---
title: Sharp PC-1403 (H)
categories:
- Computers
types:
- Pocket
origins:
- Japan
years:
- '1986'
cpus:
- Sharp CMOS SC61860
params:
  name: PC-1403 (H)
  image: /media/museum/photos/sharp_pc1403h_system_s1.jpg
  company: /companies/sharp
  company_name: Sharp
  specs:
  - label: NAME
    value: PC-1403 (H)
  - label: MANUFACTURER
    value: Sharp
  - label: TYPE
    value: Pocket
  - label: ORIGIN
    value: Japan
  - label: YEAR
    value: '1986'
  - label: BUILT IN LANGUAGE
    value: Sharp BASIC interpreter
  - label: KEYBOARD
    value: 77 keys, QWERTY calculator type with numeric key-pad and math function keys
  - label: CPU
    value: Sharp CMOS SC61860 (8 bits)
  - label: SPEED
    value: 768 kHz
  - label: RAM
    value: 'PC-1403: 8 KB - PC-1403H: 32 KB'
  - label: ROM
    value: 72 KB
  - label: TEXT MODES
    value: 1 line x 24 chars. (LCD screen), 5x7 dot matrix
  - label: GRAPHIC MODES
    value: None
  - label: COLORS
    value: Monochrome LCD
  - label: SOUND
    value: CPU controlled piezo buzzer, fixed frequency and duration via BASIC statement
  - label: SIZE / WEIGHT
    value: 170 (W) x 72 (D) x 9.5 (H) mm / 150 g (with batteries and hard cover)
  - label: I/O PORTS
    value: Proprietary 11-pin expansion bus
  - label: POWER SUPPLY
    value: 6 volts, 2 x CR 2032 lithium cells
  - label: PERIPHERALS
    value: CE-126P thermal printer and tape interface
  tabs:
  - photos
  - emulators
  - links
  photos:
  - title: LARGE VIEW
    subtitle: ''
    text: ''
    image: /media/museum/photos/sharp_pc1403h_system_s2.jpg
  emulators:
  - title: POEMS
    url: http://sourceforge.jp/projects/poems/
    platform: Unix / Linux
    text: PC-12xx, 14xx & 13xx emulator
  - title: PockEmul
    url: http://pockemul.free.fr/
    platform: Multiplatform
    text: Emulates nearly all Sharp pocket computers!
  links:
  - title: Web Wiz CAPTCHA
    url: http://www.webwizcaptcha.com
    text: ''
  comments:
  - author: wintermute (USA)
    date: Wednesday 1st November 2017
    text: 'The matrix functions \*can\* be used in BASIC mode, see: http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv017.cgi?read$110792'
  - author: Dan Walker (USA)
    date: Thursday 2nd June 2016
    text: I remember not only did I make a program that foul display Hundreds of Formulas based on a code of input, but I hit the programming from being listed. I wished I remember how I did this, but eventually I did not really use this to cheat as I had intended on my SAT
  - author: Jaroslav M. (Slovakia)
    date: Tuesday 21st May 2013
    text: I wrote my first game using this computer.
  - author: Suljo (Bosanac)
    date: Monday 18th February 2013
    text: |-
      I have one , and it is very useful. First my contact with this (PC-1403H) calculator, impress me.\
      I have about 17 programs loaded in memory of this machine.
  - author: Stephen Page (UK)
    date: Wednesday 25th April 2012
    text: I will admit to almost cheating in an examination. I was worried I wouldn''t remember some complicated information, so I programmed it into one of these things but by the time I had done all that....I had memorised it and never used the machine in the exam, LOL
  - author: Boban (Srbija)
    date: Tuesday 6th March 2012
    text: Is there any program that I put in a matrix calculator Sharp PC-1403H?
  related:
  - /museum/sharp-pc-1210-1211-1212
  - /museum/sharp-pc-1245
  - /museum/sharp-pc-1250-pc-1251
  - /museum/sharp-pc-1260-pc-1261-pc-1262
  - /museum/sharp-pc-1401-pc-1402-pc-1421
  - /museum/sharp-pc-1500-pc-1500a
  - /museum/sharp-pc-2500
  oc_id: 1173
  source:
    url: https://web.archive.org/web/20230609154930/http://www.old-computers.com/museum/computer.asp?c=1173
    date: '2023-06-09'
---

As the [PC-1401](/museum/sharp-pc-1401-pc-1402-pc-1421/) family was rather successful, Sharp released an update three years later.

The two new models were named **PC-1403** and **PC-1403H**.\
The differences were not large, but very helpful. They had a better display, with 24 instead of 16 characters on the same display area, and lowercase letters could now be used. Thus, there was an additional SML key to switch between uppercase and lowercase entry mode.\
Moreover, matrix calculation functions had been added, such as addition, multiplication, inversion and determinant. They could be used in calculator mode only.

The hardware was based on a later incarnation of the SC61860 CPU, paced at 768 kHz. The RAM had also been expanded, with 8 KB in the PC-1403 (D4364G 8k x 8 static RAM), and generous 32 KB in the PC-1403H (D43256AG 32k x 8 static RAM). The new functions also required a larger ROM (72 KB, LZ92K32 plus SC6976T).

Thanks again to [Roman von Wartburg](http://retrocomputing.ch/) for this information.