--- title: Casio FX-702P categories: - Computers types: - Pocket origins: - Japan years: - '1981' cpus: - 4 bit CMOS LSI params: name: FX-702P image: /media/museum/photos/casio_fx702p_system_s1.jpg company: /companies/casio company_name: Casio specs: - label: NAME value: FX-702P - label: MANUFACTURER value: Casio - label: TYPE value: Pocket - label: ORIGIN value: Japan - label: YEAR value: '1981' - label: END OF PRODUCTION value: Unknown - label: BUILT IN LANGUAGE value: Basic interpreter - label: KEYBOARD value: 65 keys, calculator type with alphanumeric keys (non-QWERTY) - label: CPU value: 4 bit CMOS LSI, 4 x NEC D444G - label: SPEED value: Unknown - label: RAM value: 1680 bytes for BASIC plus 26 memories - label: ROM value: Unknown - label: TEXT MODES value: 1 line x 20 chars plus a 4 digit seven segment display part - label: GRAPHIC MODES value: None - label: COLORS value: Monochrome - label: SOUND value: None - label: SIZE / WEIGHT value: 165 (W) x 82 (D) x 17 (H) mm / 176 g (with batteries) - label: I/O PORTS value: 7-pin expansion port for printer and cassette interface, 11-pin slot for memory module - label: POWER SUPPLY value: 2 x CR-2032 lithium batteries - label: PERIPHERALS value: |- FA-2 cassette interface\ FP-10 mini electro printer: electrostatic printer for 35 mm metallised paper - label: PRICE value: '250' tabs: - photos - adverts - hardware - links forum_thread: 961 photos: - title: FRONT VIEW subtitle: '' text: Roman Von Wartburg image: /media/museum/photos/casio_fx702p_keyboard_s1.jpg - title: KEYBOARD CLOSE-UP subtitle: '' text: '' image: /media/museum/photos/casio_fx702p_keybcloseup_s1.jpg - title: BOTTOM SIDE subtitle: '' text: |- **(1)** Batteries housing\ **(2)** RAM module connector\ **(3)** Expansion port image: /media/museum/photos/casio_fx702p_bottomside_s1.jpg - title: INSIDE subtitle: '' text: |- **(1)** Display driver chips\ **(2)** Four NEC CMOS LSI chips in charge of CPU functions, ROM and RAM memory and I/O ports\ **(3)** Expansion connector\ **(4)** LCD contrast knob image: /media/museum/photos/casio_fx702p_inside_s1.jpg - title: MANUALS subtitle: '' text: The FX-702P vas delivered with a user manual and a very useful program library gathering more than 70 programs and complex calculations image: /media/museum/photos/casio_fx702p_manuals_s1.jpg - title: THE BOX subtitle: '' text: Both sides of the FX-702 box. image: /media/museum/photos/casio_fx702p_box_s1.jpg adverts: - title: FRENCH ADVERT (MAY 1982) subtitle: '' text: |- "Computing pret-a-porter" "Casio FX-702P : pocket Basic" "Casio, it counts" image: /media/museum/pubs/casio_fx702p_pub_3.jpg - title: FRENCH ADVERT (DEC. 1983) subtitle: '' text: '"Basic, It is magic"' image: /media/museum/pubs/casio_fx702p_pub_1.jpg - title: FRENCH ADVERT (DEC. 1982) subtitle: '' text: |- "Christmas accounts" "Casio, it counts" image: /media/museum/pubs/casio_fx702p_pub_2.jpg hardware: - title: FA-2 INTERFACE subtitle: '' text: FA-2 tape recorder interface image: /media/museum/hardware/casio_fx702p_fa2interface_s1.jpg - title: FP-10 PRINTER subtitle: '' text: The FP-10 Mini Electro Printer can be connected to the FX-601P/602P and FX-702P computers. It uses metalized paper rolls and prints 20 characters per line. image: /media/museum/hardware/casio_fx702p_fp10printer_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 ! related: - /museum/casio-fx-700p - /museum/casio-pb-100 - /museum/casio-pb-300 oc_id: 987 source: url: https://web.archive.org/web/20230605041544/http://www.old-computers.com/museum/computer.asp?c=987 date: '2023-06-05' --- The FX-702P was Casio's answer to Sharp's [PC-121x](/museum/sharp-pc-1210-1211-1212/) series. In certain ways, this machine marks the transition from keystroke programmables such as the FX-601P/602P to "real" pocket computers. On the one hand, Casio labeled the FX-702P only as "Programmable Calculator", and its non-QWERTY layout of the alphanumerical keys differentiate it from most later pocket computers. On the other hand, the FX-702P had a viable BASIC interpreter which allows for more flexible programming. The hardware mainly consists of four CMOS LSI chips incorporating logical functions and memory, and four display driver chips. The display provides 20 characters in 5x7 pixel matrix, plus a separate 7-segment display part indicating the remaining program memory. Comparable to the Sharp PC-1211 and 1212, the FX-702P had about 2 KB of RAM, divided into 1680 BASIC steps and 26 memories; more memory for variables could be partitioned out at the expense of BASIC memory. A memory expansion slot was built-in, but a suitable RAM module never came out. With this model, Casio introduced their method of dividing program memory into 10 autonomous areas - P0 to P9 - which continued to be implemented in all following Casio models for many years.\ The nonstandard keyboard makes it most cumbersome to use for anybody familiar with the QWERTY standard; on the other hand, triple assignments of most keys makes programming somewhat more efficient. The built-in interpreter supports a variant of the BASIC language, with some keywords spelled in a different way than the later quasi-standard, e.g. PRT instead of PRINT, or GSB and RET for GOSUB and RETURN. Compared to Sharp's PC-121x models, it has substantially more mathematical and statistical functions, string manipulation functions and a more flexible variable handling scheme. Two peripheral devices were available:\ • The **FA-2** Cassette Interface, which, as a side note, could also play musical notes when used with the FX-501P/FX-502P or FX-601P/602P calculators, but not with the FX-702P,\ • The **FP-10** Mini Electro Printer, a non-impact, electrostatic printer, which used special metalized paper. Thanks to **Roman von Wartburg** and his [site](http://retrocomputing.ch/) for this information.