DSK_DISKETTECONTROL (5Dh) - Command Information

Command Information

Indicates whether the application is requesting or returning exclusive ownership of the diskette controller, or querying the diskette device driver.

Bits 0-1

Description
00
Resume - This IOCtl resumes processing of diskette requests by the diskette driver.
01
Suspend - When this IOCtl returns without error, the diskette driver will have relinquished control of the diskette hardware, including the IRQ level. Further requests to the diskette device from the operating system will be queued.
10
Query - This IOCtl indicates whether the diskette driver is idle (no pending requests in the device driver queue). A return code of 0 (NO_ERROR) indicates the device driver is idle.

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