Specifications for Casio 121-A

Manufacturer:		Casio Computer Co., Ltd.
Model Number:		121-A/AS-A
Casio Internal ID:	12G
Serial Number:		728270B
Date of Manufacture:	Early 1971
Manufactured In:	Tokyo, Japan
Original Price:		$359
Weight:			6 1/2 Pounds
Size:			13 1/2" Wide, 5 1/2" Deep, 2 1/2" High
Power Requirement:	7.6 Watts 117V AC, 50/60Hz
Display Technology:	Hitachi CD-71 Nixie Tubes
			 No Leading/Trailing Zero Suppression
Logic Technology:	Small- and Medium-Scale IC's
			 HD3112 Integrated Adder
Digits of Capacity:	12
Decimal Modes:		Floating decimal in divison only.
			No decimal point entry capability!
Arithmetic Logic:	Arithmetic
Math Functions:		Four Function
Constant:		Multiply only, double press [X] key to activate
Memories:		None
Notes:			No overflow detection/indication
			Tens complement representation of negative numbers
			Chain division requires intermediate [=+] keypress
			Also marketed as Casio AS-A and Commodore 512

Previous Machine: Casio AS-L Next Machine: Sperry/Remington Lektronic Related Machines: Commodore 1121 Casio AS-L Sperry/Remington Lektronic Casio FX-1 Casio 121-F
Back to Exhibit Back to Calculator List

Copyright ©1997-2021, Rick Bensene.