archive.worldofdragon.org

That's a very odd result: when I measure continuity on an original Dragon 64, those two pins are definitely connected on the motherboard. So long as your carrier is connecting both through directly I can't see why your bodge wire would be needed. But at this point I'd just be arguing against reality!

If you're running with a disk system (or emulating one), all the "normal" video addresses move up by 1536 bytes, so if you're setting PMODE4,1 then try POKEing from 3072 on.

What if we generated colour for composite video in a slightly ridiculous and very expensive way?

Well, I'd be able to throw together a little web page about it, for a start:

https://www.6809.org.uk/dev/tm016/

Can it read mail yet?

looks good, here's the original 2600 org $2600 2600 setdp 0 ; assumed 2600 4F53 boot_flag fcc /OS/ 2602 8E262A boot_exec ldx #run_dragon 2605 B6A000 lda $a000 ; [$A000] points to ROM1 in CoCos 2608 8420 anda #$20 260A 2703 beq 10F ; dragon 260C 8E263A ldx #run_coco2 260F CE02DC 10 ldu #$02dc 2612 DF...

Which sector is loaded when you type BOOT? LSN 2? Looking at Ciaran's Blockdown disk image on a hex editor it looks like the boot sector is the 3rd sector (or Track 0, side 0, sector 2). I see on the DragonDOS manual that the boot sector is loaded at 9728 and executed at 9730. Are those decimal add...

Blockdown has a boot sector

I had wondered

Should be fine for me, maybe I'll actually get some project half finished by then.

Interesting generally, but I'm rather selfishly interested in the 6551 code you've written for XRoar