PCI Bus Connector Layout (124-Pin)
PCI Local Bus Specifications - Revision 2.0
The PCI bus runs synchronous to the system microprocessor. For the Type 1 system board
the PCI bus is driven at 33MHz, for Type 2 system board it is driven at 30MHz. Each PCI connector I/O signal
is capable of driving one low-power Schottky load.
The PCI bus shares interrupts with the EISA bus. IRQ 5, 11 or 15 can be assigned to the PCI bus through the
Setup Utility. Precautions must be taken to ensure that the IRQs are assigned to the correct bus, otherwise, adapters might
not work correctly.
124-pin PCI-Connector
NOTE: 3.52Vdc is supplied through an opt. 5Vdc to 3.52 Vdc regulator.
Pin
Signal
Pin
Signal
A1
-TRST
B1
-12 V
A2
+12 V
B2
TCK
A3
TMS
B3
Ground
A4
TDI
B4
TDO
A5
+5 V
B5
+5 V
A6
-INTA
B6
+5 V
A7
-INTC
B7
-INTB
A8
+5 V
B8
-INTD
A9
Reserved
B9
-PRSNT1
A10
+5 V (I/O)
B10
Reserved
A11
Reserved
B11
-PRSNT2
A12
Ground
B12
Ground
A13
Ground
B13
Ground
A14
Reserved
B14
Reserved
A15
-RST
B15
Ground
A16
+5 V (I/O)
B16
CLK
A17
-GNT
B17
Ground
A18
Ground
B18
-REQ
A19
Reserved
B19
+5 V (I/O)
A20
AD(30)
B20
AD(31)
A21
+3.52 Vdc
B21
AD(29)
A22
AD(28)
B22
Ground
A23
AD(26)
B23
AD(27)
A24
Ground
B24
AD(25)
A25
AD(24)
B25
+3.52 Vdc
A26
IDSEL
B26
-C/BE(3)
A27
+3.52 Vdc
B27
AD(23)
A28
AD(22)
B28
Ground
A29
AD(20)
B29
AD(21)
A30
Ground
B30
AD(19)
A31
AD(18)
B31
+3.52 Vdc
A32
AD(16)
B32
AD(17)
A33
+3.52 Vdc
B33
-C/BE(2)
A34
-FRAME
B34
Ground
A35
Ground
B35
-IRDY
A36
-TRDY
B36
+3.52 Vdc
A37
Ground
B37
-DEVSEL
A38
-STOP
B38
Ground
A39
+3.52 Vdc
B39
-LOCK
A40
SDONE
B40
-PERR
A41
-SBO
B41
+3.52 Vdc
A42
Ground
B42
-SERR
A43
PAR
B43
+3.52 Vdc
A44
AD(15)
B44
-C/BE(1)
A45
+3.52 Vdc
B45
AD(14)
A46
AD(13)
B46
Ground
A47
AD(11)
B47
AD(12)
A48
Ground
B48
AD(10)
A49
AD(09)
B49
Ground
A50
Key
B50
Key
A51
Key
B51
Key
A52
C/BE(0)
B52
AD(08)
A53
+3.52 Vdc
B53
AD(07)
A54
AD(06)
B54
+3.52 Vdc
A55
AD(04)
B55
AD(05)
A56
Ground
B56
AD(03)
A57
AD(02)
B57
Ground
A58
AD(00)
B58
AD(01)
A59
+5 V (I/O)
B59
+5 V (I/O)
A60
-REQ64
B60
-ACK64
A61
+5 V
B61
+5 V
A62
+5 V
B62
+5 V
Please see the LEGAL - Trademark notice.
Feel free - send a for any BUG on this page found - Thank you.