=== FDC I/O Ports ===
All types of floppy disk controllers for the F1-S/F1-D/M1-S/M1-D range are based on the NEC 765 chip. The manual states that "controllers having an integrated ROM module/eprommer" (the later 6128 interfaces?), the port addresses can be freely configured using a decoder ROM.
'''CPC 464:'''
! Address !! Description
|-
| 0xFB7E || uPD control (R)
|-
| 0xFB7F || uPD data (R/W)
|-
| 0xFA7E || motor on/off
! Address !! Description
|-
| 0xFBF6 || uPD control (R)
|-
| 0xFBF7 || uPD data (R/W)
|-
| 0xFA7E || motor on/off