; ATA-2 commands ************************

ATA_EXECUTE_DEVICE_DIAGNOSTIC    equ 0x90
ATA_IDENTIFY_DEVICE              equ 0xec
ATA_INITIALIZE_DEVICE_PARAMETERS equ 0x91
ATA_READ_SECTORS                 equ 0x20
ATA_READ_VERIFY_SECTORS          equ 0x40
;  equ 0x70-0x7f
ATA_SEEK                         equ 0x70
ATA_WRITE_SECTORS                equ 0x30


; ****** additional commands ************

ATA_ACKNOWLEDGE_MEDIA_CHANGE   equ 0xdb
ATA_POST_BOOT                  equ 0xdc
ATA_PRE_BOOR                   equ 0xdd
ATA_CHECK_POWER_MODE           equ 0x98
ATA_CHECK_POWER_MODE2          equ 0xe5
ATA_DOOR_LOCK                  equ 0xde
ATA_DOOR_UNLOCK                equ 0xdf
ATA_DOWNLOAD_MICROCODE         equ 0x92
ATA_IDLE                       equ 0x97
ATA_IDLE2                      equ 0xe3
ATA_IDLE_IMMENDIATE            equ 0x95
ATA_IDLE_IMMENDIATE2           equ 0xe1
ATA_MEDIA_EJECT                equ 0xed
ATA_NOP                        equ 0x00
ATA_READ_BUFFER                equ 0xe4
ATA_READ_DMA                   equ 0xc8
ATA_READ_LONG                  equ 0x22
ATA_READ_MULTIPLE              equ 0xc4
;  equ 0x10-0x1f
ATA_RECALIBRATE                equ 0x10
ATA_SET_FEATURES               equ 0xef
ATA_SET_MULTIPLE_MODE          equ 0xc6
ATA_SLEEP                      equ 0x99
ATA_SLEEP2                     equ 0xe6
ATA_STANDBY                    equ 0x96
ATA_STANDBY2                   equ 0xe2
ATA_STANDBY_IMMENDIATE         equ 0x94
ATA_STANDBY2_IMMENDIATE        equ 0xe0
ATA_WRITE_BUFFER               equ 0xe8
ATA_WRITE_DMA                  equ 0xca
ATA_WRITE_LONG                 equ 0x32
ATA_WRITE_MULTIPLE             equ 0xc5
ATA_WRITE_SAME                 equ 0xe9
ATA_WRITE_VERIFY               equ 0x3c


; **** device specific commands *************

; TODO remap command
ATA_FORMAT_TRACK          equ 0x50


; command modificators
; for ATA_READ_SECTORS, ATA_WRITE_SECTORS, ATA_VERIFY_SECTORS,
;     ATA_READ_DMA, ATA_WRITE_DMA, ATA_READ_LONG, ATA_WRITE_LONG
ATA_WITHOUT_RETRY         equ 0x01




; ATA registers *****************************

; command registers

ATA_DATA_REG         equ 0
ATA_ERROR_REG        equ 1
ATA_FEATURES_REG     equ 1
ATA_SECTOR_COUNT     equ 2
ATA_SECTOR_NUMBER    equ 3
ATA_CYLINDER_LOW     equ 4
ATA_CYLINDER_HIGH    equ 5
ATA_DEVICE_HEAD      equ 6
ATA_STATUS           equ 7
ATA_COMMAND          equ 7


; control registers
ATA_ALTERNATE_STATUS equ 0x16
ATA_DEVICE_CONTROL   equ 0x16
ATA_DRIVE_ADDRESS    equ 0x17


; status register bits
ATA_BUSY           equ 0x80
ATA_READY          equ 0x40
ATA_FAULT          equ 0x20
ATA_SEEK_COMPLETE  equ 0x10
ATA_DATA_REQUEST   equ 0x08
ATA_CORRECTED_DATA equ 0x04
ATA_INDEX          equ 0x02
ATA_ERROR          equ 0x01


; device/head register bits
ATA_LBA            equ 0x40
ATA_DEVICE         equ 0x10


; device control register bits
ATA_SOFT_RESET        equ 0x04
ATA_INTERRUPT_DISABLE equ 0x02


; error register bits
ATA_UNCORRECTABLE          equ 0x40
ATA_MEDIA_CHANGED          equ 0x20
ATA_ID_NOT_FOUND           equ 0x10
ATA_ABORTED                equ 0x08
ATA_MEDIA_CHANGE_REQUESTED equ 0x04
ATA_TRACK_0_NOT_FOUND      equ 0x02
ATA_ADDERSS_MARK_NOT_FOUND equ 0x01
;