Search found 96 matches

by Pernod70
Tue Jan 19, 2021 1:13 am
Forum: Dragon Hardware
Topic: Dragon Beta
Replies: 7
Views: 628

Re: Dragon Beta

The Fairlight is an intriguing machine - basically a 64K 2x6809 system running OS/9 - and talking to another eight 6809 machines sharing a backplane, each with another 64K, each one being a sound channel. I have schematics somewhere ... anyway, going off an a tangent here :) The CMI IIx is already ...
by Pernod70
Sat Dec 19, 2020 12:57 pm
Forum: Dragon Hardware
Topic: Dragon Beta
Replies: 7
Views: 628

Re: Dragon Beta

Thanks both, I'll keep you posted. I really think it's a missing interrupt issue as both CPU's are currently sat on different SYNC's during floppy transfer.
by Pernod70
Fri Dec 18, 2020 12:53 pm
Forum: Dragon Hardware
Topic: Dragon Beta
Replies: 7
Views: 628

Re: Dragon Beta

I'll attach my research.txt file which may proove helpfull. Thanks for those, the area of interest is: 2005-05-24 I think I have just realised how the two processors interact, at startup the halt line on the second CPU is active, so the first cpu takes over and initialises the hardware, since they ...
by Pernod70
Mon Dec 07, 2020 11:43 pm
Forum: Dragon Hardware
Topic: Dragon Beta
Replies: 7
Views: 628

Dragon Beta

The emulation of the Beta last worked in MESS 0.138, which was 10 years ago! The MAME framework has advanced significantly since then but the Beta driver has been left to rot. I'd really like to get the Beta emulation working again, but will require more or less a rewrite to make use of the latest M...
by Pernod70
Sat Jun 27, 2020 3:46 pm
Forum: Dragon General
Topic: MAME - Dragon 200-E
Replies: 19
Views: 7962

Re: MAME - Dragon 200-E

Finally, I think I'm done with the external character ROM board:
Inverse
Inverse
0008.png (13.92 KiB) Viewed 1658 times
Normal
Normal
0009.png (13.81 KiB) Viewed 1658 times
On the original board I see LK1 controls the INV input. Is INV not software selectable like on other models?
by Pernod70
Fri Apr 10, 2020 3:11 pm
Forum: Dragon General
Topic: MAME Emulation
Replies: 95
Views: 36930

Re: MAME Emulation

I know that there is a chance you will be adding support for the the V9958 on the Dragons (using the Wordpak2+ module) Once we have the MPI, we could install the FDC, WP2+ and PSG to get a powerful Dragon-MSX2+ computer. The Wordpak2+ is already in my development build, but not quite ready for rele...
by Pernod70
Fri Apr 10, 2020 12:48 pm
Forum: Dragon General
Topic: MAME Emulation
Replies: 95
Views: 36930

Re: MAME Emulation

If it is mandatory to use tape files, I would rather prefer to wait for the MultiPack to be implemented so that we could have at the same time the FDC and the PSG as on my actual setup ... I'll try to get the MultiPak in for the next release. The reason it's not currently available to Dragon machin...
by Pernod70
Wed Apr 08, 2020 1:08 pm
Forum: Dragon General
Topic: MAME Emulation
Replies: 95
Views: 36930

Re: MAME Emulation

When I bought that module from him, I erased the flash so that it simply gets connected and then I can use the hardware using my own programs on my Dragon 64 Another chance could be avoiding the module to autostart ... first time I put a bit of tape to do so but maybe there is a soft way to do the ...
by Pernod70
Wed Apr 08, 2020 12:29 pm
Forum: Dragon General
Topic: MAME Emulation
Replies: 95
Views: 36930

Re: MAME Emulation

If anyone wants to use the new CoCo PSG cartridge emulation that was introduced in MAME 0.220 then you'll need the firmware that's attached. Just place the zip in your mame/roms folder.
by Pernod70
Fri Apr 03, 2020 10:42 pm
Forum: Dragon General
Topic: Dragon Beta OS-9 disks
Replies: 17
Views: 6574

Re: Dragon Beta OS-9 disks

I remember seeing some schematics for the keyboard and floppy sections, but can't find them anywhere. See http://www.dragondata.co.uk/tech/circuit-diag/beta/index.html (You have to click on the pictures, and not on the text links.) Thanks, just couldn't remember where I'd seen them. I presume no ot...