02-24-01

Found on...

• Ataxx

Equations

/* Ataxx Joystick PAL (Joystick 1 Up/Down) */

/* Dedicated input pins */

pin 1   = I0; /* Input */
pin 2   = I1; /* Input */
pin 3   = I2; /* Unused input */
pin 4   = I3; /* Unused input */
pin 5   = I4; /* Unused input */
pin 6   = I5; /* Unused input */
pin 7   = I6; /* Input */
pin 8   = I7; /* Input */
pin 9   = I8; /* Input */
pin 11  = I9; /* Input */

/* Programmable output pins */

pin 12  = B0; /* Combinatorial output */
pin 13  = B1; /* Unused input */
pin 14  = B2; /* Unused input */
pin 15  = B3; /* Unused input */
pin 16  = B4; /* Unused input */
pin 17  = B5; /* Combinatorial output w/ output enable */
pin 18  = B6; /* Combinatorial output w/ output enable */
pin 19  = B7; /* Unused input */

/* Output equations */

!B6 = !I1;
!B5 = !I0;
!B0 = !I6 & !I7 & !I8;

/* Output enable equations */

 B6.oe = !I9;
 B5.oe = !I9;