VideoSoftware: Added support for RGB565_Z16 color format. Multisampling and Z Compression aren't supported yet. Because Z Compression isn't supported, it just falls back to a 24 bit z buffer when formats other than ZC_LINEAR are selected. Peach's Castle tries to use ZC_LINEAR (possibly an issue with the default value of the zcontrol register) and has huge z fighting issues when you manually enable AA in the start button menu.