archive.worldofdragon.org

I've uploaded the CAS file to the archive and created a rudimentary wiki-page for this game.

-- Rolf

For a very limited time, you can download a "special edition" of this book from this location. This edition reads properly in two-page viewing mode when Show Cover Page in Two-Page View is enabled in Acrobat Reader. Enjoy, Alastair

-- Rolf

Thanks. I managed to reproduce the behavior that you're seeing in a fresh install of Acrobat Reader 11. The "Show cover page in two-page view" option is not enabled by default, so I'm reluctant to change the PDFs in the archive. However, when experimenting with this, I made a version of Programming ...

Hmmm... I moved the back cover the page 2 to mimic the way O'Reilly creates their PDF books. In both Adobe Reader and Foxit Reader, both books show correctly in two-page side by side view with odd pages to the left. The first double-page is the front and back cover. What reader are you using? -- Rolf

I have uploaded new versions of both Programming the 6809 and Advanced Sound and Graphics to better support two-page reading. Enjoy.

-- Rolf

I'll fix it, but it will probably not happen before the weekend.

-- Rolf

Pin 20 can go directly to Vcc. That should do the trick.

-- Rolf

I'd rather disconnect the original Chip Enable signal, at pin 20, by wiring that to 5V. This is the well-defined way of putting the IC "to rest".

-- Rolf

I've just uploaded Programming the 6809 to the archive and updated the wiki with a download link. This is a classic textbook on machine code programming for the 6809 processor, but not specifically for programming the Dragon. In fact, the Dragon is not mentioned at all in this book.

-- Rolf

I did a quick check, and it looks like all my old Dragon Data game cartridges use one or two TMS2532 EPROMS. The DragonDos disk controller uses a single 2764 EPROM. The Compusense DASM/DEMON cartridge uses a single 2764 EPROM, but the PCB actually seems to have space for two of these. As pointed out...