I have an MMC64 and then on the passthrough port I have put my old TFC3 (mostly to get the reset button, but also the fastloader is nice to have sometimes).
However, there seems to be some kind of strange incompatibilty problems. When I reset, the computer enters the MMC mode, and everything works fine. However if I press 'F7' to exit MMC64, I always get a lock-up. If I instead press shift-F7 then maybe one time of ten I get to the TFC3 menu, where I can then choose quite to basic. Once in BASIC everything works fine.
Any ideas?
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