A scientific calculator is a type of electronic calculator, usually but not always handheld, designed to calculate problems in science, engineering, and mathematics...
A pocket computer is a small calculator-sized handheld programmable computer.This specific category of computers existed primarily in the 1980s. Manufacturers included Casio, Hewlett-Packard, Sharp, Tandy/Radio Shack and many more.The programming language was usually BASIC, but some devices...
is a Japanese multinational corporation that designs and manufactures electronic products. Headquartered in Abeno-ku, Osaka, Japan, Sharp employs more than 55,580 people worldwide as of June 2011. The company was founded in September 1912 and takes its name from one of its founder's first...
The Sharp PC-1401 is a small pocket computer manufactured by Sharp. It was introduced in 1983 and represents a combination of scientific calculator and computer with BASIC interpreter...
, and had better display, more RAM and better system software.
Technical specifications
CPU: Hitachi SC61860 (8 bit CMOS) 768 kHz
Memory: 8KB RAM (6863 bytes available), 72KB ROM; 32KB RAM in PC-1403H model
A liquid crystal display is a flat panel display, electronic visual display, or video display that uses the light modulating properties of liquid crystals . LCs do not emit light directly....
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.
Programming
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.
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 DEFF in run mode. The program is 66 bytes long.
10 "F" allows to start the program with DEF F
20 INPUT "N=?";N Ask for n
30 LET F=1 Set start value if F to 1
40 FOR I=1 TO N STEP 1 counts I from 1 to N
50 LET F=F*I calculates F=F*I
60 NEXT I repeats loop from line 40
70 PRINT USING "##";N;"!="; USING ;F print result - i.E. 5!=120
80 END end off program
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