Search found 142 matches

by bluearcus
Tue May 26, 2020 10:16 am
Forum: Dragon General
Topic: Comparison of Dragon mass storage options
Replies: 16
Views: 25230

Re: Comparison of Dragon mass storage options

Interesting Stew - so have you added a ear and remote socket, and made the uDW play out the cassette loadable Drivewire dweeb?

I might try to add in a drivewire column.
by bluearcus
Sat May 23, 2020 11:51 am
Forum: Dragon General
Topic: Comparison of Dragon mass storage options
Replies: 16
Views: 25230

Comparison of Dragon mass storage options

Phil H-S suggested a comparison between the various mass storage options available for the Dragon would be worthwhile. so I've created one.

It's here:

https://docs.google.com/spreadsheets/d/ ... sp=sharing
by bluearcus
Sun May 17, 2020 3:06 pm
Forum: Dragon General
Topic: MAME Emulation
Replies: 118
Views: 1052955

Re: MAME Emulation - 80 track double sided

Compiled mame 0220 the other week. Still appears to be a problem with Soren's OS9 double sided disk booting, which works fine on a real machine, on Xroar, on multiple drive emulation mass storage solutions.

Something is definitely wrong with Mame's floppy subsystem for Dragon 32/64 machines.
by bluearcus
Wed May 13, 2020 9:01 pm
Forum: Dragon General
Topic: Dragon power board problems!
Replies: 9
Views: 10318

Re: Dragon power board problems!

Interesting measurements Stew! I assume those were all bare-machine, no disk interface and on factory original 4700uFs?

The TO-3 packaged switch mode converters ... this looks like them...

https://www.ezsbc.com/index.php/psu5.html

Too tempting not to try, have ordered a couple.
by bluearcus
Thu May 07, 2020 12:31 am
Forum: Dragon General
Topic: Dragon power board problems!
Replies: 9
Views: 10318

Re: Dragon power board problems!

I'm inclined to agree with Mr. Orchard here... measurements under load are key. I don't even know what some of your franken-dragons might draw on the 5V line, but on my oldest, most heavily used and customised machine power up is unreliable (won't boot, works after reset) with its original power boa...
by bluearcus
Mon Mar 23, 2020 2:50 pm
Forum: Dragon General
Topic: Debugging a real Dragon with NoICE - serial port
Replies: 7
Views: 9755

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: 7
Views: 9755

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: 21893

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+ and the CoCo-PSG on the Dragon
Replies: 41
Views: 43822

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: 8027

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.