archive.worldofdragon.org

So, the &HFFD9 mode can only be used for very short periods of time? I guess so - for however long the RAM can go without refresh. Interesting thought though - you should definitely be alright for some short time into the vertical refresh - I think some experimentation is in order :D I don't like t...

Some questions... (1) Is it true that RAM refresh is disabled on Dragon/CoCo machines when running &HFFD9 mode? According to the SAM data sheet, yes. Think of it in terms of the SAM having only two "slots" for RAM accesses - usually one goes to the CPU and one to the VDG. RAM refresh occurs during ...

Happy christmas to all!

Sorry I didn't get you a card...

Thanks! Though the PDF is really thanks to Texinfo - LaTeX for lazy people!

Is... sort-of released. I wanted to get something out before Christmas, so I've thrown the source tarball up, along with the new manual and a Mac OS X build, as I have a Mac here. If I get time before I have to get the train tonight, I'll try for some other builds, otherwise it'll have to be next we...

Woo, glad to be of service

Have you tried the CAS I posted? The headers on that should be long enough that a cas2wav would still work.

http://www.6809.org.uk/tmp/da/synther7_coco.wav.gz for a gzipped WAV.

They both work under emulation. The CAS posted to coco3.com needs an extra byte tagged on the end to load in XRoar (I've made the next release cope with this), but it does work. Doesn't autostart though, as it's just a save out from a disk file. Mine autostarts as I've just patched a tidied version ...

Ok I had some time before leaving for work this morning so... It looks very like the Dragon version was just patched from an original CoCo one: after detecting a keypress, it calculates a "scan code" then JSRs to a routine that just adjusts this scan code back to what it would have been on a CoCo. N...

A quick bash to get it loading here: http://www.6809.org.uk/tmp/da/synther7_coco_step1.cas It's heavily keyboard-based though, so getting the scanning right will be a pig unless it turns out to be using some sort of lookup table. I'll see if anything falls out of a trace of execution if I get a mome...