website/content/museum/rca-system-00.md

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

title	categories	types	origins	years	cpus	params
RCA System 00	Computers	Home Computer	U.S.A.	1971	TTL components	name image company company_name specs tabs forum_thread photos links docs oc_id source System 00 /media/museum/photos/rca_system_00_1s.jpg /companies/rca RCA label value NAME System 00 label value MANUFACTURER RCA label value TYPE Home Computer label value ORIGIN U.S.A. label value YEAR 1971 label value BUILT IN LANGUAGE None label value KEYBOARD Hexadecimal keyboard label value CPU TTL components (mainly 7400 TTL chips) label value RAM 1 KB (64 KB max.) label value VRAM 128 bytes (from the 1KB RAM) are reserved for the display label value GRAPHIC MODES 32x32 or 16x64 label value COLORS black & white display label value SOUND None label value SIZE / WEIGHT 20 pounds label value I/O PORTS video output, switchbox connector, punched card reader connector label value BUILT IN MEDIA Punched card reader label value POWER SUPPLY Built-in label value PERIPHERALS Punched card reader, YES/NO switch box, oscilloscope video output photos links docs 1287 title subtitle text image RCA SYSTEM 00 Picture courtesy of Herb Johnson (www.retrotechnology.com) null title subtitle text image INSIDE SYSTEM 00 Picture courtesy of Herb Johnson (www.retrotechnology.com) null title subtitle text image SYSTEM 00 "FUN1" The System 00 was nicknamed "FUN1" at one time, surely shortly before Joseph Weisbecker used the FRED acronym instead (for Flexible Recreational and Educational Device). This picture shows the card reader and taper recorder on the left, and the display on the right. Picture courtesy of David Sarnoff library (digital.hagley.org) null title subtitle text image SYSTEM 00 with its card reader and video display. Picture courtesy of Joyce Weisbecker null title url text HAGLEY DIGITAL ARCHIVES https://digital.hagley.org/weisbecker Tons of documents about Joseph Weisbecker's works title url text retrotechnology.com http://www.retrotechnology.com/memship/cosmac_system_00.html A lot of info here title url cover text RCA SYSTEM 00 MANUAL http://www.hagley.org /media/museum/docs/couvs/rca_system_00_user-manual%5B1%5D.jpg [**RCA SYSTEM 00 MANUAL**](http://www.hagley.org)written by Joseph Weisbecker  compiled/archived by Hagley Museum and Library\  type of document : PDF\  size : 23 MB\  source : [COSMAC ELF website](http://www.cosmacelf.com/publications/books/system-00-manual-orig.pdf) 1322 url date https://web.archive.org/web/20230604183257/http://www.old-computers.com/museum/computer.asp?c=1322 2023-06-04

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.