22
PW1 :
ATX mode +3.3/5/12V power supply
10
connector.
20
COM1/COM2 :
these two connectors are
used to connect serial port cables.
Slot 1
pin
Signal name
1 NDCDA/B
2 NSINA/B
3
NSOUTA/B
4 NDTRA/B
5
GND
6 NDSRA/B
7 NRTSA/B
8 NCTSA/B
9 NRIA/B
Slot 1
A is COM1, B is COM2
FDC1 :
this connector is used to connect the floppy
drive through a cable.
pin
signal
pin
signal
2 RWC-
20
STEP-
4 Reserved
22
Write
Data
6 FDEDIN
24
Write
Gate
8 Index-
26
Track
00-
10 Motor EnableA- 28 Write Protect-
12 Drive Sele.B-
30 Read Data-
14 Drive Sele.A-
32 Side 1 Sele.-
16 Motor
EnableB- 34 DisketteChange
18 DIR-
All of odd pins are ground
1
6 2
7 3
8 4
9 5
34 33
2
1
1 3.3V
6 +5V
11 3.3V 16
GND
2 3.3V
7 GND
12 -12V 17
GND
3 GND 8 PWRGD 13 GND 18
-5V
4 +5V
9 5VSB 14*
PS_ON
19
+5V
5 GND 10 +12V
15 GND 20
+5V
* PS_ON : Soft-Off power control
