HP 7936 Support Manual page 190

Disc drives
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Diagrams
7936 and 7937
Table 12-1. Signal Distribution List (2 of 6)
MNEMONIC
SIGNAL
SOURCE
DESTINATION
REMARKS
OPCO
Data Path
A6PI-24
A2JI-24
Bidirectional
OPC1
Control,
A6PI-23
A2JI-23
Data Path
OPC2
bits 0
A6PI-26
A2Jl-26
Control bus
OPC3
thru 7
A6PI-25
A2Jl-25
OPC4
A6PI-28
A2Jl-28
OPCS
A6PI-27
A2Jl-27
OPC6
A6Pl-30
A2JI-30
OPC7
A6PI-29
A2JI-29
OPCS-L
Data Path
A6PI-33
A2JI-33
Data Path
Control
Control Bus
Select
OPIRQ-L
Data Path
A2Jl-36
A6PI-36
Data Path
Interrupt
control Bus
Request
OPRHW-L
Data Path
A6PI-35
A2JI-35
Data Path
Read High
Control Bus
Write Low
OSOS-H,
Dif f eren tia
1
AUl-47
A2Pl-47
OSOS-L
Start of
AUl-48
A2PI-48
Sector
OWC-H,
Differential
AUI-49
A2PI-49
OWC-L
Write
AUl-50
A2PI-50
Clock
OX,
Read/Write
A2J7-57
A3Jl-57
Bidirectional
OY
Data
A2J7-60
A3Jl-60
differential
signal
GLEO
Green LED
A6P2-3
A2J4-3
A2J6-4
A5J5-8
A5J2-5
A7Jl-l
H01S-H
Head
A2J7-9
A3Jl-9
Select
I
HOS2S-H
Head
A2J7-7
A3Jl-7
Select 2
HS1-L,
Head
A2J7-47
A3Jl-47
HS2-L
Select,
A2J7-56
A3JI-56
bits 1,2
12-4

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