Enrico Fraccaroli
45 lines
1.8 KiB
C
45 lines
1.8 KiB
C
/// MentOS, The Mentoring Operating system project
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/// @file fdc.h
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/// @brief Definitions about the floppy.
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/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
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/// See LICENSE.md for details.
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#pragma once
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/// @brief Floppy Disk Controller (FDC) registers.
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typedef enum fdc_registers_t {
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STATUS_REGISTER_A = 0x3F0,
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///< This register is read-only and monitors the state of the
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///< interrupt pin and several disk interface pins.
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STATUS_REGISTER_B = 0x3F1,
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///< This register is read-only and monitors the state of several
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///< isk interface pins.
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DOR = 0x3F2,
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///< The Digital Output Register contains the drive select and
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///< motor enable bits, a reset bit and a DMA GATE bit.
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TAPE_DRIVE_REGISTER = 0x3F3,
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///< This register allows the user to assign tape support to a
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///< particular drive during initialization.
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MAIN_STATUS_REGISTER = 0x3F4,
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///< The Main Status Register is a read-only register and is used
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///< for controlling command input and result output for all commands.
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DATARATE_SELECT_REGISTER = 0x3F4,
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///< This register is included for compatibility with the 82072
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///< floppy controller and is write-only.
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DATA_FIFO = 0x3F5,
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///< All command parameter information and disk data transfers go
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///< through the FIFO.
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DIGITAL_INPUT_REGISTER = 0x3F7,
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///< This register is read only in all modes.
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CONFIGURATION_CONTROL_REGISTER = 0x3F7
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///< This register sets the datarate and is write only.
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} fdc_registers_t;
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/// @brief Allows to enable the motor.
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/// @details The motor enable pins are directly controlled via the DOR and
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/// are a function of the mapping based on BOOTSEL bits in the TDR.
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void fdc_enable_motor(void);
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/// @brief Allows to disable the motor.
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void fdc_disable_motor(void);
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