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6,654 pages: 1,289 machines, 702 software, 460 companies, 64 history, 17 articles, 59 fun.
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ

content/museum/hewlett-packard-hp-87.md

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+---
+title: Hewlett Packard HP-87
+categories:
+- Computers
+types:
+- Professional Computer
+origins:
+- U.S.A.
+years:
+- '1982'
+cpus:
+- '''Capricorn'' custom HP 8-bit CPU'
+params:
+  name: HP-87
+  company: /companies/hewlett-packard
+  company_name: Hewlett Packard
+  specs:
+  - label: NAME
+    value: HP-87
+  - label: MANUFACTURER
+    value: Hewlett Packard
+  - label: TYPE
+    value: Professional Computer
+  - label: ORIGIN
+    value: U.S.A.
+  - label: YEAR
+    value: September 1982
+  - label: END OF PRODUCTION
+    value: '1984'
+  - label: BUILT IN LANGUAGE
+    value: HP Basic interpreter
+  - label: KEYBOARD
+    value: Full stroke 93 keys with numeric keypad and user definable keys
+  - label: CPU
+    value: '''Capricorn'' custom HP 8-bit CPU'
+  - label: SPEED
+    value: 0.625 MHz
+  - label: CO-PROCESSOR
+    value: Custom HP I/O circuits
+  - label: RAM
+    value: 32 KB up to 534 KB max.
+  - label: VRAM
+    value: 16 KB
+  - label: ROM
+    value: 48 KB
+  - label: TEXT MODES
+    value: 80 chars x 16 or 24 lines (software switch)
+  - label: GRAPHIC MODES
+    value: 544 x 240 dots
+  - label: COLORS
+    value: Monochrome
+  - label: SOUND
+    value: Tone Generator
+  - label: SIZE / WEIGHT
+    value: Unknown
+  - label: I/O PORTS
+    value: Four I/O Ports, HP-IB
+  - label: BUILT IN MEDIA
+    value: None
+  - label: OS
+    value: Built-in BASIC language. Optional CP/M O.S. Needed external FD/HD unit
+  - label: POWER SUPPLY
+    value: Built-in power supply unit - 110V / 240V switchable
+  - label: PERIPHERALS
+    value: |-
+      Speech Synthesis module, modem\
+      Various extension cards: GP-IB, Serial, FDD/HDD controller, I/O routines, Parallel, BASIC extensions
+  - label: PRICE
+    value: $2495, (HP-87), $2995 (HP-87XM)
+  tabs:
+  - photos
+  - emulators
+  - links
+  photos:
+  - title: KEYBOARD CLOSE-UP
+    subtitle: ''
+    text: ''
+    image: null
+  - title: HP-IB INTERFACE
+    subtitle: ''
+    text: This interface allowed to connect in chain up to 14 peripherals - mass storage, printers, plotters - using HP-IB or IEEE-488 protocol.
+    image: null
+  - title: EXPANSION CONNECTORS
+    subtitle: ''
+    text: Mainly used for RAM/ROM expansions.
+    image: null
+  - title: RUNNING CP/M
+    subtitle: ''
+    text: ''
+    image: null
+  emulators:
+  - title: Emulator for the HP85B & HP86B/87
+    url: http://olivier.2.smet.googlepages.com/HPSERIES80
+    platform: Windows
+    text: Open source GNU licence
+  - title: HP 86 / 87(+) emulator
+    url: http://www2.akso.de/files/series_80/Emulator/
+    platform: Windows
+    text: ''
+  links:
+  - title: HP Series 80 Web Site
+    url: http://www.series80.org/
+    text: Nice website dedicated to HP Series 80 computers (manuals, programs, ROMs, articles, accessories, etc.).
+  - title: The Museum of HP Calculators
+    url: http://www.hpmuseum.org/hp85.htm
+    text: Some useful infos here
+  - title: Web Wiz CAPTCHA
+    url: http://www.webwizcaptcha.com
+    text: Lots of further info and links on the Series 80
+  comments:
+  - author: Ryan Schweitzer (United States)
+    date: Saturday 13rd July 2019
+    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.
+  related:
+  - /museum/hewlett-packard-hp-85
+  - /museum/hewlett-packard-hp-86
+  oc_id: 926
+  source:
+    url: https://web.archive.org/web/20230417024943/http://www.old-computers.com/museum/computer.asp?c=926
+    date: '2023-04-17'
+---
+
+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:
+
+• Basic language extended ie long variable names added, support for larger graphical display, total 48K in ROM.\
+• Allows programs to address memory above 64K, through use of an extended memory controller.\
+• HP-87 has 32K RAM built in, and allows up to 4 extra RAM modules of either 32K, 64K or 128K ie 534K max.\
+• Built in HP-IB interface, together with software support for basic I/O, mass-storage and printing without additional ROMs.\
+• Bigger screen allowing 80 column text, with either 16 or 25 lines.\
+• No built in tape or printer.\
+• Support for multiple (up to 5) binary programs in RAM.
+
+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.
+
+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.
+
+Thanks to **John Shadbolt** and his [site](http://www.vintagecomputers.freeserve.co.uk/index.htm) for this information