This is TeX, Version 0.94 (INITEX)  9 JAN 1983 19:17
**trip
(TRIP.TEX
> \rip .
l.30   \showthe\font
                     \showthe\pageshrink \showthe\pagegoal

> 0.0pt.
l.30 ...font \showthe\pageshrink
                                 \showthe\pagegoal

> 16383.99998pt.
l.30 ...shrink \showthe\pagegoal
                                

! Illegal unit of measure (replaced by filll).
l.35 ...ip200 = 10pt plus5fillll
                                minus 0 fill
I dddon't go any higher than filll.

\one \csname 
Beginning to dump on file TRIP.FMT (format=trip 83.1.9)
1153 strings of total length 22846
433 memory locations dumped; current usage is 81&253
297 multiletter control sequences
\font\rip=trip
\font\smalltrip=trip at 5.0pt
\font\bigtrip=trip at 20.0pt
540 words of font info for 3 preloaded fonts
1 hyphenation exception
Hyphenation trie of length 137 has 5 ops
No output file.