Another interesting TMS MCU to dump/decap might be in the Capsella CRC 2000 (https://en.wikipedia.org/wiki/Capsela)

My audio dev friend Chris Randall has posted a photo of his acquisition here:
https://instagram.com/p/4f0PQPn6eX
https://instagram.com/p/4h84nCH6bd

Asked him to open it to know what sort of MCU it had, and from the photo, I'm pretty sure its a TMS1400 or similar (same pinout and markings as my Coleco Talking Teacher)

Photo credits: Chris Randall