archive.worldofdragon.org

As your board has a 'special' DOS that uses some code from $E000 on to talk to the AVR, I am sure that we could reduce some 'not needed' DOS commands and fill this area with the code made to send/receive data via AVR. I would like to work on that 'mini-DOS' if you don't mind. Just will need the asm...

People on the FB group will already have seen this.....

Should be arriving mid to late afternoon on Friday, so deffo up fro food / beer on friday night, if anyone else will be in Cambridge.

Cheers.

Phill.

Hi all,

Does anyone know if the Dragon disk driver source code is available for flex?

Cheers.

Phill.

Somthing to remember when comparing CoCoSDC and DragonMMC is that IIRC CoCoSDC emulates the floppy controller hardware, DragonMMC does not. In fact the early versions of DragonMMC had no disk support at all. DragonMMC has the following memory map when switched on, all in map 0 : $0000-$7FFF Normal 3...

he also was working on an RGB board for the D32 so he should know how to resolve your issue. I was actually the one developing the RGB borard, though Bas was beta testing. Project was shelved as couldn't get it to work to my satisfaction, and board was a bugger to assemble. Prime on here knows him ...

Vyper68 wrote: This issue 2 is really early too the date code for the chips are week 44 1982 there are only 8 OKI chips as well.

That sounds like one of the boards using "half good" 64K chips. Those are the easiest boards to upgrade to 64K.

Cheers.

Phill.

sardine wrote:Hi Phill

is there a changelog ??

yeah was going to upload one, Simon any chance of getting .txt added to the list of allowed file extensions.

Cheers.

Phill.

robcfg wrote:I’ll try to look at it during the weekend as I still have the machine with me.

Excelent, thanks Rob.

Cheers.

Phill.

Sorry to resurrect this old thread..... I'm just trying to work out the complete circuit for the addon board so that we can maybe replicated it. I have it mostly traced from robcfg's scans, however there are a few things I can't work out..... Under the 6847 there are a pair of pads linked on the bot...

Right the 1.1 Firmware is available from the DraonMMC wiki page :

http://www.archive.worldofdragon.org/in ... MMC_SDCard

Cheers.

Phill.