x
Multiplication
An instruction containing the operation "
x
" directs the computer to multiply the contents of
the selected register (multiplicand) by the contents of the A register (multiplier) and is
executed in two phases:
1ST PHASE
in the original register.
2ND PHASE Multiply the contents of M by the contents of A. obtaining in A the product
product is in R. M contains the multiplicand.
___________________________________________________________________________
RESULTS
INSTRUCTION PHASE 1 PHASE 2 TRUNCATED COMPLETE ____________
x A x M A R
R x R
M A x M A R
A x A
M A x M A R
B x b
M A x M A R
B x B
M A x M A R
c x c
M A x M A R
e x C
M A x M A R
d x d
M A x M A R
D x D
M A x M A R
e x e
M A x M A R
E x E
M A x M A R
F x f
M A x M A R
F x F
M A x M A R
___________________________________________________________________________
EXAMPLE: Decimal Wheel set at 2.
______________________________________
M A R B _
BEFORE 5 7.25 9.00 3.25
B x
AFTER 3.25 23.56 23.5625 3.25
___________________________________________________________________________
An example of using this instruction manually would, be:
Enter the multip1ier dn the keyboard and transfer to the A register by depressing "
” 7.25
Enter the multiplicand on the keyboard and depress the "x" key . . . . . . . . . . . . . . . . 3.25
x
The product will print automatically only when the instruction is performed manually . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23.56 A
It should be noted that the complete product is available in the R register and will be printed
by depressing the keys R
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23.5625 R
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