w All standard ISA bus signals
w All 32-bit PCI bus signals
w Standard voltage requirements of the ISA and PCI slots
w Adapter present bits for up to 3 PCI slots
w ID select pins for up to 3 PCI slots
w Reset pins for up to 3 PCI slots
w Bus request/grant pairs for up to 3 PCI slots
w Separate clock lines for 2 PCI slots.
| Buffered A/D 14
|
Connects to IDSEL SLOT 2 (upper)
|
| Buffered A/D 13
|
Connects to IDSEL SLOT 1 (lower)
|
3. PCI Slot 1 interrupts A, B, C, and D are wired together on the riser and connected at connector pin INTB.
4. Separate clock lines are wired to each PCI slot. Equal clock line lengths are maintained system-wide for all PCI clock lines including those on the riser. Riser clock length allocations are 3.7 inches and 2.8 inches for slot 2 and slot 1 respectively.
5. At each PCI slot, both of the PCI presence bits are wired in parallel on the riser, and a single signal line from each slot is connected to a pin on the riser connector which is connected to the I/O interface EPLD. This component generates the corresponding presence bit in the equipment register (PCI card power levels are not distinguished).
6. The JTAG signals, TDI and TDO, are wired daisy chain fashion, and TDI is connected to TDO on the motherboard. The motherboard itself does not support JTAG. The other JTAG signals are wired socket to socket and to the motherboard connector on the riser.
7. Four other unused pins are connected to both PCI sockets and to the motherboard connector - SDONE, SBO, REQ64, and ACK64; however, the 64-bit PCI is not supported; nor are PCI caches. These signals are not connected on the motherboard.
8. The following ISA signals are buffered on the riser with a '125 buffer:
w AEN
w TC
w BALE
w ISA_RESET
9. The following signals are buffered on the riser with a '243 bidirectional buffer (They are pointed towards the riser until ISA_MASTER# activates):
w IOW#
w IOR#
w SBHE#
w ISA_REFRESH#
w 3.3v " 5%
w 5 amps maximum available output (current may be shared between slots)
| Table 1. Connector Capacity
|
|||
| Voltage
|
Motherboard Connector
@ 1 amp/pin (1)
|
PCI Connector @ 1 amp/
pin
|
ISA Connector @ 3 amps/
pin
|
| +5v
|
33 amps
|
13 amps
|
9 amps
|
| -5v
|
1 amp
|
n/a
|
3 amps
|
| +12v
|
3 amps
|
1 amp
|
3 amps
|
| -12v
|
2 amps
|
1 amp
|
3 amps
|
| +3.3v
|
n/a
|
12 amps(2)
|
n/a
|
| Common
GND
|
