IDE/ATA Command Set Summary
                ===========================
    
    +-----+--------------------------------------------+
    | &00 | NOP                                        |
    | &01 |                                            |
    | &02 |                                            |
    | &03 | CFA Request Extended Error Code            |
    | &04 |                                            |
    | &05 |                                            |
    | &06 |                                            |
    | &07 |                                            |
    | &08 | Device Reset                               |
    | &09 |                                            |
    | &0A |                                            |
    | &0B |                                            |
    | &0C |                                            |
    | &0D |                                            |
    | &0E |                                            |
    | &0F |                                            |
    +-----+--------------------------------------------+
    | &10 | {Recalibrate}                              |
    | &11 | {Recalibrate}                              |
    | &12 | {Recalibrate}                              |
    | &13 | {Recalibrate}                              |
    | &14 | {Recalibrate}                              |
    | &15 | {Recalibrate}                              |
    | &16 | {Recalibrate}                              |
    | &17 | {Recalibrate}                              |
    | &18 | {Recalibrate}                              |
    | &19 | {Recalibrate}                              |
    | &1A | {Recalibrate}                              |
    | &1B | {Recalibrate}                              |
    | &1C | {Recalibrate}                              |
    | &1D | {Recalibrate}                              |
    | &1E | {Recalibrate}                              |
    | &1F | {Recalibrate}                              |
    +-----+--------------------------------------------+
    | &20 | Read Sectors                               |
    | &21 | {Read Sectors}                             |
    | &22 | {Read Sectors}                             |
    | &23 | {Read Sectors}                             |
    | &24 | {Read Sectors}                             |
    | &25 | {Read Sectors}                             |
    | &26 | {Read Sectors}                             |
    | &27 | {Read Sectors}                             |
    | &28 |                                            |
    | &29 |                                            |
    | &2A |                                            |
    | &2B |                                            |
    | &2C |                                            |
    | &2D |                                            |
    | &2E |                                            |
    | &2F |                                            |
    +-----+--------------------------------------------+
    | &30 | Write Sectors                              |
    | &31 | {Write Sectors}                            |
    | &32 | {Write Sectors}                            |
    | &33 | {Write Sectors}                            |
    | &34 | {Write Sectors}                            |
    | &35 | {Write Sectors}                            |
    | &36 | {Write Sectors}                            |
    | &37 | {Write Sectors}                            |
    | &38 | CFA Write Sectors Without Erase            |
    | &39 | [CFA Write Sectors Without Erase?]         |
    | &3A | [CFA Write Sectors Without Erase?]         |
    | &3B | [CFA Write Sectors Without Erase?]         |
    | &3C | [CFA Write Sectors Without Erase?]         |
    | &3D | [CFA Write Sectors Without Erase?]         |
    | &3E | [CFA Write Sectors Without Erase?]         |
    | &3F | [CFA Write Sectors Without Erase?]         |
    +-----+--------------------------------------------+
    | &40 | Read Verify Sectors                        |
    | &41 | [Read Verify Sectors?]                     |
    | &42 | [Read Verify Sectors?]                     |
    | &43 | [Read Verify Sectors?]                     |
    | &44 | [Read Verify Sectors?]                     |
    | &45 | [Read Verify Sectors?]                     |
    | &46 | [Read Verify Sectors?]                     |
    | &47 | [Read Verify Sectors?]                     |
    | &48 |                                            |
    | &49 |                                            |
    | &4A |                                            |
    | &4B |                                            |
    | &4C |                                            |
    | &4D |                                            |
    | &4E |                                            |
    | &4F |                                            |
    +-----+--------------------------------------------+
    | &50 | {Write Format}                             |
    | &51 |                                            |
    | &52 |                                            |
    | &53 |                                            |
    | &54 |                                            |
    | &55 |                                            |
    | &56 |                                            |
    | &57 |                                            |
    | &58 |                                            |
    | &59 |                                            |
    | &5A |                                            |
    | &5B |                                            |
    | &5C |                                            |
    | &5D |                                            |
    | &5E |                                            |
    | &5F |                                            |
    +-----+--------------------------------------------+
    | &60 |                                            |
    | &61 |                                            |
    | &62 |                                            |
    | &63 |                                            |
    | &64 |                                            |
    | &65 |                                            |
    | &66 |                                            |
    | &67 |                                            |
    | &68 |                                            |
    | &69 |                                            |
    | &6A |                                            |
    | &6B |                                            |
    | &6C |                                            |
    | &6D |                                            |
    | &6E |                                            |
    | &6F |                                            |
    +-----+--------------------------------------------+
    | &70 | Seek                                       |
    | &71 | {Seek}                                     |
    | &72 | {Seek}                                     |
    | &73 | {Seek}                                     |
    | &74 | {Seek}                                     |
    | &75 | {Seek}                                     |
    | &76 | {Seek}                                     |
    | &77 | {Seek}                                     |
    | &78 | {Seek}                                     |
    | &79 | {Seek}                                     |
    | &7A | {Seek}                                     |
    | &7B | {Seek}                                     |
    | &7C | {Seek}                                     |
    | &7D | {Seek}                                     |
    | &7E | {Seek}                                     |
    | &7F | {Seek}                                     |
    +-----+--------------------------------------------+
    | &80 |                                            |
    | &81 |                                            |
    | &82 |                                            |
    | &83 |                                            |
