Toshiba BC-815

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Calculators: Handheld: Toshiba BC-815

	Size (approx):	83mm (max) x 170mm x 26mm (max) (w,h,d) Weight 188g excluding batteries and with strap, 270g including.
	Power:	6.0V DC, 4xAA size batteries. Also accepts adapter (BH-104/BH-108 for 100-120V, or BH-105/BH109 for 200-240V, 5V, 0.5W) through top end left hand side socket. Manganese battery life is quoted as 6hrs, alkaline as 20 hrs.
	Case:	Sturdy feeling black plastic with brushed aluminium front and button surround. Painted logo that has survived well in this example. Large upper section to hold the four AA batteries and over-sized green plastic display cover. Top left hand side has a hook for the plastic strap.
	Display:	8 digit green fluorescent (plus one for minus sign and error flag)
	Features:	Basic memory function with percentages and square root
	Age:	Date of purchase 15 August 1975.
	Manufacturer:	Toshiba (Tokyo Shibaura Electric Co. Ltd.). Made in Japan, Serial number F61949
	Comments:	Lovely condition high quality-feeling calculator. Leatherette case has a hole so that the strap can poke through and be held. It also has popper closing at the top. Top-heavy appearance due to the large display cover and battery storage area means that the function button only occupy half of the front area. Orange grey and black buttons are subtle but nice. Button action is squishy but surprisingly positive. Battery compartment has a ribbon to aid extraction.

Components:
Boards:
Construction:

Logic comments:	Clear entry (CE) clears the last number entered, operators are corrected by just pressing the revised one.
	An error results in the display "E" in the ninth digit and is not recoverable
	Minus sign is held in the ninth digit allowing full eight digit negatives.
	Indication of memory store is by the ninth decimal point lighting up (M)(-) to zero also cancels memory, memory overflow is ignored.
	Rooting a negative gives "E" and zero
	Entering a nine digit number causes "E" to be displayed in the ninth digit which is not recoverable on first number entry
	There is a "battery alarm lamp" that lights the top right hand vertical segment of the ninth digit - thereby draining the batteries even more!
	The floating decimal gets stuck on zero-result for all calculations; 1.000 -1 = 0.000, this is not held in memory, how odd!
	It has an automatic constant

	This bold box on the left is about the same size as the calculator at 103mm x190mm x 45mm. Both long sides contain stickers with the model number and serial number and the strap line "Toshiba Instant Genius".		A brief 8pp two colour manual in English only, with the occasional shaky translation into English. Printed in Japan with no reference numbers or date. The calculator also came with a similar sized Service Warranty Card, the lower (missing) section of which was posted to their agent; ADM Services Ltd in Sunbury on Thames. Ref: 1015702-1 M. Om 356 507 Ha