archive.worldofdragon.org

John's module allows us the switch from the std video output (MC6847) to the new V9958 just issuing a POKE The address is $ff5e for setups with a multiplack (MPI) or $ff7e for setups with the oojamaflip instead Well, this poke works perfectly when emulating a Dragon, but acts exactly inversely when...

prime wrote: ↑Mon Nov 08, 2021 2:51 am anything anyone wants me to bring?

The usual ROM dumping stuff. I'll be there Saturday only.

Cheers, Nigel

robcfg wrote: ↑Tue Jun 06, 2017 2:54 pm Aaaaand, I've also just uploaded the pictures of the modem cartridge.

I think that Phill mentioned that he had the eprom for that board. If that's the case, could you please upload it here so I can add it to the Modem Cartridge page?

Did the ROM from the modem cart ever materialise?

I'd be surprised if it doesn't respond to other addresses apart from $FEFF. I'm going to check on this asap. I found out that READING $feff switches the expansion board to slot 2, but didn't detect any other strange behaviour yet. I'm only questioning it as the review in Dragon User mentions POKEs,...

I uploaded the pictures from an eBay auction, but sadly I don't have it. Otherwise it would have been dumped by now :mrgreen: By the way, isn't "Sideways Rom" a very BBCish term? That's unfortunate, was hoping it may have been found over the years since the pictures were uploaded. Yeah, the term Si...

So did anyone here get the Sideways ROM cartridge? Looking at the wiki at http://archive.worldofdragon.org/index. ... sROM02.JPG there's a ROM in there that I haven't seen dumped.

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 ...

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.

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 ...

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...