+ Addition
An instruction containing the operation "
+
" directs the computer to add the contents of the
selected register (addend) to the contents of the Aregister (augend) and is executed in two
phases:
1ST PHASE Transfer the contents of the selected register (addend) to M, while retaining
them in the original register.
2ND PHASE Add the contents of M to the contents of A (augend), obtaining in A the
sum is in R. M contains the addend.
___________________________________________________________________________
RESULTS
INSTRUCTION PHASE 1 PHASE 2 TRUNCATED COMPLETE______________
+ A + M A R
R + R
M A + M A R
A + A
M A + M A R
B + b
M A + M A R
B + B
M A + M A R
C + c
M A + M A R
C + C
M A + M A R
D + d
M A + M A R
D + D
M A + M A R
E + e
M A + M A R
E + E
M A + M A R
F + f
M A + M A R
F + F
M A + M A R
___________________________________________________________________________
EXAMPLE: Decimal Wheel set at 2.
______________________________________
M A R B _
BEFORE 5 7.2567 9.00 3.255
B+
AFTER 3.255 10.51 10.5117 3.255
___________________________________________________________________________
An example of using this instruction manually to add 2 factors would be:
Enter factor 1 on keyboard and transfer to A Register by depressing "
" . . . . 1.1532
Enter factor 2 on keyboard and add to A register by depressing "+". . . . . . . . 16.33236 +
Print sum by depressing key A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17.48556 A
For this example the Decimal Wheel was set at 5.
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