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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ

content/museum/casio-fx-700p.md

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+---
+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.