Ohio Scientific Challenger
(the very first one)
DigiBarn donor Jim Whelan stopped by one day in December 2004 to bring us this wonderful Ohio Scientific (OSI) Challenger, the first model in the Challenger series. He also brought the 500 board, which we believe is the basis for the subsequent models, the Challenger 2P, 4P etc. Included with this system donation was a Compuprint 912 printer using large rolls (so wide!) of that lovely silvery thermal paper (so quiet, so easy to photocopy). The Compuprint was used with the Challenger. Jim built the LED panel you can see on the front of the system to show the register instructions to easier debugging. This system has a low serial number, under 200, making is probably one of the first of the OSI computer systems. See our two pages of photos, audio of Jim describing the system and links to other OSI resources here and elsewhere below.
Listen to Jim Whelan talking about the first Ohio Scientific Challenger (8 MB MP3 file)
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