M72 R-3A

Found on...

• R-Type (M72)

Equations

/** Inputs **/
Pin	1 = COD12;
Pin	2 = COD11;
Pin	3 = BANK;
Pin	4 = DBEN;
Pin	5 = M_IO;
Pin	6 = A19;
Pin	7 = A18;
Pin	8 = A17;
Pin	9 = A16;

/** Outputs **/
Pin	12 = LS245_EN; /**(Combinatorial, No output feedback, Active low) **/
Pin	13 = ROM1_CE; /**(Combinatorial, Output feedback output, Active low) **/
Pin	14 = ROM2_CE; /**(Combinatorial, Output feedback output, Active low) **/
Pin	17 = RAM_CS2; /**(Combinatorial, Output feedback output, Active high) **/
Pin	18 = S; /**(Combinatorial, Output feedback output, Active high) **/
Pin	19 = nS; /**(Combinatorial, No output feedback, Active high) **/

/** Equations **/

!LS245_EN = !DBEN & M_IO & !A19 & !A18
     # !DBEN & M_IO & !A19 & !A17
     # !DBEN & M_IO & A19 & A18 & A17 & A16;
LS245_EN.oe = vcc;

!ROM1_CE = M_IO & !A19 & !A18 & !A17;
ROM1_CE.oe = vcc;

!ROM2_CE = M_IO & !A19 & !A18 & A17
     # M_IO & A19 & A18 & A17 & A16;
ROM2_CE.oe = vcc;

RAM_CS2 = M_IO & !A19 & A18 & !A17;
RAM_CS2.oe = vcc;

S = COD11;
S.oe = vcc;

nS = !COD11;
nS.oe = vcc;