There's a Motorola document about this: https://ia904706.us.archive.org/5/items/Motorola-SeminarsandApplicationBooksDC-001VirtualMemoryUsingTheMC68000AndTheMC6

There's a Motorola document about this: https://ia904706.us.archive.org/5/items/Motorola-SeminarsandApplicationBooksDC-001VirtualMemoryUsingTheMC68000AndTheMC68451MMU/Motorola-SeminarsandApplicationBooksDC-001VirtualMemoryUsingTheMC68000AndTheMC68451MMU_text.pdf https://ia904706.us.archive.org/5/items/Motorola-Seminarsand... In there they suggest that "another bus master must perform this action" and that this one could be "an MC68000 MPU as well". I've also heard and seen the claim that Apollo workstations before the 68010 used this method, but it's difficult to find a definite source for this (though it's likely true. Every reference etc. to the pre-DN300 models claim 2x68000 CPU)