Feature request: MSXBAS2ROM MegaROMs must be detected as Konami SCC ROM format

[amaurycarvalho]

MSXBAS2ROM uses "KonamiSCC" ROM format when compiling a MSX-BASIC program in MegaROM size (+128kb).

You can identify a MegaROM file as a MSXBAS2ROM compiled one if you find a "MSXB2R" signature string at 0x000A or 0x400A position.

So, when the file size is >=128kb and the ROM contains the "MSXB2R" signature string, the correct cartridge type to choose is "KonamiSCC".

You can download a MegaROM example here.

[NullPointerReference]

@amaurycarvalho Most ROMs are detected by their ROMDB signature; you can submit any unknown ROM to: https://romdb.vampier.net/checkrom.php ... or through a ROM-type hint in the file-name; like: " gd2 [KonamiSCC].rom". That way all emulators (over time) will support them correctly.

PS: I suggest this as 'work arounds'; not a long time solution, but the current ROM-type fingerprinting of WebMSX is pretty basic. Looking at the WebMSX 'auto-detect' code I - as a noob - don't see a quick way to implement your hints without having to refactor much of the current 'ROM format priorities' code. Aka, although your hints are pretty basic, it might require more code-plumbing than one might expect to get this into the current version.

[amaurycarvalho]

Thank you for your reply.

I decided to add the ROM-type hint suffix into the file-name, just like you suggested.

So, problem solved.

[ppeccin]

I could maybe add the MSXBR2 detection to the mechanism...