U UNIVAC 1218 - Bitsavers

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MULTIPLY AL (MULALB) (AL) (Y) --.-. A
Execution time: 26-49 microseconds
y = up or uSR
Multiply (AL) by (y) leaving the double
length product in A. If the factors are
considered integers, the product is an
integer in A. The multiplication process
is executed on the absolute value of the
factors, then corrected for algebraic sign.
MULTIPLY AL (MULALB) (AL) (Y) ------ A
Execution time: 30-53 microseconds
y = up or uSB
Multiply (ALJ by (y + B) leaving the double
length product in A. If the factors are
considered integers, the product is an integer
in A. The multiplication process is executed
on the absolute value of the factors, then
corrected for algebraic sign.
DIVIDE A (DIVA) (A) -7- (Y)---'AL;REMAINDER----. AU
Execution time: 48 microseconds
y = up or uSR
Divide (A) by (y) leaving the quotient in AL
and the remainder in AU. The remainder always
bears the sign of the dividend, Ai, with the
results satisfying the relationship: dividend
= quotient x divisor + remainder. Set overflow
designator if overflow occurs*. If overflow
occurs, (AL) becomes O.
Examples of the four possible sign combinations
of the dividend/divisor and the results:
Dividend Divisor Quotient.
+5 +4 +1
+5 -4 -1
-5 +4 -1
-5 -4 +1
Remainder
* The overflow designator is cleared only by the execution of instruction skip
on overflow (f, m = 50 52) or instruction skip on no overflow (f t m = 50 53).
I-B-15
+1
+1
-1
-1