Apple LaserWriter 12/640 PS - Manual (Page 371)

m AAUI Ethernet port with three protocols:
EtherTalk
Novell NetWare IPX (PSERVER or RPRINTER)
TCP/IP (BSD lpd )
m External Ethernet transceivers available for:
Thin Coax (10BASE-2)
Twisted Pair (10BASE-T)
Thick Coax (10BASE-5)
m Two-position communication switch
m All ports/protocols simultaneously active
m 600 dpi resolution
m 600 dpi FinePrint (edge enhancement for text and line art)
m Enhanced 600 dpi grayscale imaging:
Standard
85 lines/inch dithered halftone, 101 gray levels
106 lines/inch dithered halftone, 129 gray levels
141 lines/inch dithered halftone, 73 gray levels
PhotoGrade (with 12 MB of RAM)
85 lines/inch halftone, 201 gray levels
106 lines/inch halftone, 257 gray levels
141 lines/inch halftone, 145 gray levels
m PostScript Level 2 (2015)
m PCL5 (LaserJet IIID emulation)
m Automatic emulation switching
346 Appendix D