RPCS3 PC PS3 Emulator before, and today @zecoxao and @PixelButts let us know on Twitter that developer @AlexAltea (Twitter) who previously shared a PS3 RSX VRAM / IO Access Exploit no longer has time to update the Nucleus PC PS3 / PS4 Emulator so if anyone is interested in taking on the challenge here's your chance!
Download: nucleus-master.zip / GIT
Running/debugging PS4 1.76 kernel (with symbols!) on PC with qemu+gdb. Final goal will be full system-emulation.
Although there isn't much available yet, another PlayStation 4 emulator in development from Abaska is DCS4 for those keeping track.
Season's greetings to both @Nesterwork and @Chaos Kid for the heads-up in the PSXHAX Shoutbox on the news.