Manufacturer: BUSICOM
Model: 100DA
AKA: 120-DA
Year: Apr-1969
Display: Tubes (12)
Circuits:  
Dimensions: 295x258x108 mm
Power type:  
Origin: Japan
S/N:  
Owner: Many thanks to:
JANSSENS André from Belgium for the info.

 

Case: 
Color case: 
Color keyboard: 
Weight: 
Voltage selection: 
Power consumption: 
Working conditions: 
Printed Circuit Boards (PCB's): 
Memories: 
Memories indication: 
Prog. steps: 
Decimal point handling: 
Rounding: 
Calculation overflow indication: 
Input overflow indication: 
Divide by Zero indication: 
Square root of negative value indication: 
Negative value indication: 
Auto constant function by pressing twice: 
Auto Power-off: 
Display details: 
Keyboard details: 
Printer: 
Printer roll: 
Printer inkt-ribbon: 
Extra features/remarks:
 
 
 

Initial price: 
Overall quality rate (1-10): 
OEM-copies: 
Other sources of info: 
Advertisements/Publications: 


Beige.
Black.
3000 g

7 W
0 to 40 degrees C

None.
N/A.
N/A.
Via keyboard switch, '0-1-2-3'-positions. 

All digits indicating Zero.
All digits indicating Zero.

N/A.
Minus lamp.
Yes.



None.
N/A.
N/A.
Identical to BUSICOM: 120DB
Calcultion speed:
-Addition and substraction: 0.01s
-Multiplication: 0.25s
-Division: 0.3s

-

 

Example

Operation

Result

Addition / Subtraction:
1.23+9.872-56.78

[Decimal Point switch]=3
[C] 1.23 [+] 9.872 [-] 56.78 [=]

-45.678

Multiplication:
123x45.6x7.89

[Decimal Point switch]=3
123 [X] 45.6 [X] 7.89 [=]

44,253.432

Division:
110/3.3/3

[Decimal Point switch]=3
110 [division] 3.3 [division] 3 [=]

11.111

Constant calculation:
123+45
721+45
456+45

[Decimal Point switch]=0, [K Switch]=On
123 [+] 45 [=]
721 [=]
456 [=]


168
766
501

 

       

(I love this calculator)