XT-FDC project level of interest

[josephdaniel]

"Drive not ready" is actually PC-ese for "I issued an operation and it didn't complete in a set time". The FDC will hang if, say, an index signal is missing or the drive isn't spinning. "General failure" is a catchall and can be anything from "what I got back isn't what I expected" to "stupid controller's out to lunch".

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