Changes
|'''#FD09''' || Error Register || Features Register/''(Write Precomp Reg.)''
|-
|'''#FD0A''' || Sector Count (0=256) || Sector Count(0=256)
|-
|'''#FD0B''' || Sector Number (for CHS or LBA bits 0-7) || Sector Number (for CHS or LBA bits 0-7)
|-
|'''#FD0C''' || Cylinder Low (for CHS or LBA bits 8-15) || Cylinder Low (for CHS or LBA bits 8-15)
|-
|'''#FD0D''' || Cylinder High (for CHS or LBA bits 16-23) || Cylinder High (for CHS or LBA bits 16-23)
|-
|'''#FD0E''' || Device/Head Register (Bit 6=0 CHS, Bit 6=0 LBA) (Bit 4 = 0 Master, Bit 4 = 1 Slave) (Bits 3..0 Head for CHS or LBA bits 24-27) || (Bit 6=0 CHS, Bit 6=0 LBA) (Bit 4 = 0 Master, Bit 4 = 1 Slave) Device/Head Register (Bits 3..0 Head for CHS or LBA bits 24-27)
|-
|'''#FD0F''' || Status Register || Command Register
