Search found 258 matches

by prime
Fri Jun 15, 2018 1:11 am
Forum: Dragon Hardware
Topic: DragonMMC Announcement.
Replies: 65
Views: 54699

Re: DragonMMC Announcement.

Yep firmware is completely field upgradable. Infact during assembly the only thing I needed a special programmer for was the AVR bootloader. Once that is done the other components can all be programmed from the card. I'll try and post the updated files on the DragonMMC wiki page over the weekend. Ch...
by prime
Thu Jun 14, 2018 3:30 pm
Forum: Dragon General
Topic: Dragon Meetup 2018 - 16th June
Replies: 25
Views: 13252

Re: Dragon Meetup 2018 - 16th June

Right should hopefully be there sometime on Friday afternoon.

Cheers.

Phill.
by prime
Mon Apr 09, 2018 2:57 pm
Forum: Dragon Hardware
Topic: DragonMMC Announcement.
Replies: 65
Views: 54699

Re: DragonMMC Announcement.

sardine wrote:we are waiting for the new firmware.. I dont really care how long it takes to give time for 720k, 360k support :)
You are, sorry still waiting on testers......

Cheers.

Phill.
by prime
Wed Apr 04, 2018 3:23 pm
Forum: Dragon General
Topic: Compusense, DragonPlus and the hard disk interface ...
Replies: 6
Views: 3153

Re: Compusense, DragonPlus and the hard disk interface ...

Is that the Roy Cotes of Dragonuser and Manic Miner / Jet Set Willy fame?

Cheers.

Phill.
by prime
Mon Mar 12, 2018 2:57 pm
Forum: Dragon General
Topic: DragonMMC Update.
Replies: 15
Views: 5467

Re: DragonMMC Update.

So is it making direct calls to the ROM? or calling through the indirect table at the beginning? If the former, then it's probably going to fall over even with the updated firmware. Yes, it is making calls to internall DOS subroutines, some of them being patched in RAM to avoid that any error ends ...
by prime
Sat Mar 10, 2018 4:24 am
Forum: Dragon General
Topic: DragonMMC Update.
Replies: 15
Views: 5467

Re: DragonMMC Update.

As for The Hobbit, how tied is it to Dragondos, i.e. could it just use files directly on the DaronMMC card?Phill. Hi Phill, in fact the Hobbit calls the some DOS functions, so it is heavily tied to the DOS If I remember correct, it supports DDos1.x (Dragon Data), DDOS4.x (Eurohard) and DosPlus (S3)...
by prime
Fri Mar 09, 2018 11:19 am
Forum: Dragon General
Topic: DragonMMC Update.
Replies: 15
Views: 5467

Re: DragonMMC Update.

Might not be useful - and is only a workaround anyway - but I seem to remember with SuperDOS, periodic use of the CLOSE command ensured things were flushed to disk. It also helped avoid spurious "?NE ERROR"s. Though the current version of DragonDOS on the DragonMMC uses a patched and bugfixed versi...
by prime
Wed Feb 21, 2018 11:44 am
Forum: Dragon General
Topic: Keyboard Question....
Replies: 5
Views: 3360

Re: Keyboard Question....

Hello....This is what I thought it may be. I found that the CPU programmes the PIA when first switched on so this also could be a suspect. So I have ordered the CPU along with the PIA and IC24 connects to PB6 and PB7 so this is also on order just in case. They should arrive this week. IC26 is doubl...
by prime
Mon Jan 08, 2018 12:42 pm
Forum: Dragon General
Topic: Dragon Beta OS-9 disks
Replies: 17
Views: 9820

Re: Dragon Beta OS-9 disks

From the notes in MAME: Fixed density setting on WD2797, so density of read data is now correctly set as required by OS-9. This was the reason startup script was not being executed as Beta disks have a single density boot track, however the rest of the disk is double density. Booted completely to O...
by prime
Sat Jan 06, 2018 9:06 am
Forum: Dragon General
Topic: Dragon Beta OS-9 disks
Replies: 17
Views: 9820

Re: Dragon Beta OS-9 disks

I'm trying to get the Dragon Beta OS-9 disks from the archive running in MAME, are they known to be good and have they been tested in any way? These are all DMK images and according to the specification the maximum track size is 0x2940 but all images are actually 0x2980. MAME doesn't yet support si...