These files will let you run ForthOS under a virtual PC

Bochs

If you just want to quickly lay hands on ForthOS, install the PC emulator Bochs.

Then grab the "bochsrc" file (usually used by Bochs under the name ".bochsrc"), and this disk image which it will load. Tell Bochs to start up, and you should be in a ForthOS environment.

qemu x86

The disk image appears to work fine with qemu x86 emulation as well.