Computermuseum der Stuttgarter Informatik (Universität Stuttgart). A little page with informations about the HP9830 that is on display at the museum. Highlight: the link on the bottom of the page. It will redirect you to a FTP-Server full of manuals, schematics etc.!
The HP Computer Museum in Melbourne. The page has some good advice for collectors and restorers, as well as very good links to other resources. “Must click”: the link to “Product documentation” on the page bottom… it will lead you to an incredible collection of documents. Must have: 9830ACalculator-ServiceManual-09830-90030-140pages-Jan76.pdf !
Brent Hilperts page on the HP9830. You won’t find any more detailed information on the machine than here! A huge collection of schematics, microcode, timings etc. Warning! This is heavy stuff! Maybe not suitable for noobs (like me), but indispensable for everyone who wants to dive deep into the topic.
HP9830.com by Dan Veeneman. A little potpourri of information. Anyone who wants to power up a HP9830 for the first time should read the section “Initial Checkout”and follow the instructions step by step! If you should own a HP plotter you may find the BASIC program listings interesting.
The Dalby Datormuseum by Rune Andersson and Mattis Lind. They describe some of the malfunctions of their machine and how they fixed them. The Repair Guide and the Schematics by Tony Duell, which can be downloaded here, are pure gold! Worth a look is also the youtube video with a little tour on the HP9830.
John Nery is manufacturing different extender boards for vintage computers. If you want to make measurements on a running HP9830 you will find them extremely helpful. A much better solution than soldering wires to the IC’s in order to attach a measuring device. The extender boards are available at his ebay-shop.
Two Youtube channels that inspired me to begin with retro computing: “Lazy Game Reviews (LGR)” gives you a lot of flashbacks into the 80s and 90s, and the guy (Clint) is -really- funny! A little bit more serious, but non the less crazy and entertaining is “Curious Marc“. He and his team are handling the really heavy irons, for example Xerox Alto, IBM Mainframes or the holy grail: an original Apollo Guidance Computer (yes, the thing that navigated men to the moon!)