Search found 228 matches
- Mon Jun 24, 2013 8:18 pm
- Forum: Hints and Tips
- Topic: Introducing: Dragon multi-cartridge for roms
- Replies: 16
- Views: 15533
Re: Introducing: Dragon multi-cartridge for roms
Yeah, the whole thing is funny, or maybe crazy? The most expensive part of my Dragon is the floppy emulator. And the display driver of the cartridge is more powerful, than the Dragon computer itself. By the way, I just bought 16 eproms (C512) for 2.15€ each on ebay. So I'm going to build another fou...
- Mon Jun 24, 2013 7:53 pm
- Forum: Hints and Tips
- Topic: Shift or Rotate from Dragon BASIC
- Replies: 18
- Views: 9177
Re: Shift or Rotate from Dragon BASIC
I never saw a single 8-bit Microsoft Basic interpreter with shift or rotate operators. We did not need this . We would use integer numbers if possible and divide by two or multiply with two. Of course this does only make sense with integers, not floating point numbers.
- Mon Jun 24, 2013 7:37 pm
- Forum: Hints and Tips
- Topic: Introducing: Dragon multi-cartridge for roms
- Replies: 16
- Views: 15533
Re: Introducing: Dragon multi-cartridge for roms
Thanks Rink! Well, I did not think of costs in the first place. I built the whole thing around old components, I had in the drawer. You can see that, if you look at the eproms (quite old NMOS chips), which I pulled off some old PC boards or something, time ago. But they are not extremly expensive: 2...
- Sun Jun 23, 2013 8:43 pm
- Forum: Hints and Tips
- Topic: Introducing: Dragon multi-cartridge for roms
- Replies: 16
- Views: 15533
Re: Introducing: Dragon multi-cartridge for roms
Aha, thanks for the quick reply!
So I will just go on trying some of the rom images from time to time and hope and see...
So I will just go on trying some of the rom images from time to time and hope and see...
- Sun Jun 23, 2013 8:21 pm
- Forum: Dragon General
- Topic: I/O Cartridge (Show and Tell)
- Replies: 24
- Views: 13524
Re: I/O Cartridge (Show and Tell)
Nice board Rink! Seems like nobody is using the Dragon as a controller? Not much discussion going on, hmm. Anyway, good idea for controlling toys like Fischertechnik, LEGO or Märklin. Or how about an "eight channel sound card"? Maybe STEREO: 4 left, 4 right. (You could start a synthesizer demo scene...
- Sun Jun 23, 2013 7:50 pm
- Forum: Hints and Tips
- Topic: Introducing: Dragon multi-cartridge for roms
- Replies: 16
- Views: 15533
Introducing: Dragon multi-cartridge for roms
Hi guys, I just wanted to show you the just finished prototype of my Dragon multi-cartridge (we were discussing it a few month ago). :mrgreen: You'll probably won't like the design, because it's plain green, but that was the cheapest solution (and a can of paint is easy to obtain). And back in the d...
- Wed Apr 24, 2013 12:18 am
- Forum: Hints and Tips
- Topic: Upgrading 32K -> 64K RAM
- Replies: 0
- Views: 1813
Upgrading 32K -> 64K RAM
I successfully upgraded my Dragon 32 to 64 kBytes, as described in the very good article of R. W. Hall (1985) in the "publications/technical"-section of the Dragon Archive. :D I just wanted to write down a short summary for people who may have the same plan. That was kind of a brutal job, to cut of ...
- Wed Apr 10, 2013 2:38 pm
- Forum: Hints and Tips
- Topic: HxC SD Floppy Emulator
- Replies: 15
- Views: 8564
Re: HxC SD Floppy Emulator
Did you keep a list of the problematic wave files and if so will you post that list? Hmmm, not really. I should have done so... Anyway, I've just converted a limited number of programs, yet. There is a short signal dropout in "Dragon Data Ltd - Lunar Rover Patrol [exec].wav" at 1:58 that produces a...
- Wed Apr 10, 2013 1:48 pm
- Forum: Hints and Tips
- Topic: HxC SD Floppy Emulator
- Replies: 15
- Views: 8564
Re: HxC SD Floppy Emulator
Always wanted one of those emulators - but can never justify the expense. Well, the emulator in the deluxe-version with housing ships for 102,99€. Back in the day we paid more for real floppy drives. The Commodore 1541 was sold for about 700 DM in Germany back in 1983. That was considerably more :o...
- Mon Apr 08, 2013 8:06 pm
- Forum: Hints and Tips
- Topic: Schematics of Dragon Cartridges?
- Replies: 23
- Views: 13441
Re: Schematics of Dragon Cartridges?
Probably depends on which part of the world you live in. There are a few interesting wikipedia articles about that. Until the late seventies, there where those German kind of flat (semicircular) symbols I tend to use. The British and the Americans used symbols, which had fancy corners and were a bit...