ISA - EISA / VESA Bus Connector Layout (98-Pin)
ISA - EISA Bus Specifications - Revision 2.0
Each EISA connector output signal is capable of driving two low-power Schottky loads.
For the Type 1 system board, the EISA bus is driven at 8.25MHz, for the Type 2 system board,
the bus is driven at 7.5MHz.
Pin
Signal
Pin
Signal
B1
Ground
A1
-IOCHCK
B2
RESET DRV
A2
SD7
B3
+5 V
A3
SD6
B4
IRQ2
A4
SD5
B5
-5 V
A5
SD4
B6
DRQ2
A6
SD3
B7
-12 V
A7
SD2
B8
-OWS
A8
SD1
B9
+12 V
A9
SD0
B10
Ground
A10
IOCHRDY
B11
-SMEMW
A11
AEN
B12
-SMEMR
A12
SA19
B13
-IOW
A13
SA18
B14
-IOR
A14
SA17
B15
-DACK3
A15
SA16
B16
-DRQ3
A16
SA15
B17
-DACK1
A17
SA14
B18
-DRQ1
A18
SA13
B19
-REFRESH
A19
SA12
B20
CLK
A20
SA11
B21
IRQ7
A21
SA10
B22
IRQ6
A22
SA9
B23
IRQ5
A23
SA8
B24
IRQ4
A24
SA7
B25
IRQ3
A25
SA6
B26
-DACK2
A26
SA5
B27
TC
A27
SA4
B28
BALE
A28
SA3
B29
+5 V
A29
SA2
B30
OSC
A30
SA1
B31
Ground
A31
SA0
Pin
16-Bit ext.
Pin
16-Bit ext.
D1
-MEMCS16
C1
-SBHE
D2
-IOCS16
C2
LA23
D3
IRQ10
C3
LA22
D4
IRQ11
C4
LA21
D5
IRQ12
C5
LA20
D6
IRQ15
C6
LA19
D7
IRQ14
C7
LA18
D8
-DACK0
C8
LA17
D9
DRQ0
C9
-MEMR
D10
-DACK5
C10
-MEMW
D11
-DRQ5
C11
SD8
D12
-DACK6
C12
SD9
D13
-DRQ6
C13
SD10
D14
-DACK7
C14
SD11
D15
-DRQ7
C15
SD12
D16
+5 V
C16
SD13
D17
-MASTER
C17
SD14
D18
Ground
C18
SD15
Pin
VESA BUS
Pin
VESA BUS
F1
Ground
E1
-CMD
F2
+5 V
E2
-START
F3
+5 V
E3
EXRDY
F4
N.U.
E4
-EX32
F5
N.U.
E5
Ground
F6
Key
E6
Key
F7
N.U.
E7
-EX16
F8
N.U.
E8
-SLBURST
F9
+12 V
E9
-MSBURST
F10
-M/IO
E10
-W/R
F11
-LOCK
E11
Ground
F12
Reserved
E12
Reserved
F13
Ground
E13
Reserved
F14
Reserved
E14
Reserved
F15
-BE3
E15
Ground
F16
Key
E16
Key
F17
-BE2
E17
-BE1
F18
-BE0
E18
-LA31
F19
Ground
E19
Ground
F20
+5 V
E20
-LA30
F21
-LA29
E21
-LA28
F22
Ground
E22
-LA27
F23
-LA26
E23
-LA25
F24
-LA24
E24
Ground
F25
Key
E25
Key
F26
LA16
E26
LA15
F27
LA14
E27
LA13
F28
+5 V
E28
LA12
F29
+5 V
E29
LA11
F30
Ground
E30
Ground
F31
LA10
E31
LA9
H1
LA8
G1
LA7
H2
LA6
G2
Ground
H3
LA5
G3
LA4
H4
+5 V
G4
LA3
H5
LA2
G5
Ground
H6
Key
G6
Key
H7
SD16
G7
SD17
H8
SD18
G8
SD19
H9
Ground
G9
SD20
H10
SD21
G10
SD22
H11
SD23
G11
Ground
H12
SD24
G12
SD25
H13
Ground
G13
SD26
H14
SD27
G14
SD28
H15
Key
G15
Key
H16
SD29
G16
Ground
H17
+5 V
G17
SD30
H18
+5 V
G18
SD31
H19
-MAKx
G19
-MREQx
Please see the LEGAL - Trademark notice.
Feel free - send a for any BUG on this page found - Thank you.