Crypticalcode0
Experienced Member
I am just wondering which is the most prevailing interface for a FDD?
I am doing this from memory so don't gun me down for a typo.
Uneven numbered pins all are ground this is what is common on most standards.(yay signal grounds)
And all signals are inverted to Negative logic.
Modern Variable pinout
2 Reduced Write, Density Select
4, 6 N/C
8 IDX
10 MOTEA
12 DRVA, DRVB
14 DRVB, DRVA
16 MOTEB
18 DIR
20 STEP
22 WDATA, Write Data
24 WGATE, Write Enable
26 TRK0, Track 0
28 Write Protection
30 RDATA, Read Data
32 HSEL, SSEL, Header Select, Side Select
34 DSKCHG, Disk Change
Shugart
2 DCD, Disk Change Detect
3 Key
4 DS3, Device Select 3
6 INUSE,
8 Index
10 DS0, Device Select 0
12 DS1, Device Select 1
14 DS2, Device Select 2
16 MTRON, Motor on
18 DIR, Direction
20 STEP
22 WDATA, Write Data
24 WGATE, Write Enable
26 TRK0, Track 0
28 WPT, Write protect
30 RDATA, Read Data
32 SIDE1, Side/Header select
34 RDY, Drive Ready/disk Change
Edit: 5170 High capacity diskette drive
2 Reduced Write
4 Reserve
6 DS3
8 IDX
10 DS0
12 DS1
14 DS2
16 MTRON
18 DIR
20 STEP
22 WDATA
24 WGATE
26 TRK00
28 Write Protect
30 RDATA
32 Side 1 change
34 Diskette Change
Edit: Diskette Drive adepter 5.25
2,4,6, N/C
8 IDX Index
10 MOTEA, motor Enable A
12 DSB, Drive Select B
14 DSA Drive select A
16 MOTEB, motor enable B
18 DIR. direction stepper motor
20 STEP, step pulse
22 WDATA, write data
24 WE, write enable
26 TRK0, track 0
28 WP, write protection
30 RDATA, read data
32 Select Head 1
34 Unused
Which of these is more commonly found?
And is there another standard?
I am doing this from memory so don't gun me down for a typo.
Uneven numbered pins all are ground this is what is common on most standards.(yay signal grounds)
And all signals are inverted to Negative logic.
Modern Variable pinout
2 Reduced Write, Density Select
4, 6 N/C
8 IDX
10 MOTEA
12 DRVA, DRVB
14 DRVB, DRVA
16 MOTEB
18 DIR
20 STEP
22 WDATA, Write Data
24 WGATE, Write Enable
26 TRK0, Track 0
28 Write Protection
30 RDATA, Read Data
32 HSEL, SSEL, Header Select, Side Select
34 DSKCHG, Disk Change
Shugart
2 DCD, Disk Change Detect
3 Key
4 DS3, Device Select 3
6 INUSE,
8 Index
10 DS0, Device Select 0
12 DS1, Device Select 1
14 DS2, Device Select 2
16 MTRON, Motor on
18 DIR, Direction
20 STEP
22 WDATA, Write Data
24 WGATE, Write Enable
26 TRK0, Track 0
28 WPT, Write protect
30 RDATA, Read Data
32 SIDE1, Side/Header select
34 RDY, Drive Ready/disk Change
Edit: 5170 High capacity diskette drive
2 Reduced Write
4 Reserve
6 DS3
8 IDX
10 DS0
12 DS1
14 DS2
16 MTRON
18 DIR
20 STEP
22 WDATA
24 WGATE
26 TRK00
28 Write Protect
30 RDATA
32 Side 1 change
34 Diskette Change
Edit: Diskette Drive adepter 5.25
2,4,6, N/C
8 IDX Index
10 MOTEA, motor Enable A
12 DSB, Drive Select B
14 DSA Drive select A
16 MOTEB, motor enable B
18 DIR. direction stepper motor
20 STEP, step pulse
22 WDATA, write data
24 WE, write enable
26 TRK0, track 0
28 WP, write protection
30 RDATA, read data
32 Select Head 1
34 Unused
Which of these is more commonly found?
And is there another standard?
Last edited: