yann64andClaude Opus 5.5
b274874139
1,289 discussions, 9,527 archived comments; pages no longer carry the comments themselves. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ
149 lines
4.8 KiB
Markdown
149 lines
4.8 KiB
Markdown
---
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title: OHIO Scientific Challenger 1P
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categories:
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- Computers
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types:
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- Home Computer
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origins:
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- U.S.A.
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years:
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- '1979'
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cpus:
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- '6502'
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params:
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name: Challenger 1P
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image: /media/museum/photos/ohioscient_challenger1p_system_1.jpg
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company: /companies/ohio-scientific
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company_name: OHIO Scientific
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specs:
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- label: NAME
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value: Challenger 1P
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- label: MANUFACTURER
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value: OHIO Scientific
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- label: TYPE
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value: Home 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: '1979'
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- label: BUILT IN LANGUAGE
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value: Microsoft BASIC
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- label: KEYBOARD
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value: Full stroke 53 keys
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- label: CPU
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value: '6502'
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- label: SPEED
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value: 1 MHz.
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- label: CO-PROCESSOR
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value: None
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- label: RAM
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value: 4 KB (static) expandable to 8 KB on board
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- label: VRAM
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value: 1 KB
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- label: ROM
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value: 8 KB
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- label: TEXT MODES
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value: 24 chars. x 24 lines
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- label: GRAPHIC MODES
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value: Only built-in graphic characters
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- label: COLORS
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value: Monochrome
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- label: SOUND
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value: No sound
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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: Tape recorder (input/output jacks for 300 baud Kansas City Standard tape storage), Composite video
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- label: POWER SUPPLY
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value: Built-in 5V power supply unit
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- label: PERIPHERALS
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value: 24 KB memory board, floppy discs
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- label: PRICE
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value: About $350
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tabs:
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- photos
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- links
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- docs
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forum_thread: 794
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photos:
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- title: BACK SIDE
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subtitle: ''
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text: ''
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image: /media/museum/photos/ohioscient_challenger1p_back_1.jpg
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links:
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- title: Web Wiz CAPTCHA
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url: http://www.webwizcaptcha.com
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text: ''
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docs:
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- title: SUPERBOARD II / CHALLENGER 1P - USERS MANUAL
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url: null
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cover: /media/museum/docs/couvs/challenger_user-manual.jpg
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text: |-
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**SUPERBOARD II / CHALLENGER 1P - USERS MANUAL**\
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written by Ohio Scientific
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compiled/archived by David Wilson\
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type of document : PDF\
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size : 2,7 MB\
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source : www.old-computers.com
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- title: THE 8K BASIC-IN-ROM - REFERENCE MANUAL
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url: null
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cover: /media/museum/docs/couvs/doc_ohio-scientific_osi-basic.jpg
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text: |-
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**THE 8K BASIC-IN-ROM - REFERENCE MANUAL**\
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written by Ohio Scientific
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compiled/archived by David Wilson\
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type of document : PDF\
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size : 576 KB\
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source : www.old-computers.com
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- title: CHALLENGER 1P - TECHNICAL REPORT
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url: null
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cover: /media/museum/docs/couvs/challenger-1p_technical-report.jpg
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text: |-
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**CHALLENGER 1P - TECHNICAL REPORT**\
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written by Ohio Scientific
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compiled/archived by David Wilson\
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type of document : PDF\
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size : 1,4 MB\
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source : www.old-computers.com
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- title: THE CHALLENGER CHARACTER GRAPHICS REFERENCE MANUAL
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url: null
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cover: /media/museum/docs/couvs/challenger_characters-graphics-reference-manual.jpg
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text: |-
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**THE CHALLENGER CHARACTER GRAPHICS REFERENCE MANUAL**\
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written by Ohio Scientific
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compiled/archived by David Wilson\
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type of document : PDF\
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size : 1,3 MB\
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source : www.old-computers.com
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related:
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- /museum/ohio-scientific-challenger-4p
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- /museum/ohio-scientific-challenger-ii
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- /museum/ohio-scientific-challenger-iii
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- /museum/ohio-scientific-superboard-ii
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oc_id: 813
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source:
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url: https://web.archive.org/web/20230206200042/http://www.old-computers.com/museum/computer.asp?c=813
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date: '2023-02-06'
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---
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Ohio Scientific, based in Ohio, USA, were the makers of the Superboard II. The Challenger 1P and Challenger **IIP-MF** were essentially cased versions of this single board system with integrated keyboard, a single 5Volt power supply and the first 6502 version of Microsoft BASIC interpreter.
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An optional floppy disk controller and a extra 24K of ram for this unit was available using a 610 expansion board.
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The **C1P-MF** was an upgraded version of the C1P having 20 KB of RAM and one 90 KB floppy disc drive. Memory could be upgraded up to 32 KB.
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The Superboard and its derivatives had good user support and many programs were available.
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---
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Some additional information from **Mark Alsing**:\
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It had basic keyclick sound capability that could be added by popultaing components (resitors and caps) on the main board.An RS-232 interface could also be added this way and there was a cut-out on the back to mount a DB-25 connector for it. Video output was composite and required an RF modulator to display output on a regular TV. I had a MicroVerter box that put the output on ch. 13 or 14.
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**Ken Jordan**, a game developer who got his start on the OSI-C1P, reports :\
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The text mode was really 32 x 32, but because of TV overscan only 24 x 24 was used.\
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As was common, I soldered Atari joysticks to the numeric keys to allow gaming (there was a standard for this mod).
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