PCem is an emulator that let's you control the CPU and BIO which is what makes it better than qemu for stuff where you want to try and emulate something from the past as closely as possible.
For example, R83 requires some special BIOs stuff that qemu doesn't handle with their bios. However by using AMI bios with PCem, I was able to get it to run.
On Arch, PCem can be installed via the AUR.
cd ~/builds
git clone https://aur.archlinux.org/pcem.git
cd pcem
makepkg -si
You will need to download the roms for pcem from another repo.
git clone https://github.com/BaRRaKudaRain/PCem-ROMs.git
cd PCem-Roms
mv * ~/.pcem/roms