NES 2.0 Mapper 256 Submapper Proposal

Discuss emulation of the Nintendo Entertainment System and Famicom.

Moderator: Moderators

Post Reply
NewRisingSun
Posts: 1178
Joined: Thu May 19, 2005 11:30 am

NES 2.0 Mapper 256 Submapper Proposal

Post by NewRisingSun » Mon Jan 22, 2018 3:48 pm

Several VTxx-based plug-and-play consoles use a simple protection scheme intended to prevent interchanging the ROM data between different consoles. The protection scheme works by simply swapping the addresses of the bankswitch registers.

I have made a submapper proposal for mapper 256 to deal with this issue. Test ROM attached.
Attachments
Mapper256-Test.7z
(2.04 KiB) Downloaded 235 times

NewRisingSun
Posts: 1178
Joined: Thu May 19, 2005 11:30 am

Re: NES 2.0 Mapper 256 Submapper Proposal

Post by NewRisingSun » Sat Mar 10, 2018 2:17 am

Since no objections have been raised after almost seven weeks, I am adding the proposal to the main submapper page.

Post Reply