Search found 85 matches

by bluearcus
Fri Mar 05, 2021 12:55 am
Forum: Dragon General
Topic: Comparison of Dragon mass storage options
Replies: 14
Views: 6720

Re: Comparison of Dragon mass storage options

Updated to reflect Phil's creation of OS9 drivers for the DragonMMC...
by bluearcus
Sun Feb 28, 2021 12:10 am
Forum: Dragon Hardware
Topic: Experimental Blitter
Replies: 8
Views: 1114

Re: Experimental Blitter

Wow, very very cool! :o In this demo, is there any proportion of the CPU time that's free (not setup, and unhalted) cycles? Or have you filled the frame period to the brim? My mind is always drawn to all of the time on the bus available from the inside of the machine (AVMA and !E when outside of the...
by bluearcus
Sat Jan 09, 2021 8:06 pm
Forum: Dragon Hardware
Topic: Problems with DOS using an Y-type connection
Replies: 42
Views: 7730

Re: Problems with DOS using an Y-type connection

That's really excellent news!
by bluearcus
Sun Jan 03, 2021 2:04 pm
Forum: Dragon Hardware
Topic: Problems with DOS using an Y-type connection
Replies: 42
Views: 7730

Re: Problems with DOS using an Y-type connection

That difference in the read loop would shorten the time the PIA line and FIRQ were asserted for by a few cycles. And as I mentioned, it's already pulled low a lot more than it is with a standard DOS cartridge timing (from chatting with Darren before about Dragon OS9 boot unreliability). From some ol...
by bluearcus
Fri Jan 01, 2021 9:36 pm
Forum: Software Requests
Topic: Jaysoft - Taipan
Replies: 7
Views: 2063

Re: Jaysoft - Taipan

Right, have done some trawling through some old disks with the aid of my greaseweazle over the last few days and have managed to find a copy of the game on an old disk which may well be the Dragon version shipped by Jaysoft.

It's attached below.
TAIPAN.CAS
Jaysoft - Taipan (from disk)
(8 KiB) Downloaded 144 times
by bluearcus
Thu Dec 31, 2020 12:17 pm
Forum: Dragon Hardware
Topic: Problems with DOS using an Y-type connection
Replies: 42
Views: 7730

Re: Problems with DOS using an Y-type connection

I don't think the clock module has anything to do with it... that's late on in the boot process, and the crashes appear to be almost immediately after loading the boot track, or during the boot module's attempt to load the OS9Boot file. But I have observed very very similar crashes with all disk boo...
by bluearcus
Wed Dec 30, 2020 11:27 pm
Forum: Dragon Hardware
Topic: Problems with DOS using an Y-type connection
Replies: 42
Views: 7730

Re: Problems with DOS using an Y-type connection

I have an upgraded 2A 5V power setup as well... and it seems to improve reliability of OS9 CoCoSDC booting, but it definitely doesn't categorically fix it. A cold Dragon 64 is poor, a Dragon 32(64) is generally better, and the machines improve as they warm up. On those lines, I've done some recappin...
by bluearcus
Wed Dec 30, 2020 8:21 pm
Forum: Dragon Hardware
Topic: Problems with DOS using an Y-type connection
Replies: 42
Views: 7730

Re: Problems with DOS using an Y-type connection

This feels to me like the same SDC 'I wonder, is it a power issue' problem which frequently prevents OS9 booting on Dragon 64s...

The fact the EH DragonDOS and SuperDOS E6 seem to be hugely more reliable gives some additional testing options to try.
by bluearcus
Mon Dec 28, 2020 7:14 pm
Forum: Uploads
Topic: FEdit v1.01 released to public domain
Replies: 3
Views: 2104

Re: FEdit v1.01 released to public domain

Still the best text editor ever for the Dragon! Thanks Geir.
by bluearcus
Sat Dec 26, 2020 11:13 pm
Forum: Software Requests
Topic: Jaysoft - Taipan
Replies: 7
Views: 2063

Re: Jaysoft - Taipan

Wow, that is some cool reverse engineering! I'd seen the Portuguese variant existed, but using the Spectrum versions from Jaysoft to allow it to be translated back has produced something that's exactly as I remember it. Winning is broken though and the Debt collectors definitely aren't active yet......