The COSMAC “ELF” was a microcomputer design by Joseph Weisbecker that was announced in the pages of the August edition of Popular Electronics . This is an implementation of the COSMAC Elf, constructed in going by the issues of Popular Electronics, with additional articles in March and July Popular Electronics was famous for the article introducing the Altair ran on building a very simple computer called the COSMAC ELF.

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You have all the information you need to build your own Elf from scratch, but Spare Time Gizmos can make your life easier by selling you a beautiful Populaar board that will make wiring a snap. Six TIL displays for a full address and data display. In August of Joseph Weisbecker introduced a new microcomputer to the world in the pages of Popular Electronics magazine.

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In AugustNuts and Volts magazine, along with Spare Time Gizmosreleased a project elv build the “Cosmac Elf ,” based on the original Elf, with some newer and easier to find components and enhanced features, modules, and functionality, including the STG Pixie Graphics Replacement board that is functionally equivalent to the now-rare RCA CDP integrated circuit.

But the VIC out performs both those computers with the same If you can’t wait, then the schematics for everything are in the back of the Elf User’s Manual and the Cosmmac is here. Other, similar information and hobbyist software projects can be found on the Internet.

You can communicate with the computer in a relatively coxmac language. The important differences are how fast; and how much memory it takes. File dumps of these games can be found on the Internet.


You are commenting using your Facebook account. The is very simple to interface from a hardware point of view and has a very easy to learn machine language — a very small, very regular instruction set.

History | COSMAC ELF

The Z80 gives me lots of compilers dosmac cross assemblers to play with. With only bytes of memory to start with, things were becoming a little tight, so Weisbecker went on to describe the construction of a 1, byte memory expansion.

It also featured an outer interpreter, which allowed users to work interactively with their computers. By manipulating the DMA pointer, software could create the appearance of lower vertical resolutions. Any programs you toggle electroncis or download today will still be there tomorrow!

The group’s bimonthly newsletter, Ipso Factoran up to several dozen pages in length and soon attracted an international following. It is an excellent hardware eletcronics software trainer that uses machine language and can be easily expanded to do just about anything a full-blown microcomputer can.

The diversity of systems was an occasional source of frustration popuoar members. A series of newsletters and small booklets offered by Netronics and Quest contained machine language and CHIP-8 programs, along with schematics for expanding the Elf and adding peripherals, including a light pen. I struggled with the assembly language. People built serial interfaces out of one of the input lines and the output line.

The code is still out there on the internets somewhere. By using this site, you agree to the Terms of Use and Privacy Policy.

COSMAC ELF – Wikipedia

It was radiation hardened on purpose to be used on space probes and it was used on space probes because it was the first CMOS CPU available on market. The is a great processor to play with. You’ll find that the complete schematics and parts lists for the Elf and all option boards are in the back of the User’s Manual.


Still more systems were built based on thethough these are somewhat more obscure.

This code was then processed by a very lean inner interpreter, yielding an execution speed far greater than that provided by Tiny Basic. A Cosjac interpreter, also written by Mike Riley.

Vintage COSMAC Elf is Pretty Close to Original

With the commercial offerings as well as the Popular Electronics introduction to based computing, the formation of users groups was inevitable. But there are definitely times when you do need cosjac stack, so another register is used for that. A “memory protect” switch could be used to disable memory alteration. A monitor written by Spare Time Gizmos which provides hardware diagnostics, program debugging and downloading features.

Switches mounted on a separate piece of plastic or aluminum, like the original ELF, that connect to a header on the Elf PC board. Worked fine, back in the day when digital timers cost hundreds of bucks. I generally don’t answer such emails.