The PS/1 model 2011 emulator seems to function properly now. I had to fix a couple of strange bugs in the Bochs’ code (but I’m not confident enough to submit patches).
Now it boots without errors, the mouse driven interface is working correctly and it’s even able to launch some games.
No HDD or audio yet though, and the usability is almost nil (no gui).
I’ve been playing with a shader lately, namely the Timothy Lottes’ CGA monitor shader. It is promising, but it definitely needs some tweaking.