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Raw Blame History

title, categories, types, origins, years, cpus, params

title

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types

origins

years

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OHIO Scientific Challenger 1P

Computers

Home Computer

U.S.A.

1979

6502

name

image

company

company_name

specs

tabs

forum_thread

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docs

oc_id

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Challenger 1P

/media/museum/photos/ohioscient_challenger1p_system_1.jpg

/companies/ohio-scientific

OHIO Scientific

label	value
NAME	Challenger 1P

label	value
MANUFACTURER	OHIO Scientific

label	value
TYPE	Home Computer

label	value
ORIGIN	U.S.A.

label	value
YEAR	1979

label	value
BUILT IN LANGUAGE	Microsoft BASIC

label	value
KEYBOARD	Full stroke 53 keys

label	value
CPU	6502

label	value
SPEED	1 MHz.

label	value
CO-PROCESSOR	None

label	value
RAM	4 KB (static) expandable to 8 KB on board

label	value
VRAM	1 KB

label	value
ROM	8 KB

label	value
TEXT MODES	24 chars. x 24 lines

label	value
GRAPHIC MODES	Only built-in graphic characters

label	value
COLORS	Monochrome

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SOUND	No sound

label	value
SIZE / WEIGHT	Unknown

label	value
I/O PORTS	Tape recorder (input/output jacks for 300 baud Kansas City Standard tape storage), Composite video

label	value
POWER SUPPLY	Built-in 5V power supply unit

label	value
PERIPHERALS	24 KB memory board, floppy discs

label	value
PRICE	About $350

photos

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docs

794

title	subtitle	text	image
BACK SIDE			/media/museum/photos/ohioscient_challenger1p_back_1.jpg

title	url	text
Web Wiz CAPTCHA	http://www.webwizcaptcha.com

title	url	cover	text
SUPERBOARD II / CHALLENGER 1P - USERS MANUAL	null	/media/museum/docs/couvs/challenger_user-manual.jpg	SUPERBOARD II / CHALLENGER 1P - USERS MANUAL\ written by Ohio Scientific compiled/archived by David Wilson\ type of document : PDF\ size : 2,7 MB\ source : www.old-computers.com

title	url	cover	text
THE 8K BASIC-IN-ROM - REFERENCE MANUAL	null	/media/museum/docs/couvs/doc_ohio-scientific_osi-basic.jpg	THE 8K BASIC-IN-ROM - REFERENCE MANUAL\ written by Ohio Scientific compiled/archived by David Wilson\ type of document : PDF\ size : 576 KB\ source : www.old-computers.com

title	url	cover	text
CHALLENGER 1P - TECHNICAL REPORT	null	/media/museum/docs/couvs/challenger-1p_technical-report.jpg	CHALLENGER 1P - TECHNICAL REPORT\ written by Ohio Scientific compiled/archived by David Wilson\ type of document : PDF\ size : 1,4 MB\ source : www.old-computers.com

title	url	cover	text
THE CHALLENGER CHARACTER GRAPHICS REFERENCE MANUAL	null	/media/museum/docs/couvs/challenger_characters-graphics-reference-manual.jpg	THE CHALLENGER CHARACTER GRAPHICS REFERENCE MANUAL\ written by Ohio Scientific compiled/archived by David Wilson\ type of document : PDF\ size : 1,3 MB\ source : www.old-computers.com

/museum/ohio-scientific-challenger-4p

/museum/ohio-scientific-challenger-ii

/museum/ohio-scientific-challenger-iii

/museum/ohio-scientific-superboard-ii

813

url	date
https://web.archive.org/web/20230206200042/http://www.old-computers.com/museum/computer.asp?c=813	2023-02-06

Ohio Scientific, based in Ohio, USA, were the makers of the Superboard II. The Challenger 1P and Challenger IIP-MF 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.

An optional floppy disk controller and a extra 24K of ram for this unit was available using a 610 expansion board.

The C1P-MF 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.

The Superboard and its derivatives had good user support and many programs were available.

Some additional information from Mark Alsing:
It 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.

Ken Jordan, a game developer who got his start on the OSI-C1P, reports :
The text mode was really 32 x 32, but because of TV overscan only 24 x 24 was used.
As was common, I soldered Atari joysticks to the numeric keys to allow gaming (there was a standard for this mod).

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Raw Blame History