[Coco] SDC not working with all my coco's

[rietveld rietveld]

Has anyone else noticed that some SDC's work with some cocos and some dont?

I have four SDC's.   Two will not work on my coco3 512 and coco3 2mB, but they will work on my coco3 128k as well as TDP100

The other two work on every machine

I tried them with SDC DOS 1.5 and 1.6.   Doesn't seem to work either way

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