[msla]

Is it a 6502 processor model in specific? Because the NES used the 2A03 in NTSC regions:

https://www.nesdev.org/wiki/2A03

[0d0a]

I think it's closer to the 2A03. Unless I missed something, there isn't any support implemented for binary-coded decimal mode.

[djmips]

The 2A03 and 2A07 contain exact gate level copies of the 6502 with the binary coded decimal (BCD) logic disabled.