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EISA

EISA=Extended Industry Standard Architecture.
Developed by Compaq, AST, Zenith, Tandy...

+---------------------------------------------+
|            (component side)                 |
|                                             |
|___________ ISA-16bit __       ISA-8bit    __|
            |||||||||||  |||||||||||||||||||  A1(front)/B1(back)
             | | | | |    | | | | | | | | |  EISA: E1(front)/F1(back)
                   C1/D1
                  G1/H1
A,C,E,G=Component Side
A,B,F,H=Sold Side

NOT DRAWN YET (At the computer)

62+38 PIN EDGE CONNECTOR at the computer.

Pin Name Description
E1 CMD# Command Phase
E2 START# Start Phase
E3 EXRDY EISA Ready
E4 EX32# EISA Slave Size 32
E5 GND Ground
E6 KEY Access Key
E7 EX16# EISA Slave Size 16
E8 SLBURST# Slave Burst
E9 MSBURST# Master Burst
E10 W/R# Write/Read
E11 GND Ground
E12 RES Reserved
E13 RES Reserved
E14 RES Reserved
E15 GND Ground
E16 KEY Access Key
E17 BE1# Byte Enable 1
E18 LA31# Latchable Addressline 31
E19 GND Ground
E20 LA30# Latchable Addressline 30
E21 LA28# Latchable Addressline 28
E22 LA27# Latchable Addressline 27
E23 LA25# Latchable Addressline 25
E24 GND Ground
E25 KEY Access Key
E26 LA15 Latchable Addressline 15
E27 LA13 Latchable Addressline 13
E28 LA12 Latchable Addressline 12
E29 LA11 Latchable Addressline 11
E30 GND Ground
E31 LA9 Latchable Addressline 9
     
F1 GND Ground
F2 +5V +5 VDC
F3 +5V +5 VDC
F4 ---  
F5 ---  
F6 KEY Access Key
F7 ---  
F8 ---  
F9 +12V +12 VDC
F10 M/IO# Memory/Input-Output
F11 LOCK# Lock bus
F12 RES Reserved
F13 GND Ground
F14 RES Reserved
F15 BE3# Byte Enable 3
F16 KEY Access Key
F17 BE2# Byte Enable 2
F18 BE0# Byte Enable 0
F19 GND Ground
F20 +5V +5 VDC
F21 LA29# Latchable Addressline 29
F22 GND Ground
F23 LA26# Latchable Addressline 26
F24 LA24# Latchable Addressline 24
F25 KEY Access Key
F26 LA16 Latchable Addressline 16
F27 LA14 Latchable Addressline 14
F28 +5V +5 VDC
F29 +5V +5 VDC
F30 GND Ground
F31 LA10 Latchable Addressline 10
     
G1 LA7 Latchable Addressline 7
G2 GND Ground
G3 LA4 Latchable Addressline 4
G4 LA3 Latchable Addressline 3
G5 GND Ground
G6 KEY Access Key
G7 D17 Data 17
G8 D19 Data 19
G9 D20 Data 20
G10 D22 Data 22
G11 GND Ground
G12 D25 Data 25
G13 D26 Data 26
G14 D28 Data 28
G15 KEY Access Key
G16 GND Ground
G17 D30 Data 30
G18 D31 Data 31
G19 MREQx Master Request
     
H1 LA8 Latchable Addressline 8
H2 LA6 Latchable Addressline 6
H3 LA5 Latchable Addressline 5
H4 +5V +5 VDC
H5 LA2 Latchable Addressline 2
H6 KEY Access Key
H7 D16 Data 16
H8 D18 Data 18
H9 GND Ground
H10 D21 Data 21
H11 D23 Data 23
H12 D24 Data 24
H13 GND Ground
H14 D27 Data 27
H15 KEY Access Key
H16 D29 Data 29
H17 +5V +5 VDC
H18 +5V +5 VDC
H19 MAKx Master Acknowledge


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