yann64andClaude Opus 5.5
c913d792c4
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ
95 lines
3.5 KiB
Markdown
95 lines
3.5 KiB
Markdown
---
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title: IMSAI PCS 80
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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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- '1977'
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cpus:
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- Intel 8080 - IMSAI PCS 80
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params:
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name: PCS 80
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image: /media/museum/photos/imsai0.jpg
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company: /companies/imsai
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company_name: IMSAI
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specs:
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- label: NAME
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value: PCS 80
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- label: MANUFACTURER
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value: IMSAI
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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: '1977'
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- label: BUILT IN LANGUAGE
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value: None
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- label: KEYBOARD
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value: Video terminal
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- label: CPU
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value: Intel 8080 - IMSAI PCS 80/30 came with
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- label: SPEED
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value: 3 MHz
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- label: RAM
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value: 2.25 KB (up to 64 KB thanks to RAM boards, there are 4K, 16K, 32K and 64K memory expansion boards).
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- label: ROM
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value: 3 KB (Including monitor)
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- label: TEXT MODES
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value: 12x40, 12x80, 24x40 and 24x80 (128 characters of either 5x7 or 7x10 dot matirx fonts)
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- label: I/O PORTS
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value: Serial ports (2) - Parallel Port (1) - Monitor - S100 Bus (8 expansion slots)
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- label: OS
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value: 8K DOS based upon CP/M
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- label: POWER SUPPLY
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value: built-in 28AMP power supply unit
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- label: PERIPHERALS
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value: Floppy drives inteface, Single or dual 8'' drives in a separate housing same size as main frame unit
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tabs:
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- photos
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photos:
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- title: THE PCS-80 COMPONENTS
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subtitle: ''
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text: ''
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image: /media/museum/photos/imsai_pcs80_components_1.jpg
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- title: THE PCS 80 MODEL 15
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subtitle: ''
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text: ''
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image: /media/museum/photos/imsai_pcs80_model15_1.jpg
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- title: THE PCS-80 MODEL 30
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subtitle: ''
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text: ''
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image: /media/museum/photos/imsai_pcs80_mod30_1.jpg
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comments:
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- author: Lawrence Shadai (United States)
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date: Tuesday 31st December 2019
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text: 'IIRC: A heavily modified PCS-80 was used by Rob Barnaby to develop WordStar. Modifications (as I can best tell) included an inverse video board ("Black on White" instead of the regular "While on Black") and 5.25 Inch dual floppy disks with an external monitor. Currently located at DigiBarn, it no longer has the inverse video board. I could be mistaken, but this looks like the very same model.'
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- author: j4kc (a)
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date: Wednesday 6th April 2005
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text: yes, they used an IMSAI in war games but not this one, they use the 8080
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- author: Matt (Earth)
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date: Tuesday 21st December 2004
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text: |-
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Did they use this kind of computer in War Games ?\
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Would like to know because I saw a IMSAI floppy system. Thanks,Matt
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oc_id: 342
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source:
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url: https://web.archive.org/web/20230608155226/http://www.old-computers.com/museum/computer.asp?c=342
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date: '2023-06-08'
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---
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The PCS 80 came with a lot of peripherals: line and character printers, CRT terminals, intelligent keyboards, ACR storage, 8" and 5.25" floppy disks and with several languages: TTY BASIC with OS, 4K, 8K and 12K BASIC, audio cassette BASIC with OS, & a scientifically oriented disk BASIC and level 2 Fortran IV compiler.
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**Greg Bober** stil have an extended working configuration including:\
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• External 5.25" quad density 380Kb Micropolis floppy with BASIC,\
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• Faster memory & "I" tempgrade CPU, speed could goto 7MHz,\
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• 58K 10MHz RAM,\
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• Custom boot operating system,\
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• 64K of extended RAM/ported PROM containing the DOS & BASIC operating system to have 1 second versus 30 second floppy boot up,\
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• Extrernal 12" monitor since 24x80 is hard to see on tiny screen,\
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• Spare parts.\
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Numerous photos of his system may be seen [here](http://www.smallscalerailway.com/PCS80%20IMSAI.htm).
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