| Desktop FDD | Standart Shugart-26 Notebook FDD | Disassembled external FDD | LPT pins on notebook |
| Molex+5 | 1 VCC+5 | 1 VCC+5 | 23 |
| 8 /INDEX | 2 /INDEX | 2 /INDEX | 2 |
| Molex+5 | 3 VCC+5 | 3 UNUSED | NC |
| 12 !selb | 4 /DRVS | 4 /DRVS | 10 |
| Molex+5 | 5 VCC+5 | 5 VCC+5 | 24 |
| 34 !dchng | 6 !dchng | 6 !dchng | 6 |
| N/A | 7 reserved | 7 reserved | NC |
| Not supported | 8 !rdy | 8 supported, but not used | NC |
| Not supported | 9 !media | 9 supported, but not used | NC |
| 16 !motb | 10 /MOTE | 10 /MOTE | 11 |
| 2 !denssel | 11 !denssel | 11 UNUSED | NC |
| 18 !dir | 12 !dir | 12 !dir | 16 |
| N/A | 13 unknown | 13 not importaint | 20 |
| 20 !step | 14 !step | 14 !step | 17 |
| Warning! -> | 15 GND | 15 VCC+5 (!!!) | 19 |
| 22 !wrda | 16 !wrda | 16 !wrda | 12 |
| 1..33 | 17 GND | 17 GND | 18 |
| 24 !wren | 18 !wren | 18 !wren | 13 |
| 1..33 | 19 GND | UNUSED | NC |
| 26 !trk0 | 20 !trk0 | 20 !trk0 | 3 |
| 1..33 | 21 GND | 21 GND | 25 |
| 28 !wp | 22 !wp | 22 !wp | 4 |
| 1..33 | 23 GND | UNUSED | NC |
| 30 !data read | 24 !data read | 24 !data read | 5 |
| 1..33 | 25 GND | 25 GND | 21 |
| 32 !side1 | 26 !side1 | 26 !side1 | 15 |
Notes.
1) Notebook detects an external FDD (and swithes LPT mode) by pulling some VCC or GND pins together.
2) Most desktop FDDs requires no +12, but eats bigger current so it's better to take VCC+5 from more powerful HDD/CD power cable.
3) See note about Pin 11 in Standart Shugart-26 Notebook FDD description.
4) Without pin 13, the entire system works well.
So, a common desktop FDD can be used for Extensa 600/600CD pretty well.
