Vendetta (Crime Fighters 2) (Patreon)

Last minute release today, please excuse us for the short  post: we've managed to get Vendetta working in the JTSIMSON core. The  hardware is extremely similar between the two systems, although they are  incompatible. You cannot just swap the ROM chips from one to the other  and get them working. The devices are mapped to different CPU addresses  and there are a couple of hardware changes. For example, Vendetta has a  custom chip to detect sprite collisions (and to make the board harder to  copy) and The Simpsons sports more program memory for the sound  subsystem.

Adding Vendetta has unveiled a problem in the sprite  hardware implementation. So you will find a bomberman visible when he  should not in The Simpsons first stage in this core version.  There might be other strange situations, so please report them so we can  understand the problem better.

Vendetta's config menu is set by the test button, like in The Simpsons. There are no DIP switches in this system.

Other Updates

• Tony Shong, from Gamera games, visited JT headquarters two weeks ago and told us about a bug in Exed Exes. We have fixed it. Remember that you can use GitHub to report bugs and save money on plane tickets
• Kicker graphics problems have been fixed too
• MiST/SiDi beta files should not be missing again in zip files, like last week (sorry about that)

Work on The Fairy Land schematics continues. It  is a big system with a lot of discrete resistors and capacitors in the  sound section, so it is taking us longer than usual to work it through.  Please bear with us.