This is an archive containing the data recovered from Steve Gray's Ohio Scientific Cassettes & Floppies.

Cassette folder contains files recovered from cassettes

Original Disks contain files from Steve's "OSI Disks (Original)" box
Working Disk contain files from Steve's "OSI Disks (Working)" box
Retry contains disk images from the previous two folders that had errors.
I redumped the data on a different disk drive to see if it would make a difference.
Although there are variations in the dumped data, I don't think I had any better
luck recovering data.

Some of the successes include: 
OSI Dos v3.3 with Hires support for the Mittendorf graphics board.
DAC part two
recovered file data on Pico Dos disk
Centipede, Berserk, OSI Invaders and Tiny Compiler from the cassette folder.

(WinOSI V1.6+ (included) can be used to display mittendorf hires graphics when enabled. See
System Configuration/Video - Enable Graphics option. Use F8 to toggle display on & off)
The origin is the lower left corner when using BASIC drawing commands (DRAWTO, PLOT),
but in memory, the display is 256x256 pixels starting at $8000 for 8K. The first bit 
is the upper left corner, extending for 32bytes, followed by the next row and so on.

 -Mark 5/2018  


