PS1 got removed, as there still needs to be a LOT of integration work done.
Particularly in regards to:
* Multiple discs
* Memory card support
* Whether PCSXR or MESS can adequately handle the job.
I was using PCSXR for a while, but now that I have a NUC in the den, the Intel chip in the NUC doesn't work with PCSXR, very well...
There are a lot of weird things to work out, because when you get into systems that need GPU accelleration, the # of configurable parameters to make things just work on every piece of hardware just increased by several orders of magnitude...
but it will get worked out at some point, unless somebody actually wants to dig into the code and help