I'm a bit surprised though, and wonder why Apple went to so much trouble to >support Disk II Interface cards in slots 4 to 7 - but not 1 to 3!
Slots 1 and 2 were taken by the serial ports and slot 3 was taken by the 80-column firmware.Sure, that's the typical usage. It's just weird that Disk II Interface cards would have magically worked in the higher slots, and tragically crashed in the lower slots. They could've supported all slots without problem, so I wonder if they did it this way to free up bits in the speed register (unlikely) or free up transistors in the FPI (more likely I suppose).
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