UPDATE...
It appears that Emco did not include some g-code cycles in Fanuc "A" mode, as well as making typos in the latest programming manual for Fanuc 21.
Switched to Fanuc "C" mode and the radial cycles (G77/G33) started working. No documentation about this in the manual, but my guess is that "A" mode simply wasn't tested or given the attention that "C" mode or the Siemens alternate control was.
Programming description is accurate for "C" mode, but the example program(s) contain errors which will cause alarms or crashes. Just for posterity... don't use the examples in the manual to test functionality - or at least run them in air at low FR.
Have yet to try rigid tapping yet in "C" mode, but I suspect it isn't going to work and that floating holders/collets are required.