David Haywood’s MAME(tm) WIP

machine/konamigx.c is quite possibly the most horrible piece of code you’ll ever have to look at.

Thankfully despite that, I’ve worked with Kale on making some more improvements to Soccer Superstars, which render it pretty much playable. There are some remaining issues such as Roz layer source clipping not being implemented, and some overly aggressive clipping on the main tilemaps which is causing the right hand side of the screen to be cut off. (Mainly because this runs at a resolution of 576 x 224 and there is a bunch of code in KonamiGX which assumes the maximum resolution will be no more than 384 otherwise buffer overflow, and all hell happens ;-)

It’s also meant to support dual screen output, but Konami’s output multiplexer isn’t really understood, so for now it’s a single screen game. (Run & Gun suffers from the same issue)

I’ve decided to take a look at Soccer Superstars from Konami.

It’s a ‘type3′ GX game, which has an extra ROZ layer, trying to hook anything up into the driver is a bit of a nightmare tho. For now I’ve removed the existing (incorrect) ROZ handling, and added my own. These shots show the ROZ.

The game has quite an odd look to it, with the pitch rotating and the crowd always appearing camera facing in a ‘billboarded’ way, that’s how it’s meant to be tho! I don’t know if the game is protected or not, if it is then sprites may prove to be a problem in addition to getting the GX driver to behave and mix this in properly without exploding ;-)