Home > Systems Concepts

Later, Systems Concepts attempted to produce a compatible replacement for the DEC PDP-10 computers. This project was a legendary tragic failure, the archetypal Hacker Dream Gone Wrong. Mars was the code name for a family of PDP-10-compatible computers built by Systems Concepts, including the initial SC-30M, the smaller SC-25, and the slower SC-20. These machines were marvels of engineering design; although not much slower than the unique Foonly F-1, they were physically smaller and consumed less power than the much slower DEC KS10 or Foonly F-2, F-3, or F-4 machines. They were also completely compatible with the DEC KL10, and ran all KL10 binaries (including the operating system) with no modifications at about 2-3 times faster than a KL10.

When DEC cancelled the Jupiter project in 1983, Systems Concepts should have made a bundle selling their machine into shops with a lot of software investment in PDP-10s, and in fact their spring 1984 announcement generated a great deal of excitement in the PDP-10 world. TOPS-10 was running on the Mars by the summer of 1984, and TOPS-20 by early fall. Unfortunately, the hackers running Systems Concepts were much better at designing machines than at mass producing or selling them; the company allowed itself to be sidetracked by a bout of perfectionism into continually improving the design, and lost credibility as delivery dates continued to slip. They also overpriced the product ridiculously; they believed they were competing with the KL10 and VAX 8600 and failed to reckon with the likes of Sun MicrosystemsSun Microsystems is a Silicon Valley-based computer, semiconductor and software manufacturer. Sun's products include computer servers and workstations based on the SPARC processor, the SunOS and Solaris operating systems, the NFS network file system, the and other hungry startups building workstations with power comparable to the KL10 at a fraction of the price. By the time SC shipped the first SC-30M to StanfordFor other meanings of Stanford see Stanford (disambiguation). Stanford University is a privately funded university in Stanford, California. It is located approximately 35 miles southeast of San Francisco, in an unincorporated part of Santa Clara County ad in late 1985, most customers had already made the traumatic decision to abandon the PDP-10, usually for VMSCDE-based DECwindows GUI The OpenVMS ( Virtual Memory System) operating system (OS) is a multi-user, multiprocessing OS that was designed by Digital (now owned by Hewlett-Packard) for use in time sharing, batch processing, and transaction processing. or UnixUNIX (or Unix is a portable, multi-task and multi-user computer operating system originally developed by a group of AT&T Bell Labs employees including Ken Thompson, Dennis Ritchie and Douglas McIlroy. Unices The term Unices includes Unix and Unix-like ope boxes. Nevertheless, a number of Mars computers were purchased by CompuServeCompuServe was a major online service during the 1980s and 1990s before it was sidelined by the rise of GUI-based services such as America Online. One of the "big three" US based services, both The Source and GEnie were squeezed out of the market because, which depended on PDP-10s to run its online service and was eager to move to newer but fully-compatible systems. CompuServe's demand for the computers outpaced Systems Concepts' ability to produce them, so CompuServe licensed the design and built SC-designed computers itself.

SC later designed the SC-40, released in 19931993 is a common year starting on Friday and marked the Beginning of the International Decade to Combat Racism and Racial Discrimination (1993-2003 Events January January 1 Czechoslovakia divides. Establishment of independent Slovakia and Czech Republic., a faster follow-on to the SC-30M and SC-25. It can perform up to 8 times as fast as a DEC KL-10, and it also supports more physical memory, a larger virtual address spaceVirtual memory is a computer design feature that permits software to use more memory than the computer physically possesses. In technical terms, it allows software to run in a memory address space whose size and addressing are not necessarily tied to the, and more modern input/output devices. These systems were also used at CompuServe.

Systems Concepts remains in business, having changed its name to the SC Group when it moved from California to Nevada some years ago.