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CPU SHARING 

DEVICE     

   Installation and Use                                                       

English 

                

                  CPU Sharing Device 

39121 

User's Manual 

 

 

 

 
 
 
 

Packing Checklist 

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39121 CPU Sharing Device 

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1 User's Manual 

 

Please read this manual thoroughly and follow the 

installation procedures carefully to prevent any damage 

to the 39121 and/or the devices it connects to.  

 

 

LINDY Art. Nr. 39121    

 

 

© LINDY ELECTRONICS LIMITED & LINDY-ELEKTRONIK GMBH  -  APR 2000 

English Manual                                             -1- 

 

                                                 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

English Manual                                             -2- 

 
 
 
 
 
 

1.    

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
 
 
 
 
 

 

Introduction 

The 39121 is a powerful microprocessor controlled CPU 
sharing device that enables two users to share a single 
computer. With two keyboard, mouse and monitor consoles, 
this multiuser-single tasking device is ideal for any small 
office environment. All programs,  files, data, and resources 
can be easily shared without the knowledge of network. 

 

Features 

Supports PS/2, IBM PC and Compatibles 

Supports PS/2, AT, and Auto Switchable Keyboards 

Supports SVGA, VGA, and Multisync Monitors  

No Software Required 

One Computer Shared By Two Monitor, Mouse, and 
Keyboard Sets  

Automatic or Manual Console Selection 

Screen Save Function 

Private Mode For A Privileged User 

Supports PS/2 Mouse  

 

 

 

 

Installation 

1.   Turn the computer, all monitors, and the 39121 Off. 

2.   Connect the CPU Keyboard Port at the back of the 39121 to the 

computer keyboard port with a DIN-5 male-to-male cable. 

3.   Connect the CPU Mouse Port at the back of the 39121 to the 

computer mouse port with a DB-9 male-to-female cable. 

4.   Connect the CPU Monitor Port at the back of the 39121 to the 

computer VGA port with a DB-15 male-to-male cable. 

5.   Connect the first Keyboard, Mouse, and Monitor console to the 

Console 1 ports on the 39121's rear panel. 

6.   Connect the second Keyboard, Mouse, and Monitor console to 

the Console 2 ports on the 39121's rear panel. 

7.   Set the DIP Switch switches according to your requirements. 

See the DIP Switch Setting section (below), for details. 

8.   Plug the Power Adapter that came with the 39121 into an AC 

source; plug the power adapter cable into the Power Jack on the 
39121's rear panel. 

9.   The 39121 will be ready for operation one minute after the DOS 

prompt appears on the monitor. 

Note:

 

Before turning on the computer, be sure the first port has a 

keyboard connected to it; otherwise, the error message:       

Keyboard error Press <F1> to RESUME 

appears. If this happens, connect a keyboard to the KB1 port on the 
39121's rear panel; then press function key [F1] to continue.

 

DIP Switch Setting 

The meanings of the DIP Switch Settings are 

made clear in the section on Operation, below.

 

DIP Switch Number  

Function 

ON 

ON 

5 Second Timeout  

OFF 

ON 

15 Second Timeout  

ON 

OFF 

45 Second Timeout  

OFF 

OFF 

90 Second Timeout  

ON 

Private Mode Enabled 

OFF 

Private Mode Disabled 

ON 

Screen Save Enabled 

OFF 

Screen Save Disabled 

 

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