Apple Laserwriter, NetBSD and serial printing

[astaude%silas.cc.monash.edu.au@localhost (AS)]

I cannot get my NetBSD1.21 system to print reliably to my Apple Laserwriter
NTX PS printer.

Is it the cable? I have a standard Null modem cable.
Is it my printcap file (as follows):
------------------
ntx|Apple Laserwriter II NTX:\
:lp=/dev/tty00:br#57600:ms=-icanon -isig -iexten -echo -echoe -echok:\
:-echoke -echonl -echoctl -echoprt -altwerase -noflsh -tostop -flusho:\
:-pendin -nokerninfo -extproc -istrip -icrnl -inlcr -igncr -ixon -ixoff:\
:-ixany -imaxbel -ignbrk -brkint -inpck -ignpar -parmrk -opost -onlcr:\
:-oxtabs cread cs7 parenb -parodd hupcl -clocal -cstopb crtscts:\
:-mdmbuf:sd=/var/spool/ntx:lf=/var/log/ntx-errs:sh:\
:lo=/tmp/ntx.lock:mx#0:
------------------
Please, if someone has a similar setup, could you assist me?

          _   _
         ( \-/ )_.-'"``-._                  "My Cat, Wolfy"
          o o `| -._    )-;-,_`)
        =(v_,)=  _  )--\\  ``-'      astaude%silas.cc.monash.edu.au@localhost
        _.- _..-_/ / ((_/                   (Anthony Staude)
      ((_.-'   ((_/