key in the normal position.
3. When
der specified by a
struction addressing this
Initial program reset causes initial
performed and causes I/O system reset to be per
formed in all channels configured to the
description of the effect of the reset on other parts
of the system.
Reset Function
R
2
N
R
When the reset function in the
the process of taking an
performing the initial-program-Ioading function, the
communication between the
addiitional
channels, and pending
are
signaled to the
con'figured to the
remain unchanged, provided the field is not being
accElssed at the time the reset function is perforrned.
The subsequent contents of a field are unpredictable
if it is accessed at the time of the reset.
is n'ot being accessed at the time the reset function
is performed. However, on some models the
subsequent contents' of a field are unpredictable if it
is
Summary of Reset Action
52
C*
C
C
C
2
R
R
R
C* 1 C*
1
C*
C
C
C
C
C
C
C
C
C
C/X
3
C/X3
2
2
3
The contents are cleared to zero with valid checking-block
code.
C/V The checking-block code of the contents is made valid.
The contents normally are cleared to zeros but in some
models may be left unchanged.
C/X The checking-block code of the contents is made valid.
2
3
The contents normally are cleared to zeros but in some
models may be left unpredictable.
The contents are set to their initial values with valid
checking-block code.
Clearing the contents of the
assume the BC-mode format. The contents of the
instruction-length-code and interruption-code fields remain
When the
Access to the
the time a reset function is performed does not cause the
value of the
When these units are separately powered, the action is
performed only when the power for the unit is turned on.