Apple LaserWriter 12/640 PS - Manual (Page 311)

Specifications
Marking engine
m Fuji Xerox P893 laser-xerographic
Laser
m Type: Semiconductor laser GaAlAs
m Wavelength: 780 nm
m Output power: 5 mW
Controller
m AMD Am29040 30-MHz RISC microprocessor
m 4 MB of ROM (including 35 Type 1 fonts)
m 4 MB of RAM (expandable to 64 MB)
m 80C186 I/O processor
m 2 KB parameter EEPROM
m LocalTalk port
m Parallel port
311
Appendix D
Technical Information