Storage devices

NEC 1.2MB floppy drive

FD1157C  1.2 MB
These drives are compatibel with standard Floppy interface.
Configuration 1: Non-twisted cable

USE MON VC HDE DEN M1 DCG LM1 LM2 DX
2 1 On 1 1 On 2 0 0 see note

note: Drive 1 (A:) has DX=0, drive 2 (B:) has DX=1

Configuration 2: Twisted cable (pin 10-16 twisted), Drive 2 and controller are on one the same side of the twist, and drive 1 is on the other side.

USE MON VC HDE DEN M1 DCG LM1 LM2 DX
2 3 On 1 1 On 2 0 0 1

note: Both drive 1 (A:) and drive 2 (B:) has DX=1