JPH02111848U - - Google Patents

Description

[Brief explanation of drawings]

The drawing shows one embodiment of this invention.
Figure 2 is a block diagram showing the circuit configuration, Figure 2 is a diagram showing the internal configuration of the calculation register section, Figure 3 is a diagram showing the display state according to key operations, and Figures 4 and 5 are diagrams showing the internal configuration of the arithmetic register section.
The figures are flowcharts showing the respective operations. DESCRIPTION OF SYMBOLS 1...Key input part, 1a...Numeric key, 1b...Operator key, 1c...Right shift key, 2...Control unit, 3...
Arithmetic register section, 4... Arithmetic section, 5... Display control section,
5a...Display register, 6...Display section.

Claims (1)

[Scope of Claim for Utility Model Registration] When a computation is performed with the maximum number of display digits (N digits) on a small electronic calculator with double precision arithmetic function,
a judgment means for judging whether the number of digits of the operation result exceeds the maximum display number of digits; and when this judgment means judges that the number of digits of the operation result exceeds the maximum display number of digits, double-length operation (2N
an arithmetic means for performing a digit operation), and when the above-mentioned double-length operation is executed by this operation means, the operation result of the lower digit part of the above-mentioned double-length operation is displayed in response to the operation of a specific key that instructs another function. A double-length arithmetic device comprising: a display control means;