SCC don´t work in SCC Games.

Additionnal info for users of openMSX / pseudoMSX :

This rom (renamed NEMESCCP.ROM) can be loaded by creating a DSK file with the following files : MSXDOS.SYS - COMMAND.COM - ROMLOAD.COM - NEMESCCP.ROM - AUTOEXEC.BAT and by inserting a SCC-I cartridge in a slot

The AUTOEXEC.BAT file needs to contain this command :

romload /5 /s nemesccp.rom

There is always a solution, even when developers of emulators don't want to add direct support !

See page 1 of this thread: in short, these rom images are hacked and do not exist in real hardware; openMSX doesn't emulate fictional hardware. (You can't emulate what does not exist.)

Did you manually select the mapper type to Konami SCC?
There are many SCC ROMs created with the games from the disks "Konami Game Collection" that have been badly converted, and yet most of them work on several emulators when they should not.

In fact, this hardware exists in real because we can load a SCC+ ROM in the Konami Sound Cartridge and run it as a ROM cartridge SCC+. And several emulators can also run directly these ROM files because it is more convenient. It's strange that OpenMSX can not do it.

In addition, "It doesn't exist in real hardware" is not a valid reason because in this case, why does not OpenMSX have not an interface adapted to the real hardware? The UI does not fit the cartridge slots of many emulated MSXs. Worse still, often we can not put the cartridge or the slot-expander of our choice in the slots corresponding to the real hardware. However cartridge slots are the basis of MSXs.