{
    "type_id": 1,
    "id": 813,
    "pages": {
        "photos": "photos.asp?t=1&c=813&st=1",
        "links": "links.asp?c=813&st=1",
        "docs": "docs.asp?c=813&st=1",
        "comments": "forum.asp?c=813&st=1"
    },
    "image": "https://www.old-computers.com/museum/photos/OhioScient_Challenger1P_System_1.jpg",
    "company_link": "company.asp?st=1&m=94",
    "company_name": "OHIO Scientific",
    "company_logo": "https://www.old-computers.com/museum/logos/Ohio_Scientific_Logo.gif",
    "description": "Ohio Scientific, based in Ohio, USA, were the makers of the Superboard II. The Challenger 1P and Challenger <b>IIP-MF</b> 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.\nAn optional floppy disk controller and a extra 24K of ram for this unit was available using a 610 expansion board.\nThe <b>C1P-MF</b> 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.\nThe Superboard and its derivatives had good user support and many programs were available.\n_______________________\nSome additional information from <b>Mark Alsing</b>:\n<font color=\"#666666\">\nIt 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.</font>\n\n<b>Ken Jordan</b>, a game developer who got his start on the OSI-C1P,  reports :\n<font color=\"#666666\">\nThe text mode was really 32 x 32, but because of TV overscan only 24 x 24 was used.\nAs was common, I soldered Atari joysticks to the numeric keys to allow gaming (there was a standard for this mod).</font>",
    "name": "Challenger 1P",
    "manufacturer": "OHIO Scientific",
    "type": "Home Computer",
    "origin": "U.S.A.",
    "year": "1979",
    "built_in_language": "Microsoft BASIC",
    "keyboard": "Full stroke 53 keys",
    "cpu": "6502",
    "speed": "1 MHz.",
    "co_processor": "None",
    "ram": "4 KB (static) expandable to 8 KB on board",
    "vram": "1 KB",
    "rom": "8 KB",
    "text_modes": "24 chars. x 24 lines",
    "graphic_modes": "Only built-in graphic characters",
    "colors": "Monochrome",
    "sound": "No sound",
    "size_weight": "Unknown",
    "io_ports": "Tape recorder (input/output jacks for 300 baud Kansas City Standard tape storage), Composite video",
    "power_supply": "Built-in 5V power supply unit",
    "peripherals": "24 KB memory board, floppy discs",
    "price": "About $350",
    "photos": [
        {
            "name": "Back side ",
            "image": "https://www.old-computers.com/museum/photos/OhioScient_Challenger1P_Back_1.jpg",
            "description": ""
        }
    ],
    "links": [
        {
            "url": "computer.asp?st=1&c=572",
            "name": "OHIO Scientific - CHALLENGER 4P"
        },
        {
            "url": "computer.asp?st=1&c=46",
            "name": "OHIO Scientific - CHALLENGER II"
        },
        {
            "url": "computer.asp?st=1&c=47",
            "name": "OHIO Scientific - CHALLENGER III"
        },
        {
            "url": "computer.asp?st=1&c=860",
            "name": "OHIO Scientific - Superboard II"
        }
    ]
}

{
    "id": "Ohio Scientific Challenger 1P - Games",
    "name": "Ohio Scientific Challenger 1P - Games",
    "altNames": [
        "Ohio Scientific Challenger 1P"
    ]
}