Lloyd's Accumatic 30

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Calculators: Handheld: Lloyd's Accumatic 30 (aka EH-9036)

		Size (approx):	92mm x 140mm x 29mm (max) (w,h,d) Weight 164g excluding batteries
		Power:	6V DC, 4 x AA size batteries. It accepts an adapter (6V DC 250mW, series 255C) through socket on top side to the far right. The on/off switch is located on the top side in the middle.
		Case:	Made from a three-piece case, the lower section is smooth dark brown, the middle is smooth beige and the front is matt dark brown. A neutral plastic display filter is flat and flush and has the model number and minus reminder printed in white text. Below this is a black printed metallic sticker with the brand name that sits in its own recess. Keys are squishy but work very well with a fast return bounce. Extensive example panel on the back.
		Display:	8 digit blue VFD with and additional point red LED for negative indication.
		Features:	Standard four functions with percentages
		Age:	1975
		Manufacturer:	Lloyd’s EU-0010-0011, made in Taiwan, Republic of China, serial number 2-61460.
		Comments:	Sits comfortably in the hand with nice smooth sides, but slightly oversized basic calculator. Archaic colour scheme for the keys fits with the brown and orange themes of the 1970s. The logic is poor as there is no indication of overflow, no recovery and the negative zero bug. However, the discrete LED is a nice early artefact. There were at least three versions of the model 30 - another can be seen at Lloytron 30.

Components:	1 x cpu: Hitachi HD3633 5B21 (February 1975), 40 pin DIL, 0.6" width black plastic 1 x 8 digit VFD: single tube round face 1 x pin-point red LED 3 x transistors 6 x diodes 7 x capacitors 7 x resistors 2 x resistor arrays 1 x transformer
Boards:	The keyboard assembly (152-10) rests on top of the battery compartment and is joined to the lower cpu board (800PK-E) via 11 strong wires.
Construction:	Held together by internal lugs only, there is a leverage slot at the top that is off little help. Do not use metal objects to prize it apart or damage will result. Pop the lugs gently by squeezing in the back section. The front will eventually lift off.

Logic comments:	(CE) is used to cancel the last number entered and (C) to clear the whole calculator.
	There is automatic constant on multiply and divide only
	Input overflow is suppressed, inputting a ninth digit is ignored
	Negative numbers are represented by a single red LED just below the display thereby allowing full eight digit negative numbers. This LED also lights up whilst inputting a number to subtract.
	Overflow shows the result only with no indication of a problem other than the calculator hooks up and is not recoverable.
	Divide by zero shows zero only (with no decimal point) and is not recoverable
	It suffers the negative zero bug: key in (1)(-)(2)(=) to give “-1” then (+)(1)(=) will give “-0”

	With the front removed you can see that the construction is much like many of the Decimo Vatman series with the keyboard resting on the battery compartment. You can just see the LED to the bottom right of the main display tube. It is not supported by anything other than its own wires, which have been bent to position it. Very similar to the Elite 3001 and Decimo Vatman Black.