Sharp PC-1403

Sharp PC-1403

Sharp PC-1403 handheld BASIC computer
Type	Pocket computer
Introduced	1986
Calculator
Entry mode	Infix, BASIC,
Display type	LCD dot-matrix
Display size	24 characters
CPU
Processor	CPU: Hitachi SC61860 (8-bit CMOS)
Frequency	768 kHz
Programming
Programming language(s)	Unstructured BASIC
User memory	8 KB
Firmware memory	72 KB
Interfaces
Ports	1x proprietary (11 pins)
Other
Power supply	2x CR2032
Power consumption	0.03 W

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.

Calculator

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.

Programming

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.

10 "F"                                 ''allows to start the program with DEF F
20 INPUT "N=?";N                       ''Ask for n
30 LET F=1                             ''Set start value of 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 of program

Sharp Corporation
Divisions and subsidiaries	Current iDeep Solutions Corporation Sharp Electronics Corporation Sharp Manufacturing Systems Corporation Sharp Solar Takaya Defunct Optonica1
Shareholdings	Pioneer Corporation (14%)
Products	Calculators Sharp EL-8 Sharp EL-500W series Sharp EL-5120 Sharp QT-8B Sharp QT-8D Computers Notebooks Sharp PC-5000 Sharp Actius RD3D PCs Sharp MZ Sharp X1 (Sharp X1 games) Sharp X68000 (Sharp X68000 games MDX) Pocket and handheld Sharp PC-1211 Sharp PC-1251 Sharp PC-1350 Sharp PC-1401 Sharp PC-1403 Sharp PC-1450 Sharp PC-1500 Sharp PC-1600 Sharp PC-E220 Sharp PC-E500S Sharp Wizard Sharp Zaurus Mobile phones Sharp GX15 Sharp GX25 Sharp GX29 Sharp GX33 J-SH04 Sharp SH906i Sharp SX862 Sharp Aquos Crystal Televisions and displays Sharp Aquos C1 NES TV Quattron SF-1 SNES TV Other Famicom Titler Twin Famicom Sharp Viewcam VL-Z800U
People	Tokuji Hayakawa
Places	Abenobashi Terminal Building Tower Abeno-ku Blue Man Group Sharp Aquos Theatre Yaita
1Now integrated into other Sharp divisions or business groupings Category Commons