It would be good if the autostart handling for "Handle True Drive Emulation on autostart" would not bail out on an EOF if the file hasn't even started loading.
This behaviour is controlled by two callbacks, an attention trap callback, and a eof trap callback. The attention trap does not distinguish what kind of command the attention matches so if a cartridge loader issues an M-R for drive detection, that is interpreted as a start of loading, and the response and and eof, prematurely enabling True Drive Emulation.
An easy way to fix this is to actually provide the type of attention from the attention trap callback. That routine already knows if this was an open, so it should be easy to add in there.
