Texet 880

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Calculators: Handheld: Texet 880 Executive

	Size (approx):	77mm (max) x 135mm x 22mm (max) (w,h,d) Weight 86g excluding batteries
	Power:	9V DC, 1 x PP3 size battery. Also accepts an adapter (undefined) with a socket is on top side on the right.
	Case:	Slim and square shaped two-piece case in black and light grey (almost silver) matt plastic. Two aluminium panels for the display and keyboard surround which are both printed; one in black the other in blue. The red plastic display filter is very slightly angled. Display viewing angle is rather limited. Blue printing tries to gather the memory and cancel keys apart from the function and numeric ones. Solid enough calculator. The on/off switch is on the right hand side about where the display is. Keys are hollow-sounding click type but work well enough.
	Display:	8 digit red LED with bubble lens (no ninth digit)
	Features:	4 function calculator with percentages, change sign (CS) and four function memory
	Age:	1978
	Manufacturer:	Texet. Made in Hong Kong, Serial Number A088634.
	Comments:	Quite cheerful colour scheme. One of two calculators to say they are a Texet 880. The on/off switch on the right hand side, midway, is down for on, which is confusing. Same calculator as the Satek 8M.

Components:
Boards:
Construction:

Logic comments:	The (CE) button is used to clear last entry of a number and (C) to clear the whole calculator. (CA) appears to clear all, even the memory.
	Overflow on number input is suppressed, typing in a nine digit number ignores the ninth digit.
	An overflow error is flagged with the result flashing. Number is recoverable using (CE)
	Divide by zero results in a flashing "0." which is also recoverable.
	There is automatic constant on all functions
	There is no indication of memory store - you have to remember it.
	To see a display anomaly try (1) (-) (0.0000000) (=), this gives "1.00000000" which keeps the trailing zeros until you multiply or divide by something.
	Negative numbers are flagged by a "-" sign in the immediate left digit, limiting you to seven digit negative numbers. If you type in (1)(2)...(8)(CS), this will result in an error.

880 Box

Measuring 160mm by 80mm by 33mm this bold yellow and black Texet box stands out in a shop display very well. Not much bigger than the calculator means there were few extras sold with this.

Made in Hong Kong