found it in this MAC-16 ad https://adspast.com/store/customer/product.php?productid=62927 On 3/3/20 4:18 PM, Jules Richardson via cctalk wrote: > > > Hopefully collective wisdom can help on this one - does anyone have a clue what system this core board was from: > http://www.classiccmp.org/acornia/tmp/coresmall.jpg