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M UL
MUL
M(S) • (A) ← (A)
Op e r a t io n :
(S) ← (S) – 1
F u n c t io n :
Multiplies Accumulator with the memory specified by the Zero
Page X addressing mode and stores the high-order byte of the
result on the Stack and the low-order byte in A.
Zero page
St a t u s fla g :
No change
Addressing mode
∆MUL∆$zz,X
Zero page X
Notes 1: This instruction changes the contents of S and A.
2: The MUL instruction can not be used for some products.
72
TIPLY ACCUMULATOR AND MEMORY
M(zz+(X))
multiplicant
product
Statement
62
M(zz+(X))
M(S)
high-order
Machine codes
Byte number
, zz
16
16
M UL
(A)
multiplier
(A)
low-order
Cycle number
2
15
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