Search found 1399 matches

by pser1
Tue May 11, 2021 5:53 pm
Forum: Dragon General
Topic: DRAM data retention time
Replies: 10
Views: 466

Re: DRAM data retention time

Oh, ok! I was mostly just mucking about, seeing what sort of thing worked if I wanted to potentially make a whole replacement motherboard. That's a long way off though, and PCB places tend to have a minimum order, so if the 512K revision works, I'll be sure to let you know. thanks a lot! I am prett...
by pser1
Tue May 11, 2021 11:45 am
Forum: Dragon General
Topic: DRAM data retention time
Replies: 10
Views: 466

Re: DRAM data retention time

a great job, congrats! These are really great news, Ciaran I would really like to add an internal 512Kb RAM expansion to my Dragon-MSX2+ That will be the icing on the cake!! I asume that it will go in the SAM socket and the SAM will go on the new module, right? You can put me down for one thanks in ...
by pser1
Sun May 09, 2021 5:57 pm
Forum: Dragon General
Topic: A DOSPlus Extender for Drivewire & CoCo-SDC
Replies: 79
Views: 30909

Re: A DOSPlus Extender for Drivewire & CoCo-SDC

Pere, you wondered if you are the only Dragon user with physical floppies, a CocoSDC and a MultiPak. Maybe you are but I will receive my CocoSDC soon and I do have a Race-electronics kind of Multipak for the Dragon ( http://worldofdragon.org/index.php?title=RACE_Computer_Expansion_Cage ). When I ge...
by pser1
Tue Apr 20, 2021 9:19 pm
Forum: Dragon General
Topic: NitrOS-9 native support for Dragon Plus
Replies: 3
Views: 543

Re: NitrOS-9 native support for Dragon Plus

Well you can grab these ones. MESS emulates Dragon Plus if you don't have one Thanks a lot! I own a Dragon-Plus and I had used it quite a lot back in the 80's but by now it is in John's case waiting for me to install it someday. By now I am far too busy with my MSX2+ project for the CoCo-Dragon mac...
by pser1
Mon Apr 19, 2021 11:41 am
Forum: Dragon General
Topic: NitrOS-9 native support for Dragon Plus
Replies: 3
Views: 543

Re: NitrOS-9 native support for Dragon Plus

hello,
pleased to hear from you again!
Any link for anyone interested in NitrOS-9 for the Dragon-Plus?
thanks beforehand
pere
by pser1
Sat Jan 09, 2021 8:01 pm
Forum: Dragon Hardware
Topic: Problems with DOS using an Y-type connection
Replies: 42
Views: 9319

Re: Problems with DOS using an Y-type connection

we are happy enough to have a hardware guru like Darren Atkinson helping us to solve awkward problems Thanks a lot, Darren, you are vey kind!! cheers By the way, I could not resist and have taken two resistor arrays of 4k7 and a std resistor 5k6 .. the only components I have right now and have added...
by pser1
Thu Jan 07, 2021 6:21 pm
Forum: Dragon Hardware
Topic: Problems with DOS using an Y-type connection
Replies: 42
Views: 9319

Re: Problems with DOS using an Y-type connection

Hello John, sorry for the delay, but it has been impossible to take the photos earlier ... I attach here the eight images we use for testing and I can asure you that vertical bars do *not* appear on the screen on any of them. But taking a photo opens a door for camera-screen effects and you will not...
by pser1
Wed Jan 06, 2021 12:49 pm
Forum: Dragon Hardware
Topic: Problems with DOS using an Y-type connection
Replies: 42
Views: 9319

Re: Problems with DOS using an Y-type connection

Hi John,
most probably I will not have the time untill late evening ...
But then I will take some photos of a few images in this resolution
BASI12 is using YJK color mode that allows for 19268 colours on screen
with 256x424 pixels resolution
cheers!
pere
by pser1
Tue Jan 05, 2021 11:42 pm
Forum: Dragon Hardware
Topic: Problems with DOS using an Y-type connection
Replies: 42
Views: 9319

Re: Problems with DOS using an Y-type connection

Hello John, this is strange, I have not this problem. What mode where you looking at? Let me know and I will try it tomorrow... The best images use to be for BASI12 which uses two frames for each image. But the other resolutions give very acceptable images too and no vertical noise bars at all ... c...
by pser1
Sun Jan 03, 2021 11:03 pm
Forum: Dragon Hardware
Topic: Problems with DOS using an Y-type connection
Replies: 42
Views: 9319

Re: Problems with DOS using an Y-type connection

hello, just to give a little hope to Dragon-MSX2+ users ... Mike Miller has found that the SDC firmware activates FIRQ for next byte very fast (10usec) and he would like to have the chance to double this value just to see what it happens ... So, I have contacted Darren Atkinson telling him Mike's id...