Load
Scratch
Pad
(LSP)
General Description
Format
(55)
Condition Code
Interrupt
Action
Notes
Privileged
Instructions
• Operands
from
main
memory,
starting
with
the
storage
location specified
by
the
second address (B
2
/D
2
),
are
loaded
in
the
scratch-pad memory
starting
at
the
location specified
by
the
first address (B1/D
1
).
D8
L
o
7 8
15 16 19 20
31 32 35 36
47
• Unchanged except when
the
P counter in scratch-pad memory is loaded.
• Privileged operation.
Address
error:
Addressing.
Specification.
• 1. The L field provides
an
eight-bit count specifying
the
number
of
scratch-pad memory locations to be loaded.
An
initial count
of
zero
specifies one word to be loaded.
2.
The first address specifies scratch-pad memory words 0
through
127
by
the
seven
rightmost
bits
of
the
address.
The
bits to
the
left
of
the
seven-bit address
must
be zero.
3. The second address
must
be on a word boundary.
(This
is a
program
restriction.)
4. The processor uses utility
registers
in scratch-pad memory to execute
this
instruction.
If
these
registers
are
included
in
the
range
of
this
instruction
results
are
unpredictable.
102
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