36 amps(3)
|
22 amps
|
12 amps
|
| Note: These are connector capacities, and the amounts specified here may not be available from the motherboard. See Section for the allocation of current for this connector.
|
|||
| Table 2. Riser Connector Pin Assignments
|
|||
| Pin
|
Function
|
Pin
|
Function
|
| A1
|
ISA IO CHCK#
|
B1
|
GROUND
|
| A2
|
-5 VOLTS
|
B2
|
-12 VOLTS
|
| A3
|
SD(7)
|
B3
|
ISA RESET
|
| A4
|
SD(6)
|
B4
|
-12 VOLTS
|
| A5
|
SD(5)
|
B5
|
ISA IRQ9
|
| A6
|
SD(4)
|
B6
|
+12 VOLTS
|
| A7
|
SD(3)
|
B7
|
ISA DRQ(2)
|
| A8
|
SD(2)
|
B8
|
+12 VOLTS
|
| A9
|
SD(1)
|
B9
|
ISA ZERO WS#
|
| A10
|
SD(0)
|
B10
|
+12 VOLTS
|
| A11
|
GROUND
|
B11
|
+5 VOLTS
|
| A12
|
ISA IO CHRDY
|
B12
|
GROUND
|
| A13
|
ISA AEN
|
B13
|
ISA SMEMW#
|
| A14
|
ISA SA(19)
|
B14
|
ISA SMEMR#
|
| A15
|
ISA SA(18)
|
B15
|
ISA IOW#
|
| A16
|
ISA SA(17)
|
B16
|
ISA IOR#
|
| A17
|
ISA SA(16)
|
B17
|
ISA DACK(3)#
|
| A18
|
ISA SA(15)
|
B18
|
ISA DRQ(3)
|
| A19
|
ISA SA(14)
|
B19
|
ISA DACK(1)#
|
| A20
|
ISA SA(13)
|
B20
|
ISA DRQ(1)
|
| A21
|
ISA SA(12)
|
B21
|
ISA REFRESH#
|
| A22
|
GROUND
|
B22
|
GROUND
|
| A23
|
PCI TRST# (res)
|
B23
|
+5 VOLTS
|
| A24
|
+5 VOLTS
|
B24
|
ISA TCK (res)
|
| A25
|
PCI TMS (res)
|
B25
|
GROUND
|
| A26
|
PCI TDI (res)
|
B26
|
PCI TDO (res)
|
| A27
|
+5 VOLTS
|
B27
|
GROUND
|
| A28
|
PCI_IRQ9#
|
B28
|
+5 VOLTS
|
| A29
|
RESERVED
|
B29
|
PCI_IRQ11#
|
| A30
|
+5 VOLTS
|
B30
|
RESERVED
|
| A31
|
RESERVED
|
B31
|
PCI PRESENT 1#
|
| A32
|
+5 VOLTS
|
B32
|
GROUND
|
| A33
|
PCI_GNT0#(res)
|
B33
|
PCI PRESENT 2#
|
| A34
|
PCI_REQ0#(res)
|
B34
|
GROUND
|
| A35
|
+5 VOLTS
|
B35
|
CLOCK SLOT 1
|
| A36
|
PCI RESET 1#
|
B36
|
GROUND
|
| A37
|
+5 VOLTS
|
B37
|
CLOCK SLOT 2
|
| A38
|
PCI RESET 2#
|
B38
|
GROUND
|
| A39
|
PCI GNT 1#
|
B39
|
GROUND
|
| A40
|
GROUND
|
B40
|
PCI REQ 1#
|
| A41
|
PCI GNT 2#
|
B41
|
PCI REQ 2#
|
| A42
|
RESERVED
|
B42
|
+5 VOLTS
|
| A43
|
+5 VOLTS
|
B43
|
GROUND
|
| A44
|
PCI IDSEL 2
|
B44
|
RESERVED
|
| A45
|
GROUND
|
B45
|
+5 VOLTS
|
| A46
|
PCI A/D(30)
|
B46
|
PCI A/D(31)
|
| A47
|
+5 VOLTS
|
B47
|
PCI A/D(29)
|
| A48
|
PCI A/D(28)
|
B48
|
GROUND
|
| A49
|
PCI A/D(26)
|
B49
|
PCI A/D(27)
|
| A50
|
GROUND
|
B50
|
PCI A/D(25)
|
| A51
|
PCI A/D(24)
|
B51
|
+5 VOLTS
|
| A52
|
PCI IDSEL 1
|
B52
|
C/BE#(3)
|
| A53
|
+5 VOLTS
|
B53
|
PCI A/D(23)
|
| A54
|
PCI A/D(22)
|
B54
|
GROUND
|
| A55
|
PCI A/D(20)
