Apple LaserWriter 12/640 PS - Manual (Page 268)

4 Choose the port settings you want.
m The LocalTalk interface is always set to PostScript mode.
m You can set the EtherTalk interface to PostScript mode or turn it off.
m You can set the NetWare interface to PostScript mode, PCL5 mode,
AutoSelect mode (which automatically senses whether PostScript or PCL5
mode should be selected), or turn it off.
m You can set the TCP/IP interface to PostScript mode, PCL5 mode,
AutoSelect mode (which automatically senses whether PostScript or PCL5
mode should be selected), or turn it off.
m You can set the Parallel interface to PostScript mode, PCL5 mode, or
AutoSelect mode (which automatically senses whether PostScript or PCL5
mode should be selected). You can also set the Parallel protocol to normal,
raw, or TBCP.
IMPORTANT If you activate the EtherTalk, NetWare, or TCP/IP interface, the
change does not take effect until the printer is restarted.
5 Click Send to send the communication configuration settings to the printer.
Resetting communication settings
To restore the communication settings to the factory defaults:
1 Set the communication switch on the printer to the Reset (out) position.
Communication
switch
268 Appendix A