About the 1802 Olduino
The Olduino is a retro-Arduino. It uses an RCA 1802 processor from the 1970s but adds hardware and software so it can function like an arduino and use some arduino add-on shields. The Olduino is more limited than an Arduino but that is part of the fun. The Olduino has 9 dedicated output pins and 4 inputs. It lacks(so far) analog input and output capability but can still use many basic shields. The Olduino has hardware support for high speed SPI(Serial Peripheral Interface) through a set of shift registers on the olduino board. It can do high-speed serial communications to an attached PC through an onboard AVR slave processor. 
Some of the Olduino projects and capabilities are shown below:
The Olduino is based on Lee Hart’s Membership Card 1802 computer http://www.retrotechnology.com/memship/memship.html and my LCC1802 C compiler: http://sites.google.com/site/lcc1802/
There’s a lively interest group for the 1802 at http://www.cosmacelf.com/ and https://groups.io/g/cosmacelf
My name is Bill Rowe. I built my first home computer in the 1970’s from the Popular Electronics article. I got out of hardware hacking in the 1980’s but came back when somebody gave me an Arduino in 2008. When Lee Hart made the little Membership Card I thought “Hmmm Olduino?” The Olduino has been through several generations of hardware and software and boasts its own C compiler. I have enough development plans to keep the project going for a while. You can reach me through the form below or directly as bill_rowe_ottawa at hotmail.com.
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