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The Casio FX-781P computer

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Technical specifications
RAM (total)	:	2 / 4 Kb (0 to 1 ramcard of 2 Kb)
RAM available	:	1,504 / 3,552 bytes
ROM	:	?
CPU	:	VLSI specific
Text screen	:	1 line of 24 characters
Graphic screen	:	No
Sound	:	Dual tone beep (high, low)
Size	:	142 x 142 x 9 mm (opened)
Weight	:	167 g. with batteries
Year	:	198?
Power	:	2 CR-2032 + 1 CR-1220 lithium batteries
Extensions
Memory	:	OR-2    2 Kb
Printer	:	FP-12   Thermal technology (using the SB-2 link)
		FP-12S Thermal technology (using the SB-2 link)
		FP-12T Thermal technology (using the SB-2 link)
		FP-40   Thermal technology (using the SB-42)
Storage	:	FA-3     External tape interface (using the SB-2 link)
		FA-5     External tape interface
		FP-40    External tape interface (using the SB-42)
Communication	:	SB-2      Link cable