archive.worldofdragon.org

Maybe if you didn't use any of the fanciness... XRoar's become a lot more resource-hungry over the years, as reasonable assumptions of available desktop power climb. It might mean reverting some of the stuff that happens cycle-by-cycle now but used to be bunched up inaccurately for speed. And the vi...

And now 1.2 - lots of work on the build system means you now don't have to touch the ISE GUI. You still need it installed of course, but if you set up your environment as usual, you can just type 'make' in the cpld/ directory and out pops a set of JED (and SVF) variants. BIG ASTERISK: only tested un...

So thanks to lots of testing by Pedro Peña across his CoCo collection, SAMx4 now supports 4K and 16K ram sizes (and the extra 16K ram size in the '785). https://www.6809.org.uk/dragon/samx4/ Pedro's also designed a smaller version of the board, which is in the "rockyhill" branch in the gitlab reposi...

I've got a .CAS file with a big BASIC program in. I'd love to edit it on my computer. So I thought, simple, I'll save as ASCII from within XRoar - but, actually, can I do that? I can do a CSAVEM"STUFF",A - but it's still padded with a bunch of CAS stuff. So what's a nice simple way to get a BASIC f...

Right. This works for everything odd I can find to throw at it. So at the risk of triggering a really obvious realisation, here's the current state of play, with downloads and what-not:

http://www.6809.org.uk/dragon/samx4/

robcfg wrote: ↑Wed Nov 29, 2023 7:57 pm Have you considered implementing a full Dragon on something like the Tang Nano 20K or similar?

Well, no time soon I imagine. Aren't there already "mister" setups for coco/dragon?

I'll just add that without a testbench that Stewart whipped up, fixing that would have taken a _lot_ longer, so thanks a lot, Stew!

http://www.6809.org.uk/tmp/samx4-wip/silky.mp4 I'm not especially keen on what I had to do to make that work (delay video mode register setting by two full cycles!), but work it does. So bar it turning out that it's screwed something else up by doing that, I'll try and prep the source etc. by the w...

After a note from Stewart, the refresh tester output seems to be fixed (and along with it the transition from slow to actually-fast mode).

Still not managed to figure out the glitch glitch, but I figured I'd test it with Phill's diag cart.

At first it completely failed! But once I removed the special-casing of $FF3x: