HP 300
Encyclopedia
HP 3000
The HP 3000 series is a family of minicomputers released by Hewlett-Packard in 1973. It was designed to be the first minicomputer delivered with a full featured operating system with time-sharing. The first models were withdrawn from the market until speed improvements could be made. It ultimately...
, but with virtual memory for both code and data. The HP300 was cut-short from being a commercial success despite the huge engineering effort, which included HP-developed and -manufactured silicon on sapphire
Silicon on sapphire
Silicon on sapphire is a hetero-epitaxial process for integrated circuit manufacturing that consists of a thin layer of silicon grown on a sapphire wafer. SOS is part of the Silicon on Insulator family of CMOS technologies...
(SOS) processor and I/O chips.
The HP300 was initially designed as a single-user workstation by a totally separate program within the General Systems Division (GSD), the Cupertino, CA home of the HP 3000 business computers (the division was later renamed Computer Systems Division CSY). Later, the HP300 design team developed multi-user abilities, and an ahead or its time inter-unit processor interconnect that let one HP300 change registers in other inter-connected HP300's system.
The circuit boards were in a floor pedestal box, with CRT on top with built in soft keys, and fixed keyboard protruding in front. It pioneered such ideas as built-in networking, automatic spelling correction, multiple windows (on a character based screen), and labels adjacent to vertically stacked user function keys, now used on ATMs and gas pumps.
The HP300 featured HP-IB (later IEEE-488
IEEE-488
IEEE-488 is a short-range digital communications bus specification. It was created for use with automated test equipment in the late 1960s, and is still in use for that purpose. IEEE-488 was created as HP-IB , and is commonly called GPIB...
) interface (IF) as the I/O bus, an 8" floppy disk
Floppy disk
A floppy disk is a disk storage medium composed of a disk of thin and flexible magnetic storage medium, sealed in a rectangular plastic carrier lined with fabric that removes dust particles...
, and a built in fixed 12M hard drive. Later drivers for HP7970E tape drive allowed for easier HP300 system back ups. It also had a native system programming language, a database, BASIC
BASIC
BASIC is a family of general-purpose, high-level programming languages whose design philosophy emphasizes ease of use - the name is an acronym from Beginner's All-purpose Symbolic Instruction Code....
, and featured screen editing for RPG.
HP Computer Systems Division General Manager (GM), Doug Spreng, decided the file system differences between the division's money making HP3000 line and the burgeoning HP300 would keep the HP300 from being successful and killed the product. This along with many other disruptive management decisions cause many good but dis-heartened Engineers to leave HP for other companies.
HP built two semi-truck loads of units before shutting down the HP300 production line to meet customer contractual agreements (i.e.: encase LLNL wanted more Amigos).
HP commonly reused the work of killed products in other product designs to save money and keep design-team morale up. The processor board and I/O boards were used in later HP 3000
HP 3000
The HP 3000 series is a family of minicomputers released by Hewlett-Packard in 1973. It was designed to be the first minicomputer delivered with a full featured operating system with time-sharing. The first models were withdrawn from the market until speed improvements could be made. It ultimately...
systems that used the HP300's advanced designs: HP3000 model 30 (project name: Koala - a single card bay stand-alone box) and model 33 (project name: Toothpick - a double card bay table design) reused many of HP300's designs. The HP300 diagnostics (DUS) were ported over and used in these and future HP3000 models.
Later, the HP300 design team over came the first generation HP300 slower TTL circuitry with a SOS design (project name: Sizzler). Again the GM killed its release and reused its designs in a new HP3000 model 40 (project name: Cub - single card bay stand-alone box) and the model 44 (project name: Grizzly - double card bay table design).
The HP3000 models 30, 33, 40, 44, 42, & 48 went on to great success using what was developed in the HP300. The HP300's change to one (at the time) high speed interface HP-IB channel from HP3000's previous use of many different type internal IF cards radically changed and improved future HP system designs.
Developed about the same time in Loveland CO, then later in the same GSD Cupertino site, the HP 250
HP 250
The HP 250 was a multiuser business computer by Hewlett Packard running HP250 BASIC language as its OS with access to HP's IMAGE database management. It was produced by the General Systems Division , but was a major repackaging of desktop workstation HP 9835 which had been sold in small business...
small business system running an easy to use HP250 Business Basic language to access HP's Image Database, was based on the HP9845 workstation using a HP Loveland calculator processor. The built-in CRT head with softkeys and the embedded keyboard design removed from the HP300 was reused in the HP250 table-top designs.
- HP Journal, July 1979 HP300 hardware and software details are described].
- HP Computer Museum HP300 page