SFROM compatibility

This is an archive of a topic from NESdev BBS, taken in mid-October 2019 before a server upgrade.
View original topic
SFROM compatibility
by on (#132532)
Hello there,
Had a question about a game that uses an SFROM board, 128PRG, 32CHR Mask Roms

I like the INL Flash boards and yet he doesn't have this type listed I was looking for something compatible and just need a little clarification, If I were to use SLROM w/ 128PRG & 128CHR would this work as the 128 is obviously larger than the 32? Or anyway to pad it?

Thanks for your help!
Re: SFROM compatibility
by on (#132541)
If you duplicate the CHR ROM data to full the chip, you can use the SLROM board.
Re: SFROM compatibility
by on (#132545)
So Something like this dos command?
C:\Roms>copy /b NESrom.chr + NESrom.chr + NESrom.chr + NESrom.chr NESromFinal.chr

That I guess was my idea of padding it.

I appreciate the response!

Thanks
Re: SFROM compatibility
by on (#132549)
That will do just fine. In general, this sort of thing has you starting at the last filled power-of-2 boundary, and concatenating a duplicate, then moving on and doing the same until you've filled the target space.