IBM 6400 series Maintenance Manual page 363

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STBY
STK
. . . . . . . . . . . . . . . . .
SW
. . . . . . . . . . . . . . . . .
SYNC
TCB
. . . . . . . . . . . . . . . . .
TEMP
TOF
. . . . . . . . . . . . . . . . .
TP
. . . . . . . . . . . . . . . . . .
TTL
. . . . . . . . . . . . . . . . .
TXD
. . . . . . . . . . . . . . . . .
UART
UDPH
UNDEF
USART
V
. . . . . . . . . . . . . . . . . . .
V
. . . . . . . . . . . . . . . . .
CC
V
. . . . . . . . . . . . . . . . .
DD
V
. . . . . . . . . . . . . . . . .
SS
VX
. . . . . . . . . . . . . . . . . .
WR
. . . . . . . . . . . . . . . . .
w/
. . . . . . . . . . . . . . . . . . .
w/o
. . . . . . . . . . . . . . . . .
XMT
. . . . . . . . . . . . . . . .
Abbreviations and Signal Mnemonics
. . . . . . . . . . . . . . .
Standby
Power Stacker
Switch
. . . . . . . . . . . . . . .
Synchronize
Task Control Block
. . . . . . . . . . . . . . .
Temperature
Top of Form (first print line)
Test Point
Transistor-Transistor Logic
Transmit Data
. . . . . . . . . . . . . . .
Universal Asynchronous Receiver/Transmitter
. . . . . . . . . . . . . . .
Upper Drive Phase
. . . . . . . . . . . . . .
Undefined
. . . . . . . . . . . . . .
Universal Synchronous/Asynchronous
Receiver/Transmitter
Volts
Voltage at Collector
Voltage at Drain
Voltage at Source
A special ASIC containing circuits that help the DC
controller operate. The letters VX do not stand for
anything; they simply designate this ASIC.
Write
With
Without
Transmit
363

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