AL KOSSOW WRITES: ... I've had really bad luck with getting people to reply to email reqs for info on these systems (very frustrating..) Here is what I found Have with my systems. Many of theese DOCs are three hole punched, But Heavy Machine stapled as well: 990 Computer Family Systems Handbook Manual NO.945250-9701 Copyright 1975,1976 3rd Edition May 1976 paperback Handbook not ring bound ---------------------------------------------------------------------------- --------- DS990 COMMERCIAL SYSTEMS (3-inch Ring Binder) DS990 Models 4, 6, and 8, Systems Installation and Operation Manual Part No. 946284-9701 *A 15 September 1980 Model 990 Computer Model 810 Printer Installation and Operation Part No. 939460-9701 *A 15 May 1979 Model 990 Computer Universal ROM Loader User's Guide Part No. 2270534-9701 ** 15 April 1980 Model 990 Computer Model 911 Video Display Terminal Installation and Operation Part No. 945423-9701 *B 15 October 1981 DS990 Models 4 Through 9 Systems Site Preparation Part No. 2250361-9701 *C 1 May 1981 Model 990/10 Computer System Hardware Reference Manual Part No. 945417-9701 *B 15 November 1980 ---------------------------------------------------------------------------- ------------ Model 990/10 Computer System Hardware Reference Manual Part No. 945417-9701 *A 15 November 1979 ---------------------------------------------------------------------------- ----------- Model 990 Computer TX990 Operating System Programmers Guide ( Release 2) Manual No. 946259-9701 Original issue 1 April 1977 ---------------------------------------------------------------------------- ----------- Model 990 Computer TMS9900 Microprocessor Assembly Language Programmer's Guide Manual No. 943441-9701 Original Issue 1 June 1974 Revised and reissued 1 January 1976 ---------------------------------------------------------------------------- ----------- DS990 Commercial Systems ( 2.75-inch Ring Binder) Model 990 Computer Model DS10 Cartridge Disk System Installation and Operation Part No. 946261-9701 *A 15 August 1980 Model 990 Computer DS990 System Installation and Operation Manual Part No. 946284-9701 1 April 1979 Model 990 Computer Model 911 Video Display Terminal Installation and Operation Manual No. 945423-9701 Original issue 1 June 1977 Revised and reissued 15 January 1979 ---------------------------------------------------------------------------- -------- DX10 OPERATING SYSTEM Operation Guide Part No. 946250-9702 *F Volume II I have three of the DS10 Cartridge Disk Drives and 6 Removable Cartridge (Platters) IF I Have the DX 10 OS Software, I need learn how to get "down" to it. I started reading about serveral command syntax programmer interfaces. One Called SCI, another Called OCP, and then of coarse the DX10 OS Command syntax.