Introduction
This is a very early compilation of technical reference documents for the MC6809, HT6309, Tandy Color Computer, Tano Dragon, and the Vectrex Home Arcade System. The primary focus of this collection is to provide a streamlined set of documents for assembly language programmers using either the CASM or CCASM cross-platform assemblers.

The contents of this collection have been acquired over the years and have either been written by myself or others who have at one time or another been involved with a Motorola MC6809 based computer. I expect that as this collection grows and more information is added other MC6809 based systems will be included. I am hoping that in the near future arcade systems such as those for Ghosts and Goblins, Joust, and Defender which all use a MC6809 CPU will be added to the collection.

The following people have in some way contributed to this collection:

    Alan Dekok - For maintaining the HT6309 Technical Reference all these years.
    Ken Johnston for his "CoCo 3 Register Information" Guide
    John Kowalski - Deluxe RS-232 register documentation.
    Paul D. Burgin - For the information regarding the specifics of the Dragon.
    William Barden Jr.; TRS-80 Color Computer Assembly Language Programming.
    Tim Lindner for the Speech and Sound manual.