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The Sharp PC-1403 was a small scientific calculator and pocket computer manufactured by Sharp. It was the successor of the Sharp PC-1401, and had better display, more RAM and better system software.
CPU: Hitachi SC61860 (8 bit CMOS) 768 kHz
Memory: 8KB RAM (6863 bytes available), 72KB ROM; 32KB RAM in PC-1403H model
Display: Monochrome LCD 1 line with 24 5×7 characters
Power: 6V DC - 2 × CR2032, 0.03W
Connector (11 pins) for external devices
Integrated speaker (4kHz beep only)
Contrast adjustment wheel
Software: Simple BASIC interpreter; calculator mode
Manufacturing started in 1986
Calculations could be performed in two modes CALulator and RUN. In the former the PC-1403 would behave like a normal scientific calculator at the time with formulas entered in algebraic logic or in RUN mode BASIC statements could be entered for immediate execution and print out. The later was similar to the Direct algebraic logic employed by modern calculators.
The programming model employed was Unstructured BASIC for which the PC-1403 distinguished between RUN and PROgram mode. The later being used to enter and edit program and the former being used to execute them.
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This exhibit has a reference ID of CH14747. Please quote this reference ID in any communication with the Centre for Computing History.