Changes
/* FDC Command Table (15 commands) */
| command byte 0 || colspan="3" style="text-align: center;" | x || 0 || 1 || 1 || 1 || 1
|-
| command byte 1 || colspan="65" style="text-align: center;" | x || HD|| colspan="2" style="text-align: center;" | US
|-
| command byte 2 || colspan="8" | NCN: new cylinder number
