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


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