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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
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

All rights reserved 1999, any information used is at your own risk.
Do take proper precautions when working with electronic parts,
some can hold electrical discharges.

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