SYMBiFACE II:IDE registers
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The Symbiface 2 operates the IDE device in 16-bit data transfer mode. 16-bits of data is buffered at a time within the Symbiface 2 and read via the Data port below 8 bits at a time.
The I/O ports operate in a "pass-through" like mode where the registers directly reflect those of the connected ATA device.
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 |
