Ohio Scientific

Model: Ohio Scientific Challenger 4P
Year: 1979
Processor: 6502 @ 2MHz
ROM: 8KB BASIC + OSI Monitor
Video: 64 characters, 32 lines monochrome ASCII w/ extended character set
Sound: Tone generato
OS: OSI BASIC V2 Rev 3.2?

  502 top 502 underside 540 detail 540 oblique 542 detail 542 top back panel left back panel right  

  backplane1 backplane2 backside improved c4p cleaned up keyboard mess of wires nopsu oldpsu  

  on screen overview primer psu improved running again runningbasic screen garbage side view improved  

  side view softwarehaul softwarepages1 tapes top view improved workbench  


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