This is the documentation about the IDE registers of the SYMBiFACE II expansion card.
| Port | Read | Write |
| #FD06 | Alternate Status | Digital Output |
| #FD07 | Drive Address | (Not Used) |
| #FD08 | Data Register | Data Register |
| #FD09 | Error Register | Features Register/(Write Precomp Reg.) |
| #FD0A | Sector Count | Sector Count |
| #FD0B | Sector Number | Sector Number |
| #FD0C | Cylinder Low | Cylinder Low |
| #FD0D | Cylinder High | Cylinder High |
| #FD0E | Device/Head Register | Device/Head Register |
| #FD0F | Status Register | Command Register |