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Floppy Disk Controller: Difference between revisions
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fixed a formatting issue
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However, using IO Port reads to generate delays (or polling MSR) leads to poor performance in a multitasking environment, and
you may want to put the driver to sleep for the shortest possible period (microsleep), instead.
=== Reliability ===▼
In real hardware, floppy drives are extremely unreliable. On emulators, it doesn't matter -- but for code that is intended for▼
real hardware, make sure to retry every command at least twice more after any error.▼
== Registers ==
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Note that code snippets and datasheets name these registers based on their trigrams (e.g. SRA, MSR, DIR, CCR, etc.).
Use standard "outb" and "inb" commands to access the registers.
▲== Reliability ==
▲In real hardware, floppy drives are extremely unreliable. On emulators, it doesn't matter -- but for code that is intended for
▲real hardware, make sure to retry every command at least twice more after any error.
The basic set of floppy registers can be found in the following enumeration:
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