Reverse engineering of the 1st Sharp calculator
12-27-2020, 09:02 PM
Post: #4
 Steve Simpkin Senior Member Posts: 748 Joined: Dec 2013
RE: Reverse engineering of the 1st Sharp calculator
(12-27-2020 08:53 PM)BruceH Wrote:
(12-27-2020 07:46 PM)celltx Wrote:  I wonder how did they use a combined multiply-divide button? Any ideas?

I think... enter first value, press [×÷], then second value then [+=] for multiply or [-=] for divide.

That is correct.
"The QT-8D uses an unusual keyboard layout. Note the combined [X÷] key. Sharp used a novel means to save a key on the keyboard (thus saving the cost, as well as decreasing the real-estate needed for the keyboard) by making the [X÷] key serve both functions. The determination as to which function the user wishes is made by the user selecting either the [+=] key to generate the result for multiplication, and the [-=] key to cause division to occur. For example, to multiply, the user would enter the first number, press the [X÷] key, then enter the multiplier, then press the [+=] key for the answer. To divide, the user would enter the dividend, press the [X÷] key, enter the divisor, and press the [-=] key to calculate the answer."

http://bensene.com/sharpqt-8d.html
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 Messages In This Thread Reverse engineering of the 1st Sharp calculator - celltx - 12-26-2020, 08:03 PM RE: Reverse engineering of the 1st Sharp calculator - celltx - 12-27-2020, 07:46 PM RE: Reverse engineering of the 1st Sharp calculator - BruceH - 12-27-2020, 08:53 PM RE: Reverse engineering of the 1st Sharp calculator - Steve Simpkin - 12-27-2020 09:02 PM RE: Reverse engineering of the 1st Sharp calculator - Paul Dale - 12-28-2020, 12:31 AM

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