See "dg_peterson.html" on this site for more information. This material is copyright (c) 2012 Herb Johnson, who edited these remarks. [As of June 2012,] here is a fairly complete list of DG papers I have: A list of my Digital Group Papers: 01. Edit Characters for TV 02. 6800 Operating System for the Digital Group 6800 CPU card 03. 6501/6502 Operating System for the Digital Group 6501/6502 CPU Card 04. 650x / 6800 Special Notes 05. 8080 Programming 06. Digital Group 8080 CPU Card 07. Three-part memory test program 08. New DG OP/SYS format with cursor for Z-80 System 09. Super Clock 10. Digital Group 8080 Distribution Cassette 11. Digital Group Systems 12. Converting a standard TV set to a monitor 13. Digital Group Z-80 CPU 14. Digital Group Z-80 Distribution Cassette 15. Backplane Connector Protocol 16. Digital Group Input/Output Card 17. The Digital Group 8K x 8 Ram Memory Card 18. Digital Group Systems - General Information 19. Digital Group Low-Current Power Supply 20. Digital Group TV Readout / Cassette Interface Card 21. PHIMON Operating System Manual 22. The Digital Group Flyer #6 23. Flyer News 24. The Digital Group Flyer (un-nmbered) 25. Scientific Calculator Program by Dr. Robert Suding; Packet #3 for the 8008 26. Extensions and Modifications to the Mark-8 by Dr. Robert Suding; Packet # 1 27. Technical Flyer #1 28. Various programming aids, etc.mostly single pages Some of these papers I have multiple copies of. I believe they are the same, but I have not inspected them closely enough to establish this beyond doubt. Most papers are around a half dozed or so 2 sided pages, some with attached single sided schematics, B size ? Greg Peterson