ABEL Program #2

MODULE MUX

INTERFACE (A3..A0, S1, S0 -> B3..B0);

TITLE '4-1 Multiplexor'

"Inputs

A3..A0 PIN; " data inputs

S1, S0 PIN; " Rotate amount

"Outputs

B3..B0 PIN; " data outputs

"Aliases

A = [A3..A0];

B = [B3..B0];

S = [S1,S0];

EQUATIONS

B.OE = 0; " Default value

WHEN S == 0 THEN B0.OE = 1

ELSE WHEN S == 1 THEN B1.OE = 1

ELSE WHEN S == 2 THEN B2.OE = 1

ELSE WHEN S == 3 THEN B3.OE = 1

END

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