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
Transfer the contents of the addressed register to M, while retaining them
in the original register.
2ND PHASE
Multiply the contents of M by the contents of A. obtaining in A the product
truncated according to the setting of the Decimal Wheel. The complete
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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