1.5MB of RAM soldered on the motherboard.   Not upgradeable.

Page Description Language / Emulation:
PostScript® level 1 /  Diablo 630 using a subset of the Diablo command set.

Print Engine: 
Canon LBP-CX laser-xerographic.

Speed:
8 pages per minute maximum.  Actual speed depends on image complexity.

Print Quality:
300 dot-per-inch text and graphics.

Fonts (On Disk):
Courier, Helvetica, Symbol, and Times.
Font styles: plain, bold, italic, and bold italic, with additional styles depending on the application.  (For best results, these fonts should be installed in the System file in your Macintosh computer from the disks shipped with the LaserWriter).

Imageable Area:
Letter size: 8.0 by 10.9 in.
legal: 7.0 by 12.5 in.
A4: 7.5 by 10.5 in.
B5: 7.0 by 10.0 in.

Interfaces:
AppleTalk.
RS-232C via PostScript.
Special Diablo 630.

Recommended Duty Cycle:
Printer: Less than 4000 pages per month.
Toner: 2,000 to 3,000 pages.

Paper Capacity (Cassettes):
Auto - 200 Sheets: US Letter, Legal, A4, B5.
Manual - Single Sheets: US Letter, Legal, A4, B5.
Envelope: 15 envelopes.

From Automatic cassette:
Optimum= Single sheet photocopy bond.
Range= Letterhead and color stock, 16 to 21.33 pounds.

Power Requirements:
 US Model M0156: 115 VAC (+/- 10 percent) 60 Hz.
Amp requirements (maximum power utilization): 6.6 amps.
European Model M0156Z: 220 VAC (+/- 10 percent) 50 Hz.  240 VAC (+/- 10 percent) 50 Hz.