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The next objective is to enter the
Me
micro program.
The insert in Figure
3-53 shows the machine-check-pulse line.
This line brings up controls to enter
the MC micro program.
The line is
active when:
1.
The priority latch is off.
2.
Switches are not being used to set W
and X.
3-74
3.
The first-machine-check latch is on.
4.
The suppress-malfunction latch is
off.
This latch determines whether
errors are to be recognized.
If
this latch is on, the line to enter
the MC micro program (machine -check
pulse) is not active.
Note: The machine-check latches are
res~t
P4 time with a reset line.
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