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
122 lines
4.1 KiB
Markdown
122 lines
4.1 KiB
Markdown
---
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title: OHIO Scientific CHALLENGER II
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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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- '1978'
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cpus:
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- '6502'
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params:
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name: CHALLENGER II
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image: /media/museum/photos/ohio-scientific_challenger2.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 II
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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: '1978'
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- label: BUILT IN LANGUAGE
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value: Microsoft BASIC interpreter
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- label: CPU
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value: '6502'
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- label: SPEED
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value: 1 or 2 Mhz.
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- label: RAM
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value: 4 KB expandable up to 36 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: 64 x 32
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- label: GRAPHIC MODES
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value: None
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- label: I/O PORTS
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value: Tape, Monitor, Four Slots
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- label: POWER SUPPLY
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value: internal P.S.U.
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- label: PRICE
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value: $598 in assembled form
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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: 62
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photos:
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- title: THE CHALLENGER II DISK SYSTEM
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subtitle: ''
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text: 'Each Disk can store 250 KB. Unlike the Challenger IIP, the motherboard isn''t in the keyboard case but in the box above the FDD. Two versions of the Challenger Disk System were available : the first one used a monitor and had a video output, the second one used a terminal and had a serial port (RS232 ?). This model doesn''t use a specific operating system, but a special version of Basic (16 KB ROM on the disk controller)'
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image: /media/museum/photos/challenger.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-1p
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- /museum/ohio-scientific-challenger-4p
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- /museum/ohio-scientific-challenger-iii
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- /museum/ohio-scientific-superboard-ii
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oc_id: 46
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source:
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url: https://web.archive.org/web/20230528100235/http://www.old-computers.com/museum/computer.asp?c=46
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date: '2023-05-28'
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---
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This computer is based on the MODEL 500 CPU board. It is actually a Super Kit (see [Model 500](/museum/ohio-scientific-model-500/)) assembled with a cassette interface and a keyboard. OHIO Scientific presented two enhanced versions of the Challenger IIP : the Challenger II Disk Systems and the [Challenger III](/museum/ohio-scientific-challenger-iii/).
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The Disk System version came with 16 KB of RAM (expandable to 192 KB)instead of ROM BASIC and one or two 8'' F.D. drives. The disk BASIC was automatically loaded into the RAM. Up to 4 independant users could be connected simultaneously. The basic version with a single F.D. drive costed $1964.
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