osiweb.org

Some people here have been re-building floppies from floppy image files. This involves splitting the image up into track and sector files and then serially transferring them to a host and writing the track and sector chunks one by one. The splitting up task is somewhat tedious, so I wrote a program ...

Here is the link to the USB-TTL device I used. Its a bit more than others, but has a more compatible connector on it.

http://www.ebay.com/itm/371288534219?_t ... EBIDX%3AIT

/Jeff

Also complete. (I don't ever plan to connect 8" drives.) I do plan to add the motor control IC shortly. /Jeff

...continued from last post. 32 Chars per line http://i1056.photobucket.com/albums/t361/chaosdesignsG5/OSI%20stuff/32%20Char%20Output_zpsctfomah0.jpg 64 Chars per line http://i1056.photobucket.com/albums/t361/chaosdesignsG5/OSI%20stuff/64%20Char%20Output_zpssqefjko8.jpg C1P http://i1056.photobucket....

...continued from last post.

Aardvark Video Board Bottom


New ROMS


continued...

.....continued from last post Top Mods 2 http://i1056.photobucket.com/albums/t361/chaosdesignsG5/OSI%20stuff/Board%20Top%20Mods%201_zpsovnud2jl.jpg Top Mods 3 http://i1056.photobucket.com/albums/t361/chaosdesignsG5/OSI%20stuff/Board%20Top%20Mods%203_zpsvnjnafdy.jpg Aardvark Video Board Top http://i1...

Pictures as promised. Bottom Mods 1 http://i1056.photobucket.com/albums/t361/chaosdesignsG5/OSI%20stuff/Board%20Bottom%20Mods%201_zpsbued1j6r.jpg Bottom Mods 2 http://i1056.photobucket.com/albums/t361/chaosdesignsG5/OSI%20stuff/Board%20Bottom%20Mods%202_zpsip1qfpg4.jpg Top Mods 1 http://i1056.photob...

For the last week or so, I have been trying to get a floppy drive working with the 610. As it turns out, (after MANY hours of testing and hair-pulling) I discovered that I made a mistake when building it. The symptoms were that the 6821 was just not doing anything! No input, no output, nothing. I fi...

Hi Bill, I tested the Vcc and Gnd Pins with the unit just connected to the host computer, and there is no voltage across them. Basically, the unit provides a USB connection for a device, and needs to be powered by that device. (But your concerned are much appreciated!) Here is the circuit info sheet...

I wanted the device to be separate from the Superboard and connect by a cable. J3 was the perfect candidate. TX Data and Ground are already present and there are 3 unused pins. I selected Pin 12 for +5V and Pin 8 for TX DATA, and installed some jumpers on my Superboard. Here is the power jumper.... ...