I have the emulator running nicely on an Amiga 500 1.3 with 1mb ram (fairly basic amiga), some games which load via amiga dos ie Mercenary ,Sidewinder etc get half way through loading and disk not found message appears, could be a timing issue or maybe could answer my own question in thinking it might be a bug between 1.2 and 1.3 kickstarts.
Anyone tried these on a 1.3 machine, using the tosec images and tried 2 different versions of Mercenary and they both failed at similar points in loading.
Jumpers have been tested to be correct as tried both df0: positions incase it was a simple jumper error.
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