HP 71B: Difference between revisions

HP 71B (edit)

Revision as of 03:58, 16 August 2022

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 [[Category:Saturn]]
-{{Infobox calculator|name=HP 71B|predecessor=[[HP 75C/D]]|entry=Algebraic|successor=[[HP 94]], HP 95LX|display_type=Dot-matrix LCD|ports=4x ROM/RAM slots, 1x card reader/ROM/RAM header, 1x HP-IL/ barcode reader module slots|image=Image: HP 71B.jpg|processor=HP Saturn 1LF2|frequency=640kHz|other_names=HP 44A (during development)|supply=4x AAA battery or 8VAC power supply|introduced=1983|cost=550 USD|type=Pocket computer, scientific calculator}}The '''HP 71B''' is a pocket computer and scientific calculator produced by Hewlett Packard.
+{{Infobox calculator|name=HP 71B|predecessor=[[HP 75C/D]]|entry=Algebraic|successor=[[HP 94]], HP 95LX|display_type=Dot-matrix LCD|ports=4x ROM/RAM slots, 1x card reader/ROM/RAM header, 1x HP-IL/ barcode reader module slots|image=Image: HP 71B.jpg|processor=HP Saturn 1LF2|frequency=640kHz|other_names=HP 44A (during development)|supply=4x AAA battery or 8VAC power supply|introduced=1983|cost=550 USD|type=Pocket computer, scientific calculator|discontinued=1989}}The '''HP 71B''' is a pocket computer and scientific calculator produced by Hewlett Packard.
 == Features ==
 == Internal design ==
-Internally, the HP 71B is divided up into two separate boards with a ribbon cable connecting them. The upper board contains the Saturn microprocessor, keyboard, and display. The lower board contains the power supply hardware, ROM, RAM, and expansion slots.<gallery>
+Internally, the HP 71B is divided up into two separate boards, earlier models use a ribbon cable to connect the boards, while later models use a zebra strip. The upper board contains the Saturn microprocessor, keyboard, and display. The lower board contains the power supply hardware, ROM, RAM, and expansion slots.<gallery>
-File:HP 71B upper board.jpg|Upper board
+File:HP 71B upper board.jpg|Upper board (1983)
-File:HP 71B lower board.jpg|Lower board
+File:HP 71B lower board.jpg|Lower board (1983)
+File:HP 71B upper board 1987.jpg|Upper board (1987)
+File:HP 71B lower board 1987.jpg|Lower board (1987)
 </gallery>