Yo-Yo Duck is a series of testing utilities for the Apple II and IIGS. 

The tests include:

- Monitor test
- Drive cleaner
- disk drive/file test
- Ensoniq sounds test (GS)
- Imagewriter and other printer tests
- joystick/paddle test 
- keyboard test
- speaker test

and others.  This package is currently classified as shareware; please see
the file on the disk regarding sharware fees.

There are two disks to this package:  yoyoduck1 and yoyoduck2.
                                                                         10:25PMDISK FUNCTIONS                                                                 
                                                                               
Prefix=/BLANK/                                                                 
                                                                               
C:Catalog                                                                      
R:Read TXT file                                                                
W:Write TXT file                                                               
E:Erase file                                                                   
P:Prefix                                                                       
S:Slot                                                                         
D:Drive                                                                        
L:Load BIN file                                                                
B:BIN file write                                                               
                                                                               
                                                                               
Disk command -->