A piece of history! Riso's first foray into computer interface printing with an accompanying DOS program floppy.
This ad was discovered last year: https://www.youtube.com/watch?v=IyzD77aXuVg
From the manual:
-High speed printing, made possible by the use of Intel RISC microprocessors
-Support for common printer languages: PCL (PeerlessPrint5) and PostScript (TrueImage)
-Switching between printing and scanning operations
-True 400 X 400 dpi resolution
- Multiple print directions on the same page
-Auto rotation for fonts and raster graphics
-5 MB of RAM expandable to 8 MB
-Emulates HP LaserJet III and/or Apple LaserWriter printers
-Scan images on the Risograph and import the TIFF 5.0 files into your computer
-Apple LocalTalk interface for Macintosh computers
-Standard Parallel, RS232, and RS422 interfaces for other computers
-A special interface program for PC users
-Paper sizes 4" X 6" to 11" x 17"
-Print area 8.2 X 13.8" with standard memory and 10.5" X 16.5" with expanded memory
-256 Shades of gray
-Scan images up to 8.3" X 13.5"