Click Here to visit our Sponsor
The History of Computing The Magazine Have Fun there ! Buy goodies to support us
  Mistake ? You have mr info ? Click here !Add Info     Search     Click here use the advanced search engine
Browse console museumBrowse pong museum


ZX81 T-shirts!

see details
Ready prompt T-shirts!

see details
ZX Spectrum T-shirts!

see details
Spiral program T-shirts!

see details
Atari joystick T-shirts!

see details
Arcade cherry T-shirts!

see details
Battle Zone T-shirts!

see details
Vectrex ship T-shirts!

see details
Competition Pro Joystick T-shirts!

see details
Moon Lander T-shirts!

see details
C64 maze generator T-shirts!

see details
Atari ST bombs T-shirts!

see details
Elite spaceship t-shirt T-shirts!

see details
Pak Pak Monster T-shirts!

see details
BASIC code T-shirts!

see details
Vector ship T-shirts!

see details
Pixel adventure T-shirts!

see details
Breakout T-shirts!

see details


OHIO Scientific

This board was used as a motherboard for the Challenger II.

Three Model 500 versions were sold:
500: The board.
500-1: Fully enclosed board with power supply, reset switch and two standard terminal connectors.
500-8: A 500 board in an eight slot Challenger case with power supply.

OHIO Scientific presented later an enhanced version called SuperKit. It was a 3 board-set with a Model 500 board without the serial interface, a video board, a 8 slot backplane board and a modified version of the BASIC ROM allowing a direct use of the video board. A TV set could be used with an optional RF aerial modulator

Please consider donating your old computer / videogame system to or one of our partners from anywhere in the world (Europe, America, Asia, etc.).


please i searche the spar part for this computer
osi (505 board and os65 v.3.3)

Friday 25th July 2003
daniel (france)


TYPE  Home Computer
YEAR  1977
CPU  6502
TEXT MODES  24 chars. x 24(?) lines
COLORS  Monochrome
I/O PORTS  Tape, Monitor, 1 expansion slot
PRICE  Model 500: $298 - SuperKit: $398

Please buy a t-shirt to support us !
Ready prompt
ZX Spectrum
Arcade cherry
Spiral program
Atari joystick
Battle Zone
Vectrex ship
C64 maze generator
Moon Lander
Competition Pro Joystick
Atari ST bombs
Elite spaceship t-shirt
Commodore 64 prompt
Pak Pak Monster
Pixel Deer
BASIC code
Shooting gallery
3D Cubes
Pixel adventure
Vector ship

Related Ebay auctions in real time - click to buy yours

see more OHIO Scientific  MODEL 500 Ebay auctions !

Click here to go to the top of the page   
Contact us | members | about | donate old-systems | FAQ
OLD-COMPUTERS.COM is hosted by - NYI (New York Internet) -