Definitions for ATA controllers
Marcel Sondaar
| atadef.bi | Definitions for ATA controllers |
| Constants | |
| ATA_ISABASE_1 | The base register offset for the primary IDE bus on legacy systems |
| ATA_ISABASE_2 | The base register offset for the secondary IDE bus on legacy systems |
| ATA_ALTERNATESTATUS_BASE | The offset of the alternate status register relative to the IO Base on legacy systems For instance ATA_ISABASE_1 + ATA_ALTERNATESTATUS_BASE = &H3F6 |
| ATAREGS | Lists the registers available in the first IO range |
| Constants | |
| ATA_RW_DATA | The offset to the data port Data is sent to/from the drive through this port when in PIO mode, and DRQ is set in ATA_R_STATUS The port is 16 bits wide and should normally be accessed with REP INSW/OUTS |
| ATA_RW_DEVSEL | Contains drive selection as well as some operation features |
| ATA_W_COMMAND | The offset to the command port. |
| ATA_R_STATUS | Contains the status of the drive currently selected in ATA_RW_DEVSEL it holds a bitfield of status flags from ATASTATUS |
| ATASTATUS | Holds the bitfields present in the <ATA_R_STATUS> register |
| Constants | |
| ATA_STATUS_ERR | The device has aborted the previous command |
| ATA_STATUS_DRQ | The device is waiting for the host to perform data transfer |
| ATA_STATUS_DF | The device does not operate as expected. |
| ATA_STATUS_DRDY | The device is ready to accept commands |
| ATA_STATUS_BUSY | The device is busy executing a command. |
| ATACOMMANDS | Lists the possible commands a drive can understand |
| ATAIDENTIFY | The structure of the data as returned by an IDENTIFY command |
The offset of the alternate status register relative to the IO Base on legacy systems For instance ATA_ISABASE_1 + ATA_ALTERNATESTATUS_BASE = &H3F6
Lists the registers available in the first IO range
| Constants | |
| ATA_RW_DATA | The offset to the data port Data is sent to/from the drive through this port when in PIO mode, and DRQ is set in ATA_R_STATUS The port is 16 bits wide and should normally be accessed with REP INSW/OUTS |
| ATA_RW_DEVSEL | Contains drive selection as well as some operation features |
| ATA_W_COMMAND | The offset to the command port. |
| ATA_R_STATUS | Contains the status of the drive currently selected in ATA_RW_DEVSEL it holds a bitfield of status flags from ATASTATUS |
The offset to the data port Data is sent to/from the drive through this port when in PIO mode, and DRQ is set in ATA_R_STATUS The port is 16 bits wide and should normally be accessed with REP INSW/OUTS
16 bits
The offset to the command port. When a device has DRDY set in ATA_R_STATUS, a command can be sent by writing this port
8 bits
Contains the status of the drive currently selected in ATA_RW_DEVSEL it holds a bitfield of status flags from ATASTATUS
8 bits
Holds the bitfields present in the <ATA_R_STATUS> register
| Constants | |
| ATA_STATUS_ERR | The device has aborted the previous command |
| ATA_STATUS_DRQ | The device is waiting for the host to perform data transfer |
| ATA_STATUS_DF | The device does not operate as expected. |
| ATA_STATUS_DRDY | The device is ready to accept commands |
| ATA_STATUS_BUSY | The device is busy executing a command. |