B93-08

Found on...

• Rambo 3

Equations

/** Inputs **/
Pin	1 = UDS;
Pin	2 = A19;
Pin	3 = A18;
Pin	4 = A21;
Pin	5 = A22;
Pin	6 = A23;
Pin	7 = FC0;
Pin	8 = FC1;
Pin	9 = FC2;
Pin	11 = AS;

/** Outputs **/
Pin	12 = ROM0; /**(Combinatorial, Output feedback output, Active low) **/
Pin	13 = DTACK; /**(Combinatorial, Output feedback output, Active low) **/
Pin	14 = SOUND; /**(Combinatorial, Output feedback output, Active low) **/
Pin	15 = IOC; /**(Combinatorial, Output feedback output, Active low) **/
Pin	16 = DAR; /**(Combinatorial, Output feedback output, Active low) **/
Pin	17 = VCU; /**(Combinatorial, Output feedback output, Active low) **/
Pin	18 = RAM; /**(Combinatorial, Output feedback output, Active low) **/
Pin	19 = ROM1; /**(Combinatorial, Output feedback output, Active low) **/

/** Equations **/

!ROM0 = !A18 & !A21 & !A22 & !A23 & !FC0 & FC1 & !AS
     # !A18 & !A21 & !A22 & !A23 & FC0 & !FC1 & !AS;

!DTACK = A21 & A22 & !AS
     # !A21 & A23 & !AS
     # !A22 & !A23 & !AS
     # FC0 & FC1 & !AS
     # !FC0 & !FC1 & !AS;
DTACK.oe = DAR & VCU

!SOUND = A21 & !A22 & !A23 & !FC0 & FC1 & !AS
     # A21 & !A22 & !A23 & FC0 & !FC1 & !AS;

!IOC = A21 & A22 & !A23 & !FC0 & FC1 & !AS
     # A21 & A22 & !A23 & FC0 & !FC1 & !AS;

!DAR = A21 & !A22 & A23 & !FC0 & FC1 & !AS
     # A21 & !A22 & A23 & FC0 & !FC1 & !AS;

!VCU = !A21 & A22 & !A23 & !FC0 & FC1 & !AS
     # !A21 & A22 & !A23 & FC0 & !FC1 & !AS;

!RAM = !A21 & !A22 & A23 & !FC0 & FC1 & !AS
     # !A21 & !A22 & A23 & FC0 & !FC1 & !AS;

!ROM1 = A18 & !A21 & !A22 & !A23 & !FC0 & FC1 & !AS
     # A18 & !A21 & !A22 & !A23 & FC0 & !FC1 & !AS;