Accuron Executive

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Calculators: Handheld: Accuron Executive

		Size (approx):	68mm x 115mm x 22mm (w,h,d) Weight 76g excluding batteries
		Power:	9V DC, 1 x PP3 size battery. Does accept an adapter (undefined but 2mm plug) through socket on the top side on the far left. Battery compartment has a sticker recommending alkaline batteries for longer usage. The back sticker states that battery must be removed if AC adaptor is used.
		Case:	Stylish two-piece smooth black plastic case which has its front half covered by wrap-around brushed aluminium panel. Top and bottom panels are heavily ridged. Display escutcheon is show through plastic painted silver for the logo and name. Purple display filter gives a clear display but the bubble lens limit the angle of view quite a lot. Keys are squishy and springy but my example exhibits bad bounce.
		Display:	8 digit (no ninth) bubble lens red LED
		Features:	Standard four functions, percentages, sign change and four function memory.
		Age:	1976
		Manufacturer:	No manufacturer's name or model number. Serial No. (in battery compartment) B28043, made in Malaysia.
		Comments:	Futuristic design with nice purple display filter. Very compact, makes me believe this was designed for the "handbag" market. Sound logic let down by only seven digit negative numbers. Absolutely no other components than the chip and display. Original case is just about big enough, made from soft black plastic with an open top and half-moon cut-outs. Branded version of the Universal Executive.

Components:	1 x cpu: Texas TMS0972NL KDS 7632 (date code week 32 of 1976) 28 pin DIL 1 x 8 digit bubble lens red LED with additional full length magnifier; TIL395--8 7634 (date code week 34 1976) 0 x transistor 0 x diodes 0 x capacitors 0 x resistor arrays 0 x resistors 0 x transformer
Boards:	The keyboard assembly attached to the front via four screws and to the main cpu board (ref TMS0972 7/931A) by 15 long stiff flat copper wires.
Construction:	Very gently squeeze in the front panel and gently lift the back off.

Logic comments:	(CE) is used once to cancel the last number entered and (C) to clear the whole calculator.
	There is automatic constant on all four functions
	Input overflow is suppressed, inputting a ninth digit is ignored
	Negative numbers are shown with a "-" in the immediate left hand digit. As there is no ninth digit you are limited to seven digit negative numbers. Type in an eight digit number and press (+/-) result in an error which is recoverable using (CE)
	The change sign key "(-)" can be used in mid-number entry
	Divide by zero shows a flashing "0" digit and is recoverable using (CE)
	Overflow shows the result flashing rapidly and is recoverable using (CE)
	There is no indication of memory - you have to remember it

The box pictured on the left does not mention Accuron or the model number (which may be on the top end that is missing on this example).

At 70mm x 117mm x 25mm (w,h,d) it is just about the size for the calculator. Printed in yellow and black this box is obviously meant to be as generic as possible and I would not be surprised if other calculators used it too.