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LDF
M
LOAD SPECIAL FLIP-FLOPS.
Plus FF
Contents
of
Memory
x
x x
x x
x x
18
Mnemonic
Operand
STF
M
STORE SPECIAL FLIP-FLOPS.
HLT
I
CONDITIONAL HALT.
2
Selected bits from the contents of M
are
used
to
restore the conditions (saved by a STF
instruction) of the plus, zero, even, control
bit 1, control bit 2, and parity flip-flops. Bit
position 1 goes to the even flip-flop.
Bit
position 2 goes to the zero flip-flop and bit
position 18 goes to the plus flip-flop.
Bits
8, 9, and 10 go to control bit flip-flops 1 and 2
and the parity flip-flop, respectively.
Parity FF
ontrol Bit FF 2
Control Bit FF
1
Zero FF
x
x
x x x
10
9
8
2
1
Word Times
2
The conditions of the plus, zero, even, control
bit 1, control bit 2, and parity flip-flops are
stored in M in positions 18, 2, 1, 8, 9, and 10,
respectively (same as in LDF).
1
The DATANET-30 will halt if this instruction
is executed when the INHIBIT HALT switch
on the MAINTENANCE panel is in DISABLE
position.
If
the INHIBIT HALT switch is in
the OPERA TE position, hardware load will
be initiated when this instruction is executed.
[ID£1J&~ffi:1J~ ~@------------
II-24
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