Here are some Technical Systems Consultants, Inc. manuals scanned by Joel Setton. Joel would like to know about any errors you find. You can contact him at:
6809 FLEX User's Manual (59 Pages PDF 110k)
6809 FLEX Programmers Manual (62 Pages PDF 144k)
6809 FLEX Adaptation Guide (103 Pages PDF 250k)
Sort / Merge User's Manual (71 Pages PDF 160k)
Extended BASIC User's Manual (88 Pages PDF 220k)
Additional FLEX software documentation can be found on the FLEX User Group site.
Michael Holley's SWTPC Collection Home Page