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


Ready prompt T-shirts!

see details
ZX81 T-shirts!

see details
ZX Spectrum T-shirts!

see details
Spiral program T-shirts!

see details
Arcade cherry T-shirts!

see details
Atari joystick T-shirts!

see details
Battle Zone T-shirts!

see details
Vectrex ship T-shirts!

see details
Atari ST bombs T-shirts!

see details
Elite spaceship t-shirt T-shirts!

see details
Competition Pro Joystick T-shirts!

see details
C64 maze generator T-shirts!

see details
Moon Lander T-shirts!

see details
Pak Pak Monster T-shirts!

see details
BASIC code T-shirts!

see details
Pixel adventure T-shirts!

see details
Breakout T-shirts!

see details
Vector ship T-shirts!

see details

R > RCA > System 00   

System 00

The System 00 is an early computer constructed by Joseph Weisbecker around 1971-72, when he was working at RCA. His goal was to conceive an educational computer able to play games, so that children could easily experience and understand how a computer works. This idea later evolved in FRED systems, COSMAC computers and Studio II game system.

All logic circuits in the System 00 utilize 7400 series TTL chips. Though it contains no microprocessors, the general architecture of the System 00 eventually evolved into the RCA's COSMAC 1801 chip set, and later the single-chip COSMAC 1802.

The system case houses the logic circuits, power supply, input-output interfaces, 1024 bytes of memory and a control panel. This control panel is made of many switches for binary entries and operation controls, LEDs, buttons (RUN for example) and an hexadecimal keyboard (0-9, A-F).

Memory can be expanded to 64KB max. Word length is 8 bits. Two machine cycles of 1.6 us minimum are required per instruction, resulting in a max instruction execution rate of 300K operations per second. A direct memory access channel permits independent, asynchronous input/output up to 200K bytes/sec. An external program interrupt line is also provided.

Video display is made possible through an XYZ oscilloscope. Two display modes are available: 32x32 or 16x64 matrix of dots. This requires 128 bytes of memory from the 1024 bytes available. The 16x64 mode permits 4 lines of up to 10 characters per line in 5x7 dot format.

The System 00 can be connected to a card reader. Cards are 3"x5" punched card and only one can be read at a time. The cards are manually dropped into a top slot and read photoelectrically while falling. A card is divided in two tracks (A & B). Only one track is read at a time. The "A" track is read by dropping the card in the reader with the "A" arrow down. The card is then turned around for the "B" track to be read. Each track can contain up to 12 bytes. A manual card punch is also provided.

The system 00 can also use an auxiliary "yes/no" switch box for simplefied interactions with the system and programs by unsophisticated users. The state of these switches can be read by the programs.

Programs can be entered via the hexadecimal keyboard, entering first the less significant digit, followed by the most significant digit. Programs can also be loaded via the punch card reader.

We need more info about this computer ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.
Please consider donating your old computer / videogame system to or one of our partners from anywhere in the world (Europe, America, Asia, etc.).



NAME  System 00
TYPE  Home Computer
YEAR  1971
KEYBOARD  Hexadecimal keyboard
CPU  TTL components (mainly 7400 TTL chips)
RAM  1 KB (64 KB max.)
VRAM  128 bytes (from the 1KB RAM) are reserved for the display
GRAPHIC MODES  32x32 or 16x64
COLORS  black & white display
SIZE / WEIGHT  20 pounds
I/O PORTS  video output, switchbox connector, punched card reader connector
BUILT IN MEDIA  Punched card reader
PERIPHERALS  Punched card reader, YES/NO switch box, oscilloscope video output

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 RCA System 00 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) -