|
B55
|
PCI A/D(21)
|
| A56
|
GROUND
|
B56
|
PCI A/D(19)
|
| A57
|
PCI A/D(18)
|
B57
|
+5 VOLTS
|
| A58
|
PCI A/D(16)
|
B58
|
PCI A/D(17)
|
| A59
|
+5 VOLTS
|
B59
|
C/BE#(2)
|
| A60
|
PCI FRAME#
|
B60
|
GROUND
|
| A61
|
GROUND
|
B61
|
PCI IRDY#
|
| A62
|
PCI TRDY#
|
B62
|
+5 VOLTS
|
| A63
|
GROUND
|
B63
|
PCI DEVSEL#
|
| A64
|
PCI STOP#
|
B64
|
GROUND
|
| A65
|
+5 VOLTS
|
B65
|
PCI LOCK#
|
| A66
|
PCI SDONE (res)
|
B66
|
PCI PERR#
|
| A67
|
PCI SBO# (res)
|
B67
|
+5 VOLTS
|
| A68
|
GROUND
|
B68
|
PCI SERR#
|
| A69
|
PCI PAR
|
B69
|
+5 VOLTS
|
| A70
|
PCI A/D(15)
|
B70
|
C/BE#(1)
|
| A71
|
+5 VOLTS
|
B71
|
PCI A/D(14)
|
| A72
|
PCI A/D(13)
|
B72
|
GROUND
|
| A73
|
PCI A/D(11)
|
B73
|
PCI A/D(12)
|
| A74
|
GROUND
|
B74
|
PCI A/D(10)
|
| A75
|
PCI A/D(9)
|
B75
|
GROUND
|
| A76
|
C/BE#(0)
|
B76
|
PCI A/D(8)
|
| A77
|
+5 VOLTS
|
B77
|
PCI A/D(7)
|
| A78
|
PCI A/D(6)
|
B78
|
+5 VOLTS
|
| A79
|
PCI A/D(4)
|
B79
|
PCI A/D(5)
|
| A80
|
GROUND
|
B80
|
PCI A/D(3)
|
| A81
|
PCI A/D(2)
|
B81
|
GROUND
|
| A82
|
PCI A/D(0)
|
B82
|
PCI A/D(1)
|
| A83
|
+5 VOLTS
|
B83
|
+5 VOLTS
|
| A84
|
PCI REQ64#
|
B84
|
PCI ACK64#
|
| A85
|
+5 VOLTS
|
B85
|
+5 VOLTS
|
| A86
|
+5 VOLTS
|
B86
|
+5 VOLTS
|
| A87
|
GROUND
|
B87
|
GROUND
|
| A88
|
ISA SA(11)
|
B88
|
GROUND
|
| A89
|
+5 VOLTS
|
B89
|
ISA SYSCLK
|
| A90
|
ISA SA(10)
|
B90
|
GROUND
|
| A91
|
ISA SA(9)
|
B91
|
ISA_IRQ7
|
| A92
|
ISA SA(8)
|
B92
|
ISA_IRQ6
|
| A93
|
ISA SA(7)
|
B93
|
ISA_IRQ5
|
| A94
|
ISA SA(6)
|
B94
|
ISA_IRQ4
|
| A95
|
ISA SA(5)
|
B95
|
ISA_IRQ3
|
| A96
|
ISA SA(4)
|
B96
|
ISA DACK(2)#
|
| A97
|
ISA SA(3)
|
B97
|
ISA TC
|
| A98
|
ISA SA(2)
|
B98
|
ISA BALE
|
| A99
|
ISA SA(1)
|
B99
|
RESERVED
|
| A100
|
ISA SA(0)
|
B100
|
GROUND
|
| A101
|
GROUND
|
B101
|
ISA OSCILLATOR
|
| A102
|
RESERVED
|
B102
|
+5 VOLTS
|
| A103
|
ISA SBHE#
|
B103
|
ISA MEMCS16#
|
| A104
|
LA(23)
|
B104
|
ISA IOCS16#
|
| A105
|
LA(22)
|
B105
|
ISA_IRQ10
|
| A106
|
LA(21)
|
B106
|
ISA_IRQ11
|
| A107
|
LA(20)
|
B107
|
ISA_IRQ12
|
| A108
|
LA(19)
|
B108
|
ISA_IRQ15
|
| A109
|
LA(18)
|
B109
|
ISA_IRQ14
|
| A110
|
LA(17)
|
B110
|
ISA DACK(0)#
|
| A111
|
ISA MEMR#
|
B111
|
ISA DRQ(0)
|
| A112
|
ISA MEMW#
|
B112
|
ISA DACK(5)#
|
| A113
|
SD(8)
|
B113
|
ISA DRQ(5)
|
| A114
|
SD(9)
|
B114
|
ISA DACK(6)#
|
| A115
|
SD(10)
|
B115
|
ISA DRQ(6)
|
| A116
|
SD(11)
|
B116
|
ISA DACK(7)#
|
| A117
|
SD(12)
|
