|'''#FD06''' ||IDE Alternate Status ||IDE Digital Output
|-
|'''#FD07''' ||IDE Drive Address ||Write: Not UsedN/A
|-
|'''#FD08''' ||IDE Data Register ||IDE Data Register
|'''#FD0F''' ||IDE Status Register ||IDE Command Register
|-
|'''#FD10''' ||PS/2 Mouse Status||Write: Not usedN/A
|-
|'''#FD11''' ||ROM Enable SYMBiFACE II romsRoms||ROM Disable all SYMBiFACE II Roms
|-
|'''#FD12-#FD13''' ||? ||?
|'''#FD14''' ||RTC Data ||RTC Data
|-
|'''#FD15''' ||Read: Not used N/A ||RTC Index
|-
|'''#FD16''' ||? ||?
|-
|'''#FD17''' ||ROM Map upper ROM to 4000h-7FFFh <br> (for writing to FLASH ROMs)||ROM Don't map ROM to 4000h-7FFFh (default)
|-
|'''#FD17-#FD3F''' ||? ||?
|}