HP 250
 | This article needs additional citations for verification. (August 2016) |
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 (GSD), but was a major repackaging of desktop workstation HP 9835 which had been sold in small business configurations. The HP9835's processor was initially used in the first HP250s.
The HP250 borrowed the embedded keyboard design from the HP300 and added a wider slide-able and tilt-able monitor with screen labeled function keys buttons physically placed just below on-screen labels (a configuration now used in ATMs and gas pumps) built into a large desk design.
Though the HP250 had a different processor and operating system, it used similar interface cards to the HP300, and then later also the HP3000 models 30, 33, 40, 42, 44, and 48: HP-IB channel (GIC), Network, and serial (MUX) cards. Usually the HP250 was a small HP-IB single channel system (limited to seven HP-IB devices per GIC at a less than 1 MHz bandwidth).
Initially the HP250 was like the HP300 as a single user, floppy based computer system. Later a multi-user ability was added, and the HP300's embedded hard drive was installed as a boot drive. Additionally, drivers were made available to connect and use more HP-IB devices: hard disc and tape drives, plus impact and matrix printers. This gave some business-growth scale-ability to the HP250 product line.
The HP250 was advertised in 1978 and was promoted more in Europe as an easy-to-use, small space, low cost business system, and thus sold better in Europe. The next-gen HP250 was the HP260 which lost the table, embedded keyboard, and CRT for a small stand-alone box.
HP systems moved away from all-in-one table top designs to having the system in a remote secure location, and remotely connecting user's terminals and peripherals out to in their work area. In those days, RS-232 cables ran from desk side terminals (262x low cost terminals) to the HP250 via a MUX card. Speeds of 9600 baud were common (pre- LAN / network cards to PCs).
See also
References
- ^ Davis, Steve (1979-09-01). "European 2631A Users Beware!" (PDF). Computer Systems Newsletter - for HP Field Personnel. 4 (20). Hewlett-Packard: 4. Archived (PDF) from the original on 2016-08-17. Retrieved 2016-08-17.
009 - Roman Extension Set […] option 009 gives all the commonly used European characters a unique code. When this "Roman Extension" set is used in conjunction with the standard ASCII character set, the end result is a 256 character set represented by 8-bit code. The use of shift-in and shift-out characters is not required, since decimal codes 0 through 127 automatically access USASCII while codes 128 through 255 access the European characters. It IS Important to understand the differences between the two techniques and to know whlch technlque IS supported on a glven system. The HP 250 and HP 300 support the 8-bit code technlque, consequently, 2631A option 009 must be ordered to provlde local language prlntlng on these two systems. All other HP computer systems and the 264X terminals support the 7-bit code, shift-in/shift-out method.
External links
- Ed Thelen's Computer History Museum Visible Storage page
- "misc" (PDF). Hewlett-Packard Journal. 30 (4). Hewlett-Packard. April 1979. Archived (PDF) from the original on 2016-08-17. Retrieved 2016-08-17.
- Stan Sieler's HP250 page
- HP Museum site
- Retro Computer museum, Zatec, Czech Republic video
 | This microcomputer- or microprocessor-related article is a stub. You can help Wikipedia by expanding it. |