Search found 86 matches

by bluearcus
Thu Jun 25, 2020 11:34 pm
Forum: Dragon General
Topic: Dragon power board problems!
Replies: 9
Views: 4862

Re: Dragon power board problems!

Well, the TO-3 LM309 replacements arrived. IMG_20200611_170548.jpg and I (with some trepidation) took the de-soldering iron and braid to the power board on my workhorse D64. IMG_20200623_205857.jpg Actually, I probably didn't need to desolder the main through heatsink GND bolts, they could simply ha...
by bluearcus
Thu Jun 25, 2020 9:06 pm
Forum: Dragon Hardware
Topic: Dragon 200 circuits and lower case mod circuits
Replies: 7
Views: 3357

Re: Dragon 200 circuits and lower case mod circuits

Use the expansion port to host VDG character ROM? In short, not a chance.
by bluearcus
Thu May 28, 2020 4:46 pm
Forum: Dragon General
Topic: Comparison of Dragon mass storage options
Replies: 14
Views: 7250

Re: Comparison of Dragon mass storage options

Yeah, I have a standalone Flashfloppy unit from Zaxon too, and I've used it with the Dragon. I've used 3.5" and 5.25" drives as well. I gave in and added a column for HxC / Flashfloppy / Gotek units but seeing as you need a Dos Cart anyway, for most people it'll be 'Well, where do I get a Dos Cart t...
by bluearcus
Thu May 28, 2020 10:21 am
Forum: Dragon General
Topic: Comparison of Dragon mass storage options
Replies: 14
Views: 7250

Re: Comparison of Dragon mass storage options

I've added in a generic Drivewire option (uDW or PC server) now.

Gotek or Flashfloppy standalone I'm a bit cautious about adding in.
by bluearcus
Tue May 26, 2020 10:16 am
Forum: Dragon General
Topic: Comparison of Dragon mass storage options
Replies: 14
Views: 7250

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: 14
Views: 7250

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: 95
Views: 47234

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: 4862

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: 4862

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: 4555

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...