If you threw together your own ELF back in the 70s, odds are good that you were motivated by fun more than anything else. Captain Cosmo's Whizbang is an entertaining collection of articles and meanderings that really captures the spirit of the day. Jeff went on to professionally edit and author many other magazines, stories, and books. We're grateful to him for making this available to the world once again. Over 30 years later, it's still a fun read!
One of the authors, Juergen Pintaske, scanned this one in. Juergen is a former Microprocessor Applications Engineer with RCA in Brussels. (Paul Sferazza of Intersil kindly granted permission for cosmacelf.com to publish this PDF for the community.)
This collection of application notes was culled from RCA's Solid State News and published in July of 1981. (Permission granted by Paul Bernkopf, Intersil Legal Dept., July 1, 2013.)
This may well be the best tutorial on 1802 programming ever written. Without resorting to technical jargon, Pittman introduces microprocessor features and instructions, with hands-on experiments each step of the way. We're proud to reproduce this work here with the author's help and permission. Thanks go also to Lee Hart, who meticulously translated the OCR scans to HTML for publication.
The day of the 1802 had passed, yet space probes such as Galileo continued to function decades later. The longevity of such projects presents challenges in retaining intimate knowledge of systems that cannot be replaced or upgraded once deployed. In this July 2003 paper prepared for NASA's Jet Propulsion Laboratory, Steve and Michael Gemeny explore the resurrection of a COSMAC ELF and an HP 2000 minicomputer for lessons applicable to the New Horizons mission to Pluto. (Published on cosmacelf.com by permission of Steve Gemeny of Johns Hopkins University, Applied Physics Laboratory.)
The link above will take you to Tom Swan’s website, where this eBook is available for purchase. With a readable, casual style, Tom starts out with a good tour through number systems and binary arithmetic, then begins his introduction to 1802 assembly language. With the overall framework in place, the book then discusses each instruction of the 1802 in detail, with frequent usage tips. The main text of the book concludes with detailed source code for the author’s own assembler/disassembler program, but an appendix collects some useful subroutines. Please support the author and do not upload this eBook to the internet.
This user manual tells you everything you wanted to know about a system that you probably don’t have, including use of its UT20 monitor software. A commented listing of UT20 is provided in an appendix. A downloadable version of UT20 may be found on the Software page. (Permission to publish this manual on cosmacelf.com was granted by Paul Bernkopf, Intersil Legal Dept., July 1, 2013.)
In 1971, before RCA produced its first microprocessors, Joseph Weisbecker was prototyping his ideas for an 8-bit microprocessor using 7400-series TTL logic. This is the manual for that prototype, provided courtesy of the Hagley Museum and Library. In his book “Inventing the PC: The MCM/70 Story,” author Zbigniew Stachniak documents this as being the “first incarnation” of Weisbecker’s concept of a home computer (Stachniak contributed some photos of System 00 here). The System 00 manual is available as a searchable PDF, or a smaller non-searchable PDF. (Permission to publish this on cosmacelf.com granted by the Hagley Museum and Library on July 18, 2016; see the cover page of the document for further details.)