---
title: Casio FX-700P
categories:
- Computers
types:
- Pocket
origins:
- Japan
years:
- '1982'
cpus:
- HD61913 CMOS VLSI
params:
  name: FX-700P
  image: /media/museum/photos/casio_fx700p_system_s1.jpg
  company: /companies/casio
  company_name: Casio
  specs:
  - label: NAME
    value: FX-700P
  - label: MANUFACTURER
    value: Casio
  - label: TYPE
    value: Pocket
  - label: ORIGIN
    value: Japan
  - label: YEAR
    value: '1982'
  - label: END OF PRODUCTION
    value: Unknown
  - label: BUILT IN LANGUAGE
    value: Basic interpreter
  - label: KEYBOARD
    value: QWERTY calculator type 54 keys with numeric keypad
  - label: CPU
    value: HD61913 CMOS VLSI
  - label: SPEED
    value: 455 kHz ceramic resonator used as system clock
  - label: RAM
    value: 2 KB (1568 bytes for BASIC)
  - label: ROM
    value: 12 KB
  - label: TEXT MODES
    value: 1 line x 12 chars plus a 4 digit seven segment display part
  - label: GRAPHIC MODES
    value: None
  - label: COLORS
    value: Monochrome LCD
  - label: SOUND
    value: None
  - label: SIZE / WEIGHT
    value: 165 (W) x 71 (D) x 10 (H) mm / 116 g (with batteries)
  - label: I/O PORTS
    value: 12-pin expansion port for printer and cassette interface
  - label: POWER SUPPLY
    value: 2 x CR-2032 lithium batteries
  - label: PERIPHERALS
    value: |-
      FA-3 cassette interface\
      FP-12 mini thermal printer
  - label: PRICE
    value: $200 (USA, Dec 1983) including FA-3 and FP-12
  tabs:
  - photos
  - links
  photos:
  - title: FRONT VIEW
    subtitle: ''
    text: ''
    image: /media/museum/photos/casio_fx700p_frontview_s1.jpg
  - title: USER MANUALS
    subtitle: ''
    text: German versions of the user manual and software library.
    image: /media/museum/photos/casio_fx700p_manuals_s1.jpg
  links:
  - title: Silrun Systems
    url: http://www.silrun.info/
    text: Documentations to download for Casio pockets ! Useful.
  - title: The Pocket Computer Museum
    url: http://pocket.free.fr/
    text: The site to visit for pockets computers !
  comments:
  - author: Bruno Chatard (Switzerland)
    date: Tuesday 12th April 2022
    text: The blue F key of the FX-700 presses a switch on the keyboard which was also present on the PB-100. It had become common among students to drill the PB-100 of the time to add this handcrafted F key and thus inherit the accelerated entry of the mathematical functions (SIN, COS, etc.).
  - author: Carl Holmberg (USA)
    date: Friday 21st January 2022
    text: 'As Ivan says, the interior of the MK-85 has nothing in common with the Casio, using the KA1013VM1 processor, one of a family that grew out of the original DEC LSI-11 cpu clone. The PDP roots ran deep: it can be programmed in the DEC assembly language MACRO-11. Using an N-Queens benchmark, BASIC 10m45s, fast mode BASIC 2m, assembly 1.22s, fast mode assembly 0.22s.'
  - author: Ivan Mikhailov
    date: Thursday 13rd August 2015
    text: |-
      Two corrections:\
      1\. In Russian, MK stands for "microcomputer".\
      2\. MK-85 has the body cloned from Casio but it''s absolutely different inside. MK-85 is 16-bit and it''s compatible (to a degree) with DEC PDP boxes. E.g. one of its variations was used for strong cryptography (to wire money transfers via unsafe public networks).

      Original design of MK-85 (with misleading name MK-87) has nothing common with Casio: http://www.computerra.ru/upload/apismenny/elektronika-mk-87-1.jpg
  - author: Joe Jack Johnson (So-Cal.)
    date: Saturday 14th February 2015
    text: |-
      This was cloned down to the buttons by the Soviets as the Elektronika MK-85....probably had different guts (the Soviets had round microchips for calculators for some reason.)

      "MK" stands for "mark." Elektronika was a stock name for electronic gadgets made in the USSR that weren''t radios.
  related:
  - /museum/casio-fx-702p
  - /museum/casio-pb-100
  - /museum/casio-pb-300
  oc_id: 1002
  source:
    url: https://web.archive.org/web/20230605032402/http://www.old-computers.com/museum/computer.asp?c=1002
    date: '2023-06-05'
---

The FX-700P is quite the same machine as the [PB-100](/museum/casio-pb-100/), but is a member of the more scientifically oriented FX product family. Consequentially, it is called "Programmable Calculator", as most FX family members.

It has 2 KB RAM, i.e. it was equipped with two HD61914 RAM chip instead of one like the PB-100, but no further RAM expansion was ever made available.\
Moreover, the mathematical functions (SIN, COS, etc.) were assigned to the keyboard, by means of an additional function key. Apart from that, the hardware of the two machines is identical.