The HDI-45 connector isn't a problem.

I have a adapter connected to a second adapter that goes to my PC monitor.

Does your 6100 have a CDROM?

Did you check the Hard Disk size?

Not all 6100 have a CD drive or L2 cache,they also vary in HDD volume.

The 6100 is said to support Mac OS up to 9.04,Linux or MKlinux.