Search found 57 matches

by bluearcus
Mon Mar 23, 2020 2:50 pm
Forum: Dragon General
Topic: Debugging a real Dragon with NoICE - serial port
Replies: 5
Views: 1042

Re: Debugging a real Dragon with NoICE - serial port

Hi Pere, I think it's probably most useful for real hardware scenarios, as you say. I have been looking for a real hardware options for some time, and this looks useful. I understand also that there is a Nitros9 module, though whether it can work in L1 may be an issue, but it's a very interesting pr...
by bluearcus
Sun Mar 22, 2020 7:59 pm
Forum: Dragon General
Topic: Debugging a real Dragon with NoICE - serial port
Replies: 5
Views: 1042

Re: Debugging a real Dragon with NoICE - serial port

I just came across this thread... wow, another excellent Dragon tool! To make it even more worthwhile, the NoICE author loves the 6809 and 6309 so much that, unlike every other CPU the project supports, he will offer the license for 6809 and 6309 for free if you simply email him and let him know abo...
by bluearcus
Sun Mar 22, 2020 6:39 pm
Forum: Dragon General
Topic: A next-generation Dragon?
Replies: 24
Views: 905

Re: A next-generation Dragon?

The main parts of a next generation Dragon are effectively in existence right now... A 6309 machine, with CoCoSDC and V9958 based Graphics. Keeping the SAM/VDG keeps backwards compatibility. Add something that gives CoCo3 style paged memory capability - like Tormod's MOOH, or the still vaporware CoC...
by bluearcus
Sun Mar 22, 2020 6:18 pm
Forum: Dragon Hardware
Topic: Using the Wordpak2+ on the Dragon
Replies: 28
Views: 858

Re: Using the Wordpak2+ on the Dragon

Yeah, Wordpak 2+ and multipak emulation for the Dragon in Mame will be nice wins. Thanks Pernod!
by bluearcus
Mon Feb 03, 2020 5:46 pm
Forum: Dragon Hardware
Topic: Dragon64
Replies: 7
Views: 1486

Re: Dragon64

This is interesting - I have a Dragon 32 which I've just acquired that displays EXACTLY the same symptom.

It boots normally, then after a very short time, the screen instantly changes colour set and clears.

Haven't had time to investigate further, certainly a strange one.
by bluearcus
Tue Jan 28, 2020 5:20 pm
Forum: Dragon General
Topic: Dragon 32 Project Leader
Replies: 6
Views: 875

Re: Dragon 32 Project Leader

Hello Ian and welcome! If you are on Facebook, you may find some interesting bits and pieces in the Dragon 32/64 Owners/Users Facebook group. It has a fair amount of daily activity. We now have an annual Dragon meetup too, which has been at the Centre for Computing History in Cambridge in previous y...
by bluearcus
Tue Dec 31, 2019 3:28 pm
Forum: Dragon General
Topic: Autoboot for floppydisk
Replies: 2
Views: 463

Re: Autoboot for floppydisk

Hi RedBlueFlame, Reading the directory entries can be done from BASIC by getting raw disk sectors in the directory area using the DragonDOS sector read commands. SREAD is the command, and it takes a drive number, track number and sector number, and two string variables as parameter: SREAD 1,20,3,S1$...
by bluearcus
Tue Dec 31, 2019 2:02 pm
Forum: Dragon Hardware
Topic: Upgraded Dragon32 ram test software
Replies: 10
Views: 1774

Re: Upgraded Dragon32 ram test software

Some excellent hacking there!
by bluearcus
Mon Dec 23, 2019 3:02 am
Forum: Uploads
Topic: D32 serial port upgrade.
Replies: 1
Views: 635

Re: D32 serial port upgrade.

Nice one Jim!
by bluearcus
Fri Dec 13, 2019 11:30 pm
Forum: Dragon Hardware
Topic: Zaxxon's floppy drive interface
Replies: 1
Views: 1271

Re: Zaxxon's floppy drive interface

Adjustment procedure is as follows I believe. There are two variable resistors and a variable cap to tweak. Pull the WD2797 pin 22 to GND to force it in to test mode. You now need to adjust three timing / frequency values. Firstly the main data separator clock This is done by looking at the VCO cloc...