64 KiB of instruction RAM, 96 KiB of data RAM
<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;ESP8266" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;ESP8266</a><p>For whatever reason the Make dead-tree-edition of the original article posted has a &quot;Table of Boards&quot; in it and they list the ESP8266 as having 1MB of &quot;Memory&quot;.<p>It&#x27;s also a new article.   It&#x27;s recently run in the February&#x2F;March 2016 edition of Make: Super (Cheap) Computers.<p>Edit: While the OPs link is not the new article, it is in the current edition of Make.  I was &#x2F;confused as I had picked it up in the airport and was looking into the ESP8266 referenced in it.