hacks.

[daid]

Of the 9438 roms I could find, only 102 use the 2KB ram option. All of those are (PD) or (Unl), and a few are marked as bad dumps. And 15 roms use values > 0x05 for the RAM field.

None of the 9438 roms use ROM+RAM or ROM+RAM+BATTERY.

None of the 9438 roms use ROM size $52, $53 or $54. And there are only 5 roms which have out of range values which are all (Unl)

And, I found zero roms that have the CGB flag sets for "PGB mode" which is currently mentioned in the pandocs as "TODO + Research"

[ISSOtm]

PGB mode was confirmed by @LIJI32, so it's definitely real.

If 2K cannot be confirmed, then I suggest again "Unused, *) but unofficial docs list it as 2 KB".

Once that is done, unless @avivace has other opposition, this should be merged.

[LIJI32]

PGB mode probably can't even be used in plain ROMs because it seems to require very dedicated hardware in the cartridge instead of a plain ROM+MBC.

[avivace]

LGTM, thanks everybody.

Can we add the unconfirmed/unused note on the 2 KB thingy?

[ISSOtm]

Ping @daid

[daid]

Sorry, it slipped my notification list. So thanks for the ping.

I've also marked the rom sizes > $50 as unofficial. As zero roms in my giant rom set use this option, and there is no documentation to backup this claim, and it doesn't really make sense to have those sizes of rom.

My guess it that it was used by someone in an attempt to "fix" certain bad dumps or something, where they didn't understand the MBC and thus got a strange number of banks.

[TheThief]

I would remove the >$50 sizes from the table and put a note underneath that other docs mention them but the source is unknown and no known ROMs use them.

I had this in my other pull request:

The following ROM types are listed on some older unofficial documentation but the source is unknown, and no cartridges or ROMs using them are known.

|code | Size      | Banks |
|-----|-----------|--------------|
| $52 | 1.1 MByte | 72 banks |
| $53 | 1.2 MByte | 80 banks |
| $54 | 1.5 MByte | 96 banks |

[avivace]

This looks good to me, but @TheThief solution also makes sense and maybe this could set a precedent (keep unconfirmed stuff separate)

[daid]

While TheThiefs solution works really well for tge rom size, I would preferrer keeping a table sorted over 2 tables.