[texhax] need certain amount of room on page

[D. R. Evans]

I know I knew how to do this once upon a time, but that knowledge has
disappeared into the mists of time :-(

In plain TeX I want to do the following:
  if there is X amount of remaining space on the current page:
    do A
  else
    do B

Can anyone suggest anything? I don't remember it as being difficult, but
nothing I've tried this afternoon has quite done the job properly.

  Doc

-- 
Web:  http://www.sff.net/people/N7DR

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