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It appears that Mame Dragon disk drive emulation is broken for some non-standard disk formats as well. Soren's 80 track OS9 system disk image (.VDK) works great on Xroar. https://www.roug.org/retrocomputing/os/os9 But it fails to get past loading the boot track on Mame. Most likely because double si...

Uses a 6821 to interface the 14B multibutton voltmace joystick...

https://www.facebook.com/groups/dragon3 ... 985205629/

A bit of disassembly of the ROMs and then some searching on here... CLS 9 switches the G0 value in text mode and determines whether character set 0 or 1 from the ROM is used. It stores details of the mode setting in bit 4 in zero page $77. This isn't switching INT/EXT character set. Sixxie and co al...

Have a look at the DOS command. I think this does a two byte read, to check for the presence of the boot track signature. So a one byte read, or any other number should be possible, assuming you only want to start at the beginning of the sector. I don't think the disk controller is able to allow pre...

I unbundled Telepost System's Terminal Simulator cartridge for the Dragon 64 into just an ordinary OS9 application that can be run from disk. It's here: http://archive.worldofdragon.org/phpBB3/viewtopic.php?f=5&t=5781 The original ROM cartridge image is attached. I can't locate it in the Archive, so...

Here's something I've been meaning to post for a while. Duncan Smeed brought a little bare cartridge board along to the Dragon meet last year which when plugged into a machine booted straight Telepost Systems 'Terminal Simulator'. A little inspection of this program suggested the cartridge was on OS...

Here's a version of the minted WYSIWYG editor which I hacked together for the 80 column DragonPlus screen driver...

I had a copy of this running briefly on Tony's DragonPlus machine at the Dragon meetup last year, but I don't think I posted it anywhere.

Hi Patrick, If you are hoping to back your disks up to modern PCs and disk images which can be loaded in an emulator, or from which files can be extracted into modern PCs using other tools, then it sounds like Drivewire is probably the way to go, in terms of minimal setup. You'll need a cable, which...

Hi Casper, There are a bunch of possible issues, from power supply, dead drive board, seized motors or other mechanics, to floppy controller calibration. Are you on the Dragon Facebook group? It's a bit more active and might help find someone local who can help... BBC disk drives are a good source o...

What's this... a SAM daughterboard? Huh?