Search found 245 matches

by prime
Wed Apr 04, 2018 3:23 pm
Forum: Dragon General
Topic: Compusense, DragonPlus and the hard disk interface ...
Replies: 6
Views: 1682

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: 2901

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: 2901

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: 2901

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: 1806

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: 3630

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: 3630

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...
by prime
Sun Dec 03, 2017 12:18 pm
Forum: Dragon General
Topic: DragonMMC Update.
Replies: 15
Views: 2901

Re: DragonMMC Update.

sardine wrote:Hi Phill

loving this MMC board, have you had chance to look at 360k & 720k VDK disk size support ??
Yeah there is a firmware update in the works, just needs a little more work on it.

Cheers.

Phill.
by prime
Sat Dec 02, 2017 3:09 pm
Forum: Dragon General
Topic: DragonMMC Update.
Replies: 15
Views: 2901

DragonMMC Update.

Hi all, Just to let everyone know that I'm almost at the end of the first run of DragonMMC boards. So once I have exhausted them I will be unable to take any more orders for the short term whilst I get some more boards / components / decide how I want to proceed from this point onwards. Just to reas...
by prime
Tue Nov 07, 2017 12:54 pm
Forum: Dragon Hardware
Topic: DragonMMC Announcement.
Replies: 65
Views: 37763

Re: DragonMMC Announcement.

Hi all,

I have a firmware update almost ready for release, which will hopefully fix the issue with disk images, will hopefully be in the next week or so.

Cheers,

Phill.