User's Manual

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