harddisk_io_control_status_register Union Reference

Hard disk I/O or Control based Status Register. More...

#include <harddisk_pio_mode_header.h>

Public Attributes
harddisk_io_control_status_register_fields	fields
	Fields of this union. More...
uint8_t	value
	Value of this union. More...

Detailed Description

Hard disk I/O or Control based Status Register.

Struct used to read from Status Register of I/O or Control port. Used to select a drive and/or head. Supports extra address/flag bits. Technically, when BSY is set, the other bits in the Status byte are meaningless. It is also generally a Bad Idea to test the "Seek Complete" (DSC) bit, because it has been deprecated and replaced by the newer SRV bit. Reading the Device Control Register port gets you the value of the Alternate Status Register, instead. The value of Alternate Status is always the same as the Regular Status port, but reading the Alternate Status port does not affect interrupts.

Member Data Documentation

fields

harddisk_io_control_status_register_fields harddisk_io_control_status_register::fields

Fields of this union.

value

uint8_t harddisk_io_control_status_register::value

Value of this union.

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The documentation for this union was generated from the following file:

• os/kernel/src/drivers/harddisk/harddisk_pio_mode_header.h