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Re:The Texas Instruments 99/4: World’s First 16-Bit Computer by empressplay on Monday June 26, 2017 @11:22PM (#14642353)
I love the TI-99/4A but what about the SuperPet 9000? It had a second 16-bit CPU you could use (the 6809) in _the same address space_ as the 8-bit 6502 CPU!

http://www.old-computers.com/museum/computer.asp?c=675

Re:The Texas Instruments 99/4: World’s First 16-Bit Computer by ido on Tuesday June 27, 2017 @03:11AM (#14643093)
The 6809 was an 8 bit cpu (albeit an advanced one).