osiweb.org

Just a quick follow up. So obviously there is some king of repeating pattern running through the bytes being written to disk, so I decided to analyse the binary of these bytes. 00000000 = 00 10000000 = 80 01000000 = 40 00100000 = 20 00010000 = 10 00001000 = 08 00000100 = 04 00000010 = 02 00000001 = ...

Ok, I’m throwing this one out to you guys, So I’m trying to get my D&N board up and working with my C2 and MPI drive. Please see my setup for this machine below in my forum signature. When I got this D&N board, It was missing most of the RAM, and was setup for 8” drives. You can see here how I got i...

Just a thought, and probably not a good one, but have you looked at the keyboard connector? I once had a keyboard issue which turned out to be a dead pull-up resistor. This probably isn't your problem though: http://www.neoncluster.com/projects-osi/osi-challenger4pfix1.html Also Terry had an issue w...

So I'm new to OS65D and I'm struggling to figure out how it works with saving files. I know you have to CREATE a blank file and then PUT actual contents into it. Here is what I have done (using OS65D Tutorial Disk 5 in WinOSI emulator, but the OS65D Tutorial Disk 5 real machine seems the same): - 'C...

Ha, yes...It's been quite a long but enjoyable process, However on numerous occasions I've wanted the throw the machine out the window. It's been a labor of love. But really I couldn't have done it without Dave and Mikes help. Dave was instrumental in helping get the hardware working, and Mike with ...

I gave up on the D&N board in my C2 for the time being. It definitely has some WRITE issues. Instead I moved over to my C4 and now, with Mikes help, I was finally able to patch in a new track 0 on my corrupt OS65D floppy...the results: photo 5.JPG It's only taken 4+ years to get to this stage...If I...

Finally got this drive working with my OSI. Basically I left all the new MPI board jumpers intact, except I matched the area around J1 to the old board with jumpers and a cut trace. The drive however doesn't seem quite as reliable as the original, but I think thats probably just a very slight alignm...

Hi Steve, Much thanks for the reply. Recently I've been helping MK14HAK, who has been doing some amazing stuff. Not to steal his thunder as I'm sure he'll outline everything in detail. He has been working on: - Bootstrapping HexDOS method - A new version of DISKREAD that lets you select individual t...

After literally 4 years working on getting my 4P disk system running, I believe I'm almost there. Today I was able to compare track 1 of a downloaded disk image (OS65D32.img) from the net, with the contents dumped from track 1 of my corrupt OS65D disk (track 0 is corrupted on this floppy unfortunate...

Well done.
Great diagnostics!

Phil