On Fri, May 25, 2018 at 1:58 PM, Adrian Graham via cctalk < cctalk@classiccmp.org> wrote:
> Hi folks, > > A friend of mine has said ADM-3A and is baffled by the tiny board it > contains, not the usual ‘covering entire base’ discrete logic board they > normally have. Centre of this board is the Nat Semi NS405 ‘display > processor on a chip’ which is obviously why the board is so small but > neither of us have seen this before in a 3A. > > Anyone else? Pic at http://www.binarydinosaurs.co.uk/tonyADM3a.jpg < > http://www.binarydinosaurs.co.uk/tonyADM3a.jpg> > That's the Zentec ADM3 retrofit: http://bitsavers.trailing-edge.com/pdf/zentec/Zentec_ADM3_Retrofit/