never tried psx4m,,is it better than psx4all ?
back before preenv games i tried GTA1, yu-gi-oh, resident evil 3, and my top game till now FF7 all with scph1001 worked like ps1
psx4m is based on psx4all so it should be better(but compatible it lower because some speed hacks)
also you can look at this movies or download and decide by yourself
// peteGPU looks to be portable to GLES from GL, if i will have some free time it will be ready in near week