Control Characters in nroff

[Henry Spencer]

> Does anyone out there have experience in embedding non-printing ASCII
> characters in an nroff file ?  For example, the NEC Laser Printers use an
> ASCII FS (Form Separator) character to control various font / print modes.
> I have had no problems embedding an ASCII ESC (Escape)...

I'm rather surprised that you got away with ESC.  Nroff/troff converts its
input entirely into its own internal alphabet while processing, and if the
character you want isn't in the internal alphabet, you're up the creek.
There is no way, short of getting something else through and then translating
that into the character you want.
-- 
"We must choose: the stars or	Henry Spencer @ U of Toronto Zoology
the dust.  Which shall it be?"	{allegra,ihnp4,decvax,pyramid}!utzoo!henry