I remember being quite delighted when I discovered that SUN servers had FORTH right there in the firmware. I wrote many a little easter egg in there. I do wonder if anyone ever found any of my strange dictionary words.
Did anyone use any FORTH that was in any of the other OpenFirmware implementations? I only used the SUN one
I briefly used the OpenFirmware that shipped on Apple PowerPC-based Macs, CMD+OPT+O+F at boot would get you to it.