Search found 416 matches

by tormod
Thu Sep 14, 2017 9:56 pm
Forum: Dragon General
Topic: something new (quiz)
Replies: 12
Views: 2040

Taking the Dragon to new levels :-p

Yes, this is Level-2 running on a Dragon, to my knowledge for the first time since Bob Hall in 1989 piggy-backed extra 64K on his Dragon 64 and made his own MMU. And probably the first time on a Dragon 32 :) The MOOH board is the successor to the Spinx-512. Here is the PMAP command, showing running ...
by tormod
Thu Sep 14, 2017 7:46 pm
Forum: Dragon General
Topic: something new (quiz)
Replies: 12
Views: 2040

Re: something new (quiz)

I admit you have to be far into OS-9/NitrOS-9 to spot anything new in that boot screen. Here is the banner page.
img4c.jpg
img4c.jpg (38.92 KiB) Viewed 1369 times
by tormod
Wed Sep 13, 2017 11:16 pm
Forum: Dragon General
Topic: something new (quiz)
Replies: 12
Views: 2040

Re: something new (quiz)

You're good! Indeed it was a missing ASCII->6847 conversion. With all in upper case, and including the header since, yes, it is NitrOS-9 :)
img2c.jpg
img2c.jpg (38.6 KiB) Viewed 1382 times
by tormod
Wed Sep 13, 2017 6:36 pm
Forum: Dragon General
Topic: something new (quiz)
Replies: 12
Views: 2040

Re: something new (quiz)

Just a little hint to why it appears so cryptic :) 6847
by tormod
Tue Sep 12, 2017 11:06 pm
Forum: Dragon General
Topic: something new (quiz)
Replies: 12
Views: 2040

Re: something new (quiz)

I hate to disappoint everyone but it is not a new, cool snake game... It was just luck and circumstances/side effects added some colourful dithering to the display. Here the cleaned, boring fixup. So it looks like some cryptic strings appearing...
img1b.jpg
img1b.jpg (110.25 KiB) Viewed 1414 times
by tormod
Sat Sep 09, 2017 10:40 pm
Forum: Dragon General
Topic: something new (quiz)
Replies: 12
Views: 2040

something new (quiz)

I am brewing on something new to display on this year's VCF. To stir your curiosity, I will progressively drop some screenshots...
img1.jpg
img1.jpg (173.65 KiB) Viewed 1440 times
The hissing of the summer lawns? Is that a smiling green python snake on green grass? Or can something else be hidden in wonderful 6847 scenery?
by tormod
Thu Sep 07, 2017 9:29 pm
Forum: Dragon General
Topic: Vintage Computer Festival, Zurich, 19-20 November
Replies: 8
Views: 1546

Re: Vintage Computer Festival, Zurich, 19-20 November (2016)

Hello! I got silent here for a while, the organisation of the VCF last year took all my time, and after the event I was busy catching up with other stuff and lots of work. vcfech2016_IMGP1417_1024.JPG Anyway, the VCF was a blast! We had more than 1000 visitors, many nice exhibitions and we all had a...
by tormod
Fri Sep 16, 2016 10:36 pm
Forum: Dragon General
Topic: Nitr-OS9 vs OS-9
Replies: 12
Views: 1190

Re: Nitr-OS9 vs OS-9

If you start using gdb on it, you might find these macros useful: https://sourceforge.net/p/nitros9/code/ ... ts/os9.gdb
The most useful macro "os9_mwhere" requires source listings to be useful though. Which brings up a question:

Has anyone done any serious disassembly on Dragon OS-9?
by tormod
Tue Sep 13, 2016 9:35 pm
Forum: Dragon General
Topic: Nitr-OS9 vs OS-9
Replies: 12
Views: 1190

Re: Nitr-OS9 vs OS-9

Yes, the bootloader ("BOOT" command or DWDOS etc) simply loads the "kernel track" into memory from $2600 onwards, and jumps to $2600. This kernel track is composed of REL which relocates the whole thing to upper memory ($EE00 for NitrOS-9), the first part of the kernel OS9, the second part OS9P2, IN...
by tormod
Mon Sep 12, 2016 10:54 pm
Forum: Dragon General
Topic: Nitr-OS9 vs OS-9
Replies: 12
Views: 1190

Re: Nitr-OS9 vs OS-9

Hi Mike, Interesting stuff! Yes, NitrOS-9 level1 has shared some development (actual modules) with level2 and although this has given level1 a lot "for free" it has also become more memory intensive. One could easily make jokes about level1, it has grown so many features and can now do everything......