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BASIC INSTRUCTION SET
[2J
l'
1
1
1
1
1 0
1 0 1 0
1
1
l'
o 1
o
l'
l'
1 0 o 1
o 1 0
BEFORE
RCL
rO--i
1
1
1
1 0
1 0 1 0
1
1
1
1
1 0 1 0
1
1
l'
1 0
o 1 0 1 0
l'
Il
AFTER
RCL
BY 1 BIT _
0
--/1
1
l'
l'
o 1
o 1 0
l'
l'
1 0
o
l'
1
1 0
o 1 0
AFTER
RCL
BY
16
BITS
OPERAND
RCL
rotates
the
bits
in the
memory
or
register
operand
to
the
left
In
the
same
way
as
ROL
except
that
RCL
treats
CF as a
I·bit
extension
of
the
operand.
Note
that
a
16·bit
RCL
produces
the
same
result
as a
I·blt
RCR
(though
It
takes
much
longer
to
execute).
This
Instruction
also
operates
on
byte
operands.
G30108
Figure
3-11.
RCL
l'
l'
l'
o I 0
o
l'
l'
1 0 1 0
l'
l'
o 1
o 1 0
1 0
[]
BEFORE
RCA
r[1
1
1
l'
l'
1 0
o 1
o
l'
l'
1 0
1 0
l'
l'
lololo~~
AFTER
RCR
BY
1 BIT
___
I 0
o
l'
l'
l' l'
o 1 0
1 0
l' l'
1 0
o
l'
l'
1 0
AFTER
RCA
BY 3 BITS
OPERAND
RCR
rotates
the
bits
In the
memory
or
register
oporand
to
the
right
In
the same
way
as
ROR
except
that
RCR
treats
CF
as a
I·blt
extension
01
the operand. This
Instruction
also
operates
on
byte
operands.
G30108
Figure
3-12.
RCR
3-15