website/content/museum/ohio-scientific-challenger-ii.md

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

title	categories	types	origins	years	cpus	params
OHIO Scientific CHALLENGER II	Computers	Home Computer	U.S.A.	1978	6502	name image company company_name specs tabs forum_thread photos links docs related oc_id source CHALLENGER II /media/museum/photos/ohio-scientific_challenger2.jpg /companies/ohio-scientific OHIO Scientific label value NAME CHALLENGER II label value MANUFACTURER OHIO Scientific label value TYPE Home Computer label value ORIGIN U.S.A. label value YEAR 1978 label value BUILT IN LANGUAGE Microsoft BASIC interpreter label value CPU 6502 label value SPEED 1 or 2 Mhz. label value RAM 4 KB expandable up to 36 KB label value ROM 8 KB label value TEXT MODES 64 x 32 label value GRAPHIC MODES None label value I/O PORTS Tape, Monitor, Four Slots label value POWER SUPPLY internal P.S.U. label value PRICE $598 in assembled form photos links docs 62 title subtitle text image THE CHALLENGER II DISK SYSTEM Each Disk can store 250 KB. Unlike the Challenger IIP, the motherboard isn't in the keyboard case but in the box above the FDD. Two versions of the Challenger Disk System were available : the first one used a monitor and had a video output, the second one used a terminal and had a serial port (RS232 ?). This model doesn't use a specific operating system, but a special version of Basic (16 KB ROM on the disk controller) /media/museum/photos/challenger.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-1p /museum/ohio-scientific-challenger-4p /museum/ohio-scientific-challenger-iii /museum/ohio-scientific-superboard-ii 46 url date https://web.archive.org/web/20230528100235/http://www.old-computers.com/museum/computer.asp?c=46 2023-05-28

This computer is based on the MODEL 500 CPU board. It is actually a Super Kit (see Model 500) assembled with a cassette interface and a keyboard. OHIO Scientific presented two enhanced versions of the Challenger IIP : the Challenger II Disk Systems and the Challenger III.

The Disk System version came with 16 KB of RAM (expandable to 192 KB)instead of ROM BASIC and one or two 8'' F.D. drives. The disk BASIC was automatically loaded into the RAM. Up to 4 independant users could be connected simultaneously. The basic version with a single F.D. drive costed $1964.