yann64andClaude Opus 5.5
3eeabe9649
6,654 pages: 1,289 machines, 702 software, 460 companies, 64 history, 17 articles, 59 fun. 4,336 media files so far; references to files not downloaded yet are left out. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ
138 lines
4.9 KiB
Markdown
138 lines
4.9 KiB
Markdown
---
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title: Hewlett Packard HP-87
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categories:
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- Computers
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types:
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- Professional Computer
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origins:
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- U.S.A.
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years:
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- '1982'
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cpus:
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- '''Capricorn'' custom HP 8-bit CPU'
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params:
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name: HP-87
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company: /companies/hewlett-packard
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company_name: Hewlett Packard
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specs:
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- label: NAME
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value: HP-87
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- label: MANUFACTURER
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value: Hewlett Packard
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- label: TYPE
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value: Professional Computer
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- label: ORIGIN
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value: U.S.A.
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- label: YEAR
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value: September 1982
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- label: END OF PRODUCTION
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value: '1984'
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- label: BUILT IN LANGUAGE
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value: HP Basic interpreter
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- label: KEYBOARD
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value: Full stroke 93 keys with numeric keypad and user definable keys
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- label: CPU
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value: '''Capricorn'' custom HP 8-bit CPU'
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- label: SPEED
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value: 0.625 MHz
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- label: CO-PROCESSOR
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value: Custom HP I/O circuits
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- label: RAM
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value: 32 KB up to 534 KB max.
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- label: VRAM
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value: 16 KB
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- label: ROM
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value: 48 KB
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- label: TEXT MODES
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value: 80 chars x 16 or 24 lines (software switch)
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- label: GRAPHIC MODES
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value: 544 x 240 dots
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- label: COLORS
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value: Monochrome
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- label: SOUND
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value: Tone Generator
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- label: SIZE / WEIGHT
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value: Unknown
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- label: I/O PORTS
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value: Four I/O Ports, HP-IB
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- label: BUILT IN MEDIA
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value: None
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- label: OS
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value: Built-in BASIC language. Optional CP/M O.S. Needed external FD/HD unit
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- label: POWER SUPPLY
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value: Built-in power supply unit - 110V / 240V switchable
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- label: PERIPHERALS
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value: |-
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Speech Synthesis module, modem\
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Various extension cards: GP-IB, Serial, FDD/HDD controller, I/O routines, Parallel, BASIC extensions
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- label: PRICE
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value: $2495, (HP-87), $2995 (HP-87XM)
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tabs:
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- photos
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- emulators
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- links
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photos:
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- title: KEYBOARD CLOSE-UP
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subtitle: ''
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text: ''
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image: null
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- title: HP-IB INTERFACE
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subtitle: ''
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text: This interface allowed to connect in chain up to 14 peripherals - mass storage, printers, plotters - using HP-IB or IEEE-488 protocol.
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image: null
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- title: EXPANSION CONNECTORS
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subtitle: ''
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text: Mainly used for RAM/ROM expansions.
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image: null
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- title: RUNNING CP/M
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subtitle: ''
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text: ''
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image: null
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emulators:
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- title: Emulator for the HP85B & HP86B/87
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url: http://olivier.2.smet.googlepages.com/HPSERIES80
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platform: Windows
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text: Open source GNU licence
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- title: HP 86 / 87(+) emulator
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url: http://www2.akso.de/files/series_80/Emulator/
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platform: Windows
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text: ''
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links:
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- title: HP Series 80 Web Site
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url: http://www.series80.org/
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text: Nice website dedicated to HP Series 80 computers (manuals, programs, ROMs, articles, accessories, etc.).
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- title: The Museum of HP Calculators
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url: http://www.hpmuseum.org/hp85.htm
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text: Some useful infos here
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- title: Web Wiz CAPTCHA
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url: http://www.webwizcaptcha.com
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text: Lots of further info and links on the Series 80
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comments:
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- author: Ryan Schweitzer (United States)
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date: Saturday 13rd July 2019
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text: The local public safety/911 dispatch center back in the ''80s in my town (Bismarck, ND) had an HP-87 at their dispatch console that was used to control the outdoor warning sirens (for tornado alerts and such) across town. It was loaded with a custom software package for such, IIRC.
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related:
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- /museum/hewlett-packard-hp-85
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- /museum/hewlett-packard-hp-86
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oc_id: 926
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source:
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url: https://web.archive.org/web/20230417024943/http://www.old-computers.com/museum/computer.asp?c=926
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date: '2023-04-17'
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---
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The HP-87 was the follow-on model to the [HP-85](/museum/hewlett-packard-hp-85/) in the 'Series 80'. It was a logical development, keeping the same processor and clock speed, but with the following changes:
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• Basic language extended ie long variable names added, support for larger graphical display, total 48K in ROM.\
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• Allows programs to address memory above 64K, through use of an extended memory controller.\
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• HP-87 has 32K RAM built in, and allows up to 4 extra RAM modules of either 32K, 64K or 128K ie 534K max.\
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• Built in HP-IB interface, together with software support for basic I/O, mass-storage and printing without additional ROMs.\
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• Bigger screen allowing 80 column text, with either 16 or 25 lines.\
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• No built in tape or printer.\
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• Support for multiple (up to 5) binary programs in RAM.
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The HP-87 was followed by the [HP-86](/museum/hewlett-packard-hp-86/) and HP-87XM. The HP-86 lost the internal monitor in favour of an external monitor, and lost the built in HP-IB connector in favour of a Centronics parallel printer port and two connectors for HP floppy disks.
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The HP-86 also had 64K RAM while the HP-87XM included 128K RAM. The final machine in the series 80 family was the **HP-86B**, which went back to having a built-in HP-IB port and featured 128K of RAM.
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Thanks to **John Shadbolt** and his [site](http://www.vintagecomputers.freeserve.co.uk/index.htm) for this information
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