Still working on my #D8749H #microcontroller... My programmer does not support it (only the #87C51 series), but I have discovered it can use external ROM. So, I need a clock, glue logic and some ROM.

I like to turn hardware problems into software ones, so I am programming an #ArduinoNano to do everything... First I need a 1MHz clock, and just look at this, I have it! A little amazed, but also pleased at how clean it is! To be pedantic, the scope says 999.382KHz 😋

#retrocomputing