Search found 268 matches
- Wed Apr 29, 2020 10:04 pm
- Forum: Dragon General
- Topic: Dragon power board problems!
- Replies: 9
- Views: 10648
Re: Dragon power board problems!
Regarding OS9 crashing, I'm not sure if this is relevant but stock OS9 doesn't boot on upgraded D32s because it expects the D64 serial port to be present at $ff04. On a D32, OS9 ends up writing to the low pia instead and freezes the machine during boot. I think the D32 64K upgrade guide describes h...
- Wed Apr 22, 2020 1:26 pm
- Forum: Dragon General
- Topic: Debugging a real Dragon with NoICE - serial port
- Replies: 7
- Views: 10179
Re: Debugging a real Dragon with NoICE - serial port
I've used the Godil based emulator, and it is indeed excellent, being able to supend the CPU and look at registers / memory / single step is
indeeed useful.
There is anew version that has a proper level translator board and a cheapish FPGA development board.
Cheers.
Phill.
indeeed useful.
There is anew version that has a proper level translator board and a cheapish FPGA development board.
Cheers.
Phill.
- Thu Mar 26, 2020 8:12 pm
- Forum: Dragon General
- Topic: Dragon Beta OS-9 disks
- Replies: 17
- Views: 23392
Re: Dragon Beta OS-9 disks
Thanks, at least I can now rule out any mis-interpretation of the floppy format. Are all discs bootable? Took another look at the driver last night, the implementation of the memory banking looks overly complicated, and is probably now broken. The memory sub-system in MAME has improved immensely si...
- Thu Mar 26, 2020 1:32 am
- Forum: Dragon General
- Topic: Dragon Beta OS-9 disks
- Replies: 17
- Views: 23392
Re: Dragon Beta OS-9 disks
Who actually has these Beta OS-9 floppies? Could they be re-imaged in a more suitable format such as HFE? I have a copy of them, I can rig up a grease wezel setup and archive them at some point if you want. Yes please :) I've uploaded the zipped .scp files of the disks to : http://penguin.stats.war...
- Wed Mar 25, 2020 7:03 pm
- Forum: Dragon General
- Topic: Dragon Beta OS-9 disks
- Replies: 17
- Views: 23392
- Tue Mar 03, 2020 11:04 am
- Forum: Dragon General
- Topic: Dragon ROM souce code.
- Replies: 3
- Views: 6962
Dragon ROM souce code.
Hi all,
Just to let you all know I have put the dissassembled, re-assembleable and commented source for the Dragon 32 & 64 ROMS online at :
https://github.com/prime6809/DragonRom
Cheers.
Phill.
Just to let you all know I have put the dissassembled, re-assembleable and commented source for the Dragon 32 & 64 ROMS online at :
https://github.com/prime6809/DragonRom
Cheers.
Phill.
- Sat Jul 27, 2019 12:14 pm
- Forum: Discuss This Site
- Topic: Hardware Forum Needed?
- Replies: 3
- Views: 18003
Re: Hardware Forum Needed?
Sounds like a good idea to me.
Cheers.
Phill.
Cheers.
Phill.
- Sat Jul 20, 2019 7:22 pm
- Forum: Dragon General
- Topic: Loading files into Xroar....
- Replies: 9
- Views: 9986
Re: Loading files into Xroar....
Just use File->Load or File->Run. XRoar recognises initial $55 (in a file with ".bin" extension) as DragonDOS and parses the header. You should then find it in memory... (FWIW, if it sees an initial $00, it tries it as a CoCo RS-DOS binary instead) Oh, and BASIC files not supported yet... Should pr...
- Sat Jul 20, 2019 7:21 pm
- Forum: Dragon General
- Topic: Loading files into Xroar....
- Replies: 9
- Views: 9986
Re: Loading files into Xroar....
MAME / MESS can't load these files natively, but a version with the debugger enabled I can drop to the debugger console and use the load command to load the file at load address - header len with something like : I could easily add native support for these using the Quickload option. Can you post a...
- Fri Jul 19, 2019 11:21 pm
- Forum: Dragon General
- Topic: Loading files into Xroar....
- Replies: 9
- Views: 9986
Loading files into Xroar....
Hi All, Is there a way of loading files that have a DragonDos header into Xroar....not here I don't mean from a disk image! Files in theis format are what the DragonMMC uses for files saved direct to the FAT filesystem with MLOAD / MSAVE. The format of the header is : Byte(s) Purpose $00 Start marke...