Current version :

PCem v12 for Windows
PCem v12 for Linux

Old versions :

PCem v11 for Windows
PCem v11 for Linux
PCem v10.1 for Windows
PCem v10.1 for Linux
PCem v10 for Windows
PCem v10 for Linux
PCem v9 for Windows
PCem v9 for Linux
PCem v8.1 for Windows
PCem v8 for Windows
PCem v0.7 for Windows
PCem v0.6 for Windows
PCem v0.5 for Windows
PCem v0.41a for Windows
PCem v0.41 for Windows
PCem v0.4 for Windows
PCem v0.3 for Windows
PCem v0.2a for Windows
PCem v0.1 for Windows

Useful downloads :

Generic clone XT BIOS ROMs.
There appears to be no copyright on this BIOS at all so I have no issues with distributing it.