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That said, to my knowledge, cracked games generally work fine-ish.
That also said, that mid-instruction-interruptible 68k core is going to be necessary for emulating the DTACK line. More broadly, that includes some 68k-based Macs and all of the CD-i players that used an MCU dubbed 'SLAVE' (Philips's term, not mine) for I/O.
Apparently, the MCU will yank the /DTACK line on the SCC68070 (a 68000-based SoC) to go "Whoa, hold on a minute bro" via GPIO port B whenever a write or read to GPIO port A occurs.
I'm confused. Holding DTACK/ unasserted (high) doesn't interrupt the program, it just prevents the memory cycle from completing until DTACK/ is asserted (low). It's like WAIT on other processors. Why would you need an instruction-interruptible core to emulate that?
That said, I think the 68070 does have bus and address error recovery by stack puke like the 68010. It doesn't use the actual 68000 core.
Oof, yeah that’s a fun one
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