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O > OHIO SCIENTIFIC  > Challenger 1P


This mini forum is intended to provide a simple means of discussion about the OHIO Scientific  Challenger 1P computer. If you want to share your own experience or memories, or add relevant information about this system: post a message!

  Click Here to add a message in the forum


Sunday 3rd April 2016
Mike (Lovettsville, VA)

I have a OSI C1P II with the 610 and floppy. I also have all of the manuals and software for it. I am going to be selling and wanted to see if there was any interest in it before I put it on Ebay.

Wednesday 8th July 2015
harmon (Kent, Ohio USA)

I bought a superboard in 1979, my first computer. I learned software and hardware from it.
I upgraded to 32K and a floppy.
I designed and built an interface to a 3 voice sound chip and a TI "sprite" color graphics chip.
I showed my color c1p to the OSI club in Cleveland, a group of business users, and they wondered why anyone would need colors!

Thursday 18th December 2014
Dave Smith (USA)

HI, I was a technician back then and worked for OSI. I repaired many of these units. I am interested in purchasing some of the older units C1P, C2P, etc.

Sunday 22nd April 2012

My school (TSS, QLD) had a stack of these. Some had 1K, others had 4K, and we had one giant 8P machine with 2x 8" floppies.

I acquired them all when they were decommissioned. I''ve still got them.

Saturday 28th May 2005
Peter R Jensen (Sydney Australia)

I purchased a Superboard in 1979 and over the succeeding 4 years enhanced the machine until it ran two Fujitsu 8 inch drives each having a 1.2 megabyte capacity. The controller was built for me by Nigel Bisset who was a member of the Sydney user group for Ohio Scientific machines. In addition to this change, the Melbourne users produced a memory expansion board and video upgrade which I also used. An aluminium case was bent up and all the hardware went inside and an black text on green background sat on the case. It did not look so very different to the setup that I am now using for Internet communications except that of course it is colour and XVGA.

The end result was a machine that was able to do wordprocessing using the Ohio Scientific programme and I started writing my first book that has still not been published. Later books were more successful.

However, I found the wordprocessor was pretty flakey and I lost a number of important files. This persuaded me to switch to an Osborne 01 Greycase on which I could run Wordstar which was a quantum leap. About this time, Nigel Bisset went to a Macintosh and at this stage our computer paths diverged. He went on to use Apple products whereas I went progressively via CPM to MSDOS and ultimately Windows XP. What a change in 25 yea rs - absolutely incredible.

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