IBM R61 VGA SHARE LENOVO Schematic Circuit Diagram
IBM R61 VGA SHARE LENOVO Schematic Circuit Diagram
Micro Instrumentation and Telemetry Systems
Micro Instrumentation and Telemetry Systems was the original name of the company founded in 1969 by Ed Roberts and various collaborators to manufacture and sell instruments and transmitters for model rockets. Ed Roberts became the sold ownership in the early 1970s, after which he designed the Altair. By January 1975, when the Altair was discovered, the company was called MITS, Inc., which then stand for nothing more than the name of the company. In 1977, Roberts sold MITS to Pertec, moved to Georgia, went to medical school, and join as a practicing physician. Thought by many persons Roberts to be the "father of the personal computer".
Birth of the Personal Computer
The Altair built an open architecture system bus later called the S-100 bus and had 100 pins per slot. This architecture name became an industry standard. The S-100 bus was widely used by other computers that were similar to the Altair, such as the IMSAI 8080, which was featured in the movie WarGames. The S-100 bus opensource architecture means that anybody can develop the boards to fit in these slots and be included in the system, and it confirmed a high level of cross-compatibility between different motherboard boards and systems. The companies were inspired by the popularity of 8080 processor-based systems to write programs, including the control program for microprocessors (CP/M) operating system (OS) and the 1st version of the Microsoft Beginners All-purpose Symbolic Instruction Code (BASIC) programming language.
IBM introduced the first personal computer in 1975. The Model 5100 had 16KB of memory, a built-in 16-line by 64-character display, a built-in BASIC language translator, and a built-in DC-300 cartridge tape drive for storage. The system’s $8,975 price was fixed for the personal computer marketplace, which was dominated by experimenters affectionately referred to as hackers who built low-cost kits ($500 or so) as a hobby. Obviously, the IBM system was not in competition for this low-cost market for selling the system with expected price.
