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Seeking info - Motorola SC44125P microcontroller

Question asked by David Dahle on Apr 8, 2020
Latest reply on May 8, 2020 by David Dahle

I'm hoping someone can help me out with this vintage 1980s microcontroller - the Motorola SC44125P.

 

It is clearly an OEM version of a 6800-class microprocessor (see attached picture for pinout; the highlighted pins are those that differ from a stock MC6800).

 

The information I am after specifically:

 

Confirmation of which MC6800 variant this chip is based on (6800 / 6801 / 6805 / 6809 etc.), so I can look up the correct opcode table.

 

Presence and size of onboard ROM and method by which said ROM can be read out.

 

SC44125 pinout

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