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TABLE OF CONTENTS1 FOREWORD……………………………………………………………………………………………………12 INTRODUCTION…………………………………………………………………………………………33 HOW TO USE THIS BOOK……………………………………………………………………44 DESCRIPTION OF EXTENDED BASIC……………………………………………5GRAPHICS ROUTINES……………………………………………………………………………7APPENDICESABCDEFGHMEMORY MAPDISASSEMBLY OF EXTENDED BASICEXTENDED BASIC SYMBOL TABLEEXTENDED BASIC ROUTINES AND ENTRY POINTSEXTENDED BASIC’S DATA/ASCII TABLESEXTENDED BASIC ERROR ENTRY POINTSEXTENDED BASIC 1.0 DIFFERENCESASCII CHART
COLOR BASIC UNRAVELLED II FOREWORD ORIGIN: SPECTRAL ASSOCREVISED:12/26/99 WALTER K ZYDHEKFOREWORDDue to the many requests for the Unravelled Series produced by SpectralAssociates, and the fact that these books are rare and no longer in production, Ihave taken it upon myself to reproduce them in electronic .PDF (Adobe Acrobat®)format.I have re-disassembled the ROMs listed in this book, and added all thecomments from the Original Extended Basic Unravelled Book. Some changes were madeto make the book a little easier to read.1. <strong>The</strong> comments have been cleaned up some. In cases where a comments continuedonto the next line, a * is placed in the Labels column, as well as a * atthe beginning of each line of the comment. In cases where the previouscomment used this format, a = was used. This was done in the original, butnot all comments stuck to this format.2. I have renumbered all the line numbers. Each Appendix (with code) starts atLine 0001.3. Some spell checking, and context checking was done to verify accuracy.4. I used the Letter Gothic MT Bold Font. This allows for display of SlashedZeros. I thought it important to be able to distinguish between 0 and O.5. All the Hex code now shows the Opcodes.<strong>The</strong>re were other minor changes that were made to make viewing a littlebetter. If any discrepancies arise, please let me know so that I may correct theerrors. I can be contacted at: mailto:wzydhek@internetcds.comSpecial Thanks to Jean-François Morin for pointing out those “Oops” to me.I’d like to also thank those who have either given me, or loaned me their copy ofthe original Unravelled Series.About MeMy name is Walter K. Zydhek. I’ve been a Computer Hobbyist since 1984 when Ireceived my 1 st Tandy Color Computer 2 for Christmas. It had 32K of ram, Cassette,and one Cartridge. I quickly learned to program in Basic and then moved intoAssembly.Over the next few years, I saved to purchase the Multi-Pak Interface, DiskDrives, Modem, OS-9, and various Odds and Ends.I moved to Tampa Florida and in the move, My CoCo was damaged. I thenreplaced it with the CoCo 3. WOW what a difference. I added the 512K Ram Upgrade, ACM-8 color monitor, and joined the Carolwood CoCo Club. (Thanks Jean-François forreminding me of the name.)I had a couple of close friends that helped me explore the world of CoCo andby this time, I knew that my CoCo would be my friend forever. I give special thanksto Steve Cohn, who helped me get started with ADOS. Two other people whose names Ican’t remember were very beneficial to my mastering of the CoCo.Shortly after getting my CoCo 3, I started BBS’ing. Wow, a whole new world.My knowledge just kept growing.1
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