website/content/museum/hewlett-packard-hp-75c-75d.md

title, categories, types, origins, years, cpus, params

title	categories	types	origins	years	cpus	params
Hewlett Packard HP-75C / 75D	Computers	Pocket	U.S.A.	1982	8 bits	name image company company_name specs tabs adverts links comments oc_id source HP-75C / 75D /media/museum/photos/hp_75c_system_1.jpg /companies/hewlett-packard Hewlett Packard label value NAME HP-75C / 75D label value MANUFACTURER Hewlett Packard label value TYPE Pocket label value ORIGIN U.S.A. label value YEAR 75C : September 1982\ 75D: 1984 label value END OF PRODUCTION 75C : May 1984\ 75D : 1986 label value BUILT IN LANGUAGE Basic interpreter, Visicalc spreadsheet label value KEYBOARD 64 keys. Each key is user-definable label value CPU 8 bits, called Capricorn label value RAM 16 KB label value ROM 48 KB label value TEXT MODES LCD display. 1 line x 32 chars. label value GRAPHIC MODES 160 x 9 pixels label value COLORS Monochrome label value SOUND Beeper label value SIZE / WEIGHT 25.4 x 12.7 x 3.2 cm. - Weight 737g. label value I/O PORTS HP-IL, 3 x ROM/RAM expansion ports label value BUILT IN MEDIA Memory cards, 1.3 KB label value OS Specific label value POWER SUPPLY Battery pack or external AC adaptor label value PRICE 75C: $995 - 75D: $1095 adverts links title subtitle text image FIRST AD February 1983 - The real-size system picture occupied almost the full right page. /media/museum/pubs/hp_75c_pub_1.jpg title url text Reverse-Engineering the HP-75C http://www.fortitudine.com/~coryc/html/hp75c.shtml Very informative page with useful & practical info such as keys functions, Basic commands and HP-IL operations title url text The Museum of HP calculators http://www.hpmuseum.org/hp75.htm This site has a nice and complete page about the HP-75C/D. You can even order the original manual. author date text Otto (Brazil) Monday 14th February 2011 I has one (serial $ 78). There was 2 lines on screen. author date text Rodolfo Gil (Venezuela) Friday 11th March 2005 Hi!. I´m found a HP75C in a trash can!. I´m want to bring it to life again. Do someboy have got an electronic version of its manual?. I will apreciate very much!. rodolfo.gil@uny.edu.ve / rufogil@hotmail.com 640 url date https://web.archive.org/web/20230607231723/http://www.old-computers.com/museum/computer.asp?c=640 2023-06-07

The HP-75C was the first pocket computer ever produced by HP who wanted a pocket book format (10”x 5”) computer as powerful as a desktop. It can also be considered as the first organizer able to deal with a multiple alarms time schedule, to control real time peripherals and to memorize text files.

Its 48KB ROM contained a very complete Basic language and a light version of the spreadsheet Visicalc. Three slots allowed adding pre-programmed ROM modules (Maths, finance, word processor…)

It integrated a card reader. The cards was manually slipped front of the magnetic head. Each card could stock 1.3 KB of information on 2 tracks (650 bytes each). The card information coding allowed great variations of the reading speed, due to manual handling.

The HP-IL (Interface Loop) interface allowed connecting as far as 30 peripherals simultaneously on the HP-75C. Amid the peripherals, one could find a display unit, printers, a modem, a tape recorder and all the HP-IL standard peripherals.
As always with HP, the manuals were very complete and pedagogical.

The HP-75D was released two years later. It added a wand and wand port. When used with the Bar Code ROM, the computer could scan CODE11, CODE39, UPC, and EAN codes. This made the computer useful for inventory control.