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ISA - EISA / VESA Bus Connector Layout


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


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