If you are printing to a Laserwriter from an MS-DOS machine, and can't
print documents more than two pages long (for instance, a ten-page document
can only be printed as 5 two-page documents,) it is most likely a
"handshaking" problem.
The MS-DOS system and the LaserWriter are not set up for the same kind of
handshaking, and the printout is only one buffer-length long.
Make sure that both the printer and the MS-DOS system are set for either
DTR or Xon/Xoff handshaking.