M72 A-4D

Found on...

• Air Duel
• Battle Chopper
• Dragon Breed
• Gallop
• Hammerin' Harry
• Image Fight
• Legend of Hero Tonma
• Mr Heli
• Ninja Spirit
• Saigo no Nindou
• R-Type
• X-Multiply

Equations

/** Inputs **/
Pin	2 = M_IO;
Pin	3 = IOWR;
Pin	4 = IORD;
Pin	5 = A7;
Pin	6 = A6;
Pin	7 = A3;
Pin	8 = A2;
Pin	9 = A1;

/** Outputs **/
Pin	12 = SW; /**(Combinatorial, Output feedback output, Active low) **/
Pin	13 = FLAG; /**(Combinatorial, Output feedback output, Active low) **/
Pin	14 = DSW; /**(Combinatorial, Output feedback output, Active low) **/
Pin	15 = SND; /**(Combinatorial, No output feedback, Active low) **/
Pin	16 = FSET; /**(Combinatorial, No output feedback, Active low) **/
Pin	17 = DMA_ON; /**(Combinatorial, Output feedback output, Active low) **/
Pin	18 = ISET; /**(Combinatorial, Output feedback output, Active low) **/
Pin	19 = INTCS; /**(Combinatorial, Output feedback output, Active low) **/

/** Equations **/

!SW = !IORD & !A7 & !A6 & !A3 & !A2 & !A1;
SW.oe = vcc;

!FLAG = !IORD & !A7 & !A6 & !A3 & !A2 & A1;
FLAG.oe = vcc;

!DSW = !IORD & !A7 & !A6 & !A3 & A2 & !A1;
DSW.oe = vcc;

!SND = !IOWR & !A7 & !A6 & !A3 & !A2 & !A1;
SND.oe = vcc;

!FSET = !IOWR & !A7 & !A6 & !A3 & !A2 & A1;
FSET.oe = vcc;

!DMA_ON = !IOWR & !A7 & !A6 & !A3 & A2 & !A1;
DMA_ON.oe = vcc;

!ISET = !IOWR & !A7 & !A6 & !A3 & A2 & A1;
ISET.oe = vcc;

!INTCS = !M_IO & !A7 & A6;
INTCS.oe = vcc;