I'm trying to suss out TP0450, can't find much official documentation for it. US4361873 describes this chip but not in as much detail as for example the TI30 patent. The only certain thing I have for now is the microinstruction lanes, done by carefully tracing the lines and comparing them with TMS0980.
Rotate die photo so ROM is at lower-left, RAM is at upper-left. Microinstructions OR lanes left-to-right are:
NE C8 _YTP _NDMTP _DMTP _MTP _CKP AUTY AUTA _15TN _CKN _MTN _NATN _ATN CKM SSS _CIN STO CME SSE
