EBTKS: This project started off as an attempt to repair the tape drive of an HP-85A desktop computer. Most of these tape drives (maybe all) have failed because the rubber capstan that moves the magnetic tape in the DC100/HP98200A cartridges have either disintegrated or turned into goo. My companion web site documents my Repair Adventures . Eventually I decided that the repair of the tape drives and the tapes was a lost cause, so I decided that I would design a Solid State Tape Drive replacement that would be compatible with the existing HP85 operating system, and be responsive to all the same commands. I discussed this with my long time friend Russell Bull, and together we have co-designed the hardware and the firmware to make it all work. During our development work, we turned to Everett Kaser for guidance and he soon joined our team and is responsible for the AUXROMs, which added extensive functionality in the form of over 70 new keywords.

http://ftp.parisc-linux.org/: Welcome to the PA RISC/Linux project archive!

Handheld and Portable Computer Club: HPCC is a voluntary, independent body run by and for users of handheld and portable computers and calculators. The club has been helping members for more than 30 years to get the most from their Hewlett Packard equipment and to further the exchange of information and ideas.

Hewlett Packard Series 100 FAQ

HP 9825: Now vanished into the mists of time and computer evolution, the Hewlett-Packard 9825 desktop computer was way before its time. In many ways, the development of the HP 9825 and its brethren marked a significant turning point for the computer industry. It foreshadowed the PC revolution fully five years (that’s 50 years in computer time) before the IBM PC burst into existence in 1981.

HP Collection: HP-Collection shows vintage Hewlett Packard calculators and their accessories. There is no forum on my site, because there is a frequently used one on the MoHPC. site. So my page is not a competitive product, but it´s an addendum to Dave´s site. I will especially focus on the accessories of the calculators.

HP Series 80 Web Site: I wish to gather all the material that is still available for the Series 80 and post them on this site, so that people who wish to use these venerable machines can use this site as a resource. In this site you will find, articles about the Series 80, programs, manuals, ROM images, etc.

HP Stuff: Some Material Related to Historic Hewlett Packard Calculators and Computers.

HP-85 Restorations: These pages document in as much detail as possible my experiences and results of repairing and restoring a HP-85A and HP-85B desktop computers.

HP85Disk: This Project Emulates AMIGO and SS80 disk drives used by the HP85 series computers. The images are stored in LIF format used by the HP85 series computers.