Detecting inserted floppy drive WAS: Raymond Check discusses MS DOS Floppy Disk Cache

Fred Cisin cisin at
Wed Oct 2 17:15:03 CDT 2019

Sorry, I was assuming the previous discussion!

This implies that some newer drives actually had a "disk present" signal, 
or wouldn't let you close the door without a disk, but had a door signal.

Rather than an "unnecessary" training insertion, couldn't the testing of 
drive type have simply waited until first actual use?
(a 5.25 would have shown write-protect while the disk was half in.)

Whether or not a drive had "DRIVE-READY" was not reliable enough, unless 
you deprecated use of old drives, . . .

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