B117
|
ISA DRQ(7)
|
| A118
|
SD(13)
|
B118
|
+5 VOLTS
|
| A119
|
SD(14)
|
B119
|
ISA MASTER#
|
| A120
|
SD(15)
|
B120
|
GROUND
|
| Table 3. PCI Connector Pin Assignments
|
|||
| Pin
|
Function
|
Pin
|
Function
|
| A1
|
TRST#
|
B1
|
-12 VOLTS#
|
| A2
|
+12 VOLTS
|
B2
|
TCK
|
| A3
|
TMS
|
B3
|
GROUND
|
| A4
|
TDI
|
B4
|
TDO
|
| A5
|
+5 VOLTS
|
B5
|
+5 VOLTS
|
| A6
|
INTA#
|
B6
|
+5 VOLTS
|
| A7
|
INTC#
|
B7
|
INTB#
|
| A8
|
+5 VOLTS
|
B8
|
INTD#
|
| A9
|
RESERVED
|
B9
|
PRESENT 1# *
|
| A10
|
+5 VOLTS
|
B10
|
RESERVED
|
| A11
|
RESERVED
|
B11
|
PRESENT 2# *
|
| A12
|
GROUND
|
B12
|
GROUND
|
| A13
|
GROUND
|
B13
|
GROUND
|
| A14
|
RESERVED
|
B14
|
RESERVED
|
| A15
|
RESET#
|
B15
|
GROUND
|
| A16
|
+5 VOLTS
|
B16
|
CLK
|
| A17
|
GNT#
|
B17
|
GROUND
|
| A18
|
GROUND
|
B18
|
REQ#
|
| A19
|
RESERVED
|
B19
|
+5 VOLTS
|
| A20
|
A/D(30)
|
B20
|
A/D(31)
|
| A21
|
+3.3V
|
B21
|
A/D(29)
|
| A22
|
A/D(28)
|
B22
|
GROUND
|
| A23
|
A/D(26)
|
B23
|
A/D(27)
|
| A24
|
GROUND
|
B24
|
A/D(25)
|
| A25
|
A/D(24)
|
B25
|
+3.3V
|
| A26
|
IDSEL
|
B26
|
C/BE#(3)
|
| A27
|
+3.3V
|
B27
|
A/D(23)
|
| A28
|
A/D(22)
|
B28
|
GROUND
|
| A29
|
A/D(20)
|
B29
|
A/D(21)
|
| A30
|
GROUND
|
B30
|
A/D(19)
|
| A31
|
A/D(18)
|
B31
|
+3.3V
|
| A32
|
A/D(16)
|
B32
|
A/D(17)
|
| A33
|
+3.3V
|
B33
|
C/BE#(2)
|
| A34
|
FRAME#
|
B34
|
GROUND
|
| A35
|
GROUND
|
B35
|
IRDY#
|
| A36
|
TRDY#
|
B36
|
+3.3V
|
| A37
|
GROUND
|
B37
|
DEVSEL#
|
| A38
|
STOP#
|
B38
|
GROUND
|
| A39
|
+3.3V
|
B39
|
LOCK#
|
| A40
|
SDONE
|
B40
|
PERR#
|
| A41
|
SBO#
|
B41
|
+3.3V
|
| A42
|
GROUND
|
B42
|
SERR#
|
| A43
|
PAR
|
B43
|
+3.3V
|
| A44
|
A/D(15)
|
B44
|
C/BE#(1)
|
| A45
|
+3.3V
|
B45
|
A/D(14)
|
| A46
|
A/D(13)
|
B46
|
GROUND
|
| A47
|
A/D(11)
|
B47
|
A/D(12)
|
| A48
|
GROUND
|
B48
|
A/D(10)
|
| A49
|
A/D(9)
|
B49
|
GROUND
|
| A50
|
<Key>
|
B50
|
<Key>
|
| A51
|
<Key>
|
B51
|
<Key>
|
| A52
|
C/BE#(0)
|
B52
|
A/D(8)
|
| A53
|
+3.3V
|
B53
|
A/D(7)
|
| A54
|
A/D(6)
|
B54
|
+3.3V
|
| A55
|
A/D(4)
|
B55
|
A/D(5)
|
| A56
|
GROUND
|
B56
|
A/D(3)
|
| A57
|
A/D(2)
|
B57
|
GROUND
|
| A58
|
A/D(0)
|
B58
|
A/D(1)
|
| A59
|
+5 VOLTS
|
B59
|
+5 VOLTS
|
| A60
|
REQ64#
|
B60
|
ACK64#
|
| A61
|
+5 VOLTS
|
B61
|
+5 VOLTS
|
| A62
|
+5 VOLTS
|
B62
|
+5 VOLTS
|
| Notes: * The two card type bits, B9 and B11, are connected on the riser. ** Int A-D, A6, A7, B7,and B8 are connected together on the riser.
