I've been doing a bit of debugging on this one. It seems to use four-screen mode (not documented anywhere and the bit is currently not set in the INES header in the GoodNESs ROMset..). I've been trying to convert it from mapper 99 to mapper 1 (with four-screen set in the header).
However the issues starts here. Is there anything stopping a mapper1 game working with four-screen layout? I haven't tried my code on real hardware but emulators behave
really odd here (Latest FCEUX shows nothing in the Nametables-debug view, it's blank). Nintendulator doesn't seem to support four-screen properly either when the ROM is set to mapper 1 (no issues with mapper 99 however). Is the mirroring-settings in MMC1 conflict with the four-screen layout?
Can anyone shed some light on this?
Thanks.
However the issues starts here. Is there anything stopping a mapper1 game working with four-screen layout? I haven't tried my code on real hardware but emulators behave
really odd here (Latest FCEUX shows nothing in the Nametables-debug view, it's blank). Nintendulator doesn't seem to support four-screen properly either when the ROM is set to mapper 1 (no issues with mapper 99 however). Is the mirroring-settings in MMC1 conflict with the four-screen layout?
Can anyone shed some light on this?
Thanks.