Samiksha Jaiswal (Editor)

Sharp PC 1403

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Type  Pocket computer
Entry mode  Infix, BASIC,
Display size  24 characters
Introduced  1986
Display type  LCD dot-matrix
Sharp PC-1403
Processor  CPU: Hitachi SC61860 (8-bit CMOS)

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.


Technical specifications

  • CPU: Hitachi SC61860 (8-bit CMOS) 768 kHz
  • Memory: 8 KB RAM (6863 bytes available), 72 KB ROM; 32 KB RAM in PC-1403H model
  • Display: Monochrome LCD 1 line with 24 5×7 characters
  • Power: 6 V DC - 2× CR2032, 0.03 W
  • Connector (11 pins) for external devices
  • Integrated speaker (4 kHz beep only)
  • Contrast adjustment wheel
  • Software: Simple BASIC interpreter; calculator mode
  • Matrix calculations
  • Manufacturing started in 1986.


    Calculations could be performed in two modes CAL 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 PRO mode. The later being used to enter and edit program and the former being used to execute them.

    Programming example

    Here is a sample program that computes the factorial of an integer number from 2 to 69. It can be called by pressing DEF F in run mode. The program is 66 bytes long.


    Sharp PC-1403 Wikipedia