Manufacturer: BUSICOM
Model: 120DC
AKA: exec, 120-DC
Year: 1971
Display: Tubes (12)
Circuits: MOSTEK: MK6010
Dimensions: 209x145x54 mm
Power type: 6V-4xD
Origin: Japan
S/N:  
Owner: Many thanks to:
JANSSENS André from Belgium for the info.

 

Feature  

Description 

Case:  

 

Color case:  

Black.

Color keyboard:  

White.

Weight:  

1000 g

Voltage selection:  

 

Adapter:  

 

Power consumption:  

1 W

Working condition:  

0 - 40 degrees C

Printed Circuit Boards (PCB's):  

Memories:  

0

Memories indication:  

N/A 

Prog. steps:  

N/A

Decimal point handling:  

Via switch on keyboard '0-2-3-4'-position.

Rounding:  

 

Calculation overflow indication:  

Auto locks to prevent further calculation, all digits display 0
Touching
[C] clears the overflow.

Input overflow indication:  

 

Divide by Zero indication:  

 

Square root of negative value indication:  

N/A

Negative value indication:  

Via first digit (left from the others).

Constant function:  

 

Auto Power-off:  

No 

Display details:  

 

Keyboard details:  

 

Printer:  

None

Extra features/remarks:  

One set of disposable batteries will give app. 8,000 calculation
or 12-15 hours of countinuous operation.
'Bat Low'-indicator light when battery level is low,
at this point the batteries must be replaced,
calculation accuracy cannot be guaranteed when 'Batt Low' warning.
Unnecessary '0'-digits ahead of the numeral display are suppresed.
Setting the power switch ON, auto opens the display hood, closing the
display hood turns off the machine.
The carrying handle is easy slid out for carrying and fits under the machine
when in closed position.

Initial price:  

 

Overall quality rate (1-10):  

 

OEM-copies:  

 

Other sources of info:  

TAKAHARU

Advertisements/Publications:  

 

 

Example

Operation

Result

Mixed calculation:
(9x8x7-28)/(6x7)+12.389

[Decimal Point swicth]=4
9 [x] 8 [x] 7 [+=] 28 [-] [division] 6 [division] 7
[+=] 12.389 [+=]



23.7223