|
|||
| Table 4. 3.3v, 6-Pin Connector Pin Assignments
|
|||
| Pin
|
Function
|
Pin
|
Function
|
| 1-3
|
3.3 Volts
|
4-6
|
GROUND
|
| Table 5. ISA Connector Pin Assignments
|
|||
| Pin
|
Function
|
Pin
|
Function
|
| A1
|
IO CHCK#
|
B1
|
GROUND
|
| A2
|
SD(7)
|
B2
|
RESET_DRV
|
| A3
|
SD(6)
|
B3
|
+5 VOLTS
|
| A4
|
SD(5)
|
B4
|
IRQ9
|
| A5
|
SD(4)
|
B5
|
-5 VOLTS
|
| A6
|
SD(3)
|
B6
|
DRQ2
|
| A7
|
SD(2)
|
B7
|
-12 VOLTS
|
| A8
|
SD(1)
|
B8
|
ZERO WS#
|
| A9
|
SD(0)
|
B9
|
+12 VOLTS
|
| A10
|
IO CHRDY
|
B10
|
GROUND
|
| A11
|
AEN
|
B11
|
SMEMW#
|
| A12
|
SA(19)
|
B12
|
SMEMR#
|
| A13
|
SA(18)
|
B13
|
IOW#
|
| A14
|
SA(17)
|
B14
|
IOR#
|
| A15
|
SA(16)
|
B15
|
DACK3#
|
| A16
|
SA(15)
|
B16
|
DRQ3
|
| A17
|
SA(14)
|
B17
|
DACK1#
|
| A18
|
SA(13)
|
B18
|
DRQ1
|
| A19
|
SA(12)
|
B19
|
REFRESH
|
| A20
|
SA(11)
|
B20
|
CLK
|
| A21
|
SA(10)
|
B21
|
IRQ7
|
| A22
|
SA(9)
|
B22
|
IRQ6
|
| A23
|
SA(8)
|
B23
|
IRQ5
|
| A24
|
SA(7)
|
B24
|
IRQ4
|
| A25
|
SA(6)
|
B25
|
IRQ3
|
| A26
|
SA(5)
|
B26
|
DACK2#
|
| A27
|
SA(4)
|
B27
|
T/C
|
| A28
|
SA(3)
|
B28
|
BALE
|
| A29
|
SA(2)
|
B29
|
+5 VOLTS
|
| A30
|
SA(1)
|
B30
|
Oscillator
|
| A31
|
SA(0)
|
B31
|
GROUND
|
| C1
|
SBHE#
|
D1
|
MEMCS16#
|
| C2
|
LA(23)
|
D2
|
IO CS16#
|
| C3
|
LA(22)
|
D3
|
IRQ10
|
| C4
|
LA(21)
|
D4
|
IRQ11
|
| C5
|
LA(20)
|
D5
|
IRQ12
|
| C6
|
LA(19)
|
D6
|
IRQ15
|
| C7
|
LA(18)
|
D7
|
IRQ14
|
| C8
|
LA(17)
|
D8
|
DACK0#
|
| C9
|
MEMR#
|
D9
|
DRQ0
|
| C10
|
MEMW#
|
D10
|
DACK5#
|
| C11
|
SD(8)
|
D11
|
DRQ5
|
| C12
|
SD(9)
|
D12
|
DACK6#
|
| C13
|
SD(10)
|
D13
|
DRQ6
|
| C14
|
SD(11)
|
D14
|
DACK7#
|
| C15
|
SD(12)
|
D15
|
DRQ7
|
| C16
|
SD(13)
|
D16
|
+5 VOLTS
|
| C17
|
SD(14)
|
D17
|
MASTER#
|
| C18
|
SD(15)
|
D18
|
GROUND
|