    | &84 |                                            |
    | &85 |                                            |
    | &86 |                                            |
    | &87 | CFA Translate Sector                       |
    | &88 |                                            |
    | &89 |                                            |
    | &8A |                                            |
    | &8B |                                            |
    | &8C |                                            |
    | &8D |                                            |
    | &8E |                                            |
    | &8F |                                            |
    +-----+--------------------------------------------+
    | &90 | Execute Device Diagnostic                  |
    | &91 | Set Geometry                               |
    | &92 | Download Microcode                         |
    | &93 |                                            |
    | &94 |                                            |
    | &95 |                                            |
    | &96 |                                            |
    | &97 |                                            |
    | &98 |                                            |
    | &9A |                                            |
    | &9B |                                            |
    | &9C |                                            |
    | &9D |                                            |
    | &9E |                                            |
    | &9F |                                            |
    +-----+--------------------------------------------+
    | &A0 | Packet                                     |
    | &A1 | Identify Packet Device                     |
    | &A2 | Service                                    |
    | &A3 |                                            |
    | &A4 |                                            |
    | &A5 |                                            |
    | &A6 |                                            |
    | &A7 |                                            |
    | &A8 |                                            |
    | &A9 |                                            |
    | &AA |                                            |
    | &AB |                                            |
    | &AC |                                            |
    | &AD |                                            |
    | &AE |                                            |
    | &AF |                                            |
    +-----+--------------------------------------------+
    | &B0 | Smart                                      |
    | &B1 |                                            |
    | &B2 |                                            |
    | &B3 |                                            |
    | &B4 |                                            |
    | &B5 |                                            |
    | &B6 |                                            |
    | &B7 |                                            |
    | &B8 |                                            |
    | &B9 |                                            |
    | &BA |                                            |
    | &BB |                                            |
    | &BC |                                            |
    | &BD |                                            |
    | &BE |                                            |
    | &BF |                                            |
    +-----+--------------------------------------------+
    | &C0 | CFA Erase Sectors                          |
    | &C1 |                                            |
    | &C2 |                                            |
    | &C3 |                                            |
    | &C4 | Read Multiple                              |
    | &C5 | Write Multiple                             |
    | &C6 | Set Multiple Mode                          |
    | &C7 | Read DMA Queued                            |
    | &C8 | Read DMA                                   |
    | &C9 |                                            |
    | &CA | Write DMA                                  |
    | &CB |                                            |
    | &CC | Write DMA Queued                           |
    | &CD | CFA Write Multiple Withour erase           |
    | &CE |                                            |
    | &CF |                                            |
    +-----+--------------------------------------------+
    | &D0 |                                            |
    | &D1 |                                            |
    | &D2 |                                            |
    | &D3 |                                            |
    | &D4 |                                            |
    | &D5 |                                            |
    | &D6 |                                            |
    | &D7 |                                            |
    | &D8 |                                            |
    | &D9 |                                            |
    | &DA | Get Media Status                           |
    | &DB |                                            |
    | &DC |                                            |
    | &DD |                                            |
    | &DE | Media Lock                                 |
    | &DF | Media Unlock                               |
    +-----+--------------------------------------------+
    | &E0 | Standby Immediate                          |
    | &E1 | Idle Immediate                             |
    | &E2 | Standby                                    |
    | &E3 | Idle                                       |
    | &E4 | Read Buffer                                |
    | &E5 | Check Power Mode                           |
    | &E6 | Sleep                                      |
    | &E7 | Flush Cache                                |
    | &E8 | Write Buffer                               |
    | &E9 |                                            |
    | &EA |                                            |
    | &EB |                                            |
    | &EC | Identify Device                            |
    | &ED | Media Eject                                |
    | &EE |                                            |
    | &EF | Set Features                               |
    +-----+--------------------------------------------+
    | &F0 |                                            |
    | &F1 | Security Set Password                      |
    | &F2 | Security Unlock                            |
    | &F3 | Security Erase Prepare                     |
    | &F4 | Securoty Erase Unit                        |
    | &F5 | Security Freeze Lock                       |
    | &F6 | Security Disable Password                  |
    | &F7 |                                            |
    | &F8 | Read Native Max Address                    |
    | &F9 | Set Max                                    |
    | &FA |                                            |
    | &FB |                                            |
    | &FC |                                            |
    | &FD |                                            |
    | &FE |                                            |
    | &FF |                                            |
    +-----+--------------------------------------------+

Notes:
{} indicates commands mentioned in early ATA/IDE documents
but not in the T13 reference. [] indicated probable command
reflections.

                IDE/ATA Status and Errors
                =========================
  Error
  &80  Bad block
  &40  Uncorrectable data error
  &20  Media changed
  &10  Sector not found/ID mark not found
  &08  Media Change Requested
  &04  Abort
  &02  Track 0 not found/No media present
  &01  Address mark not found

  Status
  &80  Busy
  &40  Drive Ready
  &20  Drive Write Fault
  &10  Drive Seek Complete
  &08  Data Request
  &04  Error Corrected
  &02  Index pulse
  &01  Error in reg 1
  &00  Ok