/** Program to convert logic equations
 * of 16 inputs and 8 outputs
 * to a 64-kilobyte truth table.
 * @author Marko Mäkelä (msmakela@nic.funet.fi)
 * @date 8th July 2003, based on a version from 2nd July 2002
 * The equations in this program have been translated from the
 * MACHXL design description supplied by Jens Schönfeld (jens@ami.ga),
 * and verified against the 64-kilobyte dumps supplied by Jens Schönfeld.
 *
 * Compilation:
 *	cc -o pla 251641-3.c
 * Example usage:
 *	./pla | diff - pla-dump.bin
 * or
 *	./pla > pla-dump.bin
 */

#include <stdio.h>

/** Extract an input bit
 * @param b	the bit to be extracted
 * @return	nonzero if the input bit b is set
 */
#define I(b) (!!((i) & (1 << b)))

/** @name The input signals.
 * This mapping corresponds to the 82S100 to 27512 adapter made by
 * Jens Schönfeld (jens@ami.ga).  Note also the permutation of outputs
 * in the main loop.
 */
/*@{*/
#define I0	I(1)
#define I1	I(2)
#define I2	I(3)
#define I3	I(4)
#define I4	I(5)
#define I5	I(6)
#define I6	I(7)
#define I7	I(12)
#define I8	I(14)
#define I9	I(13)
#define I10	I(8)
#define I11	I(9)
#define I12	I(11)
#define I13	I(15)
#define I14	I(10)
#define I15	I(0)
/*@}*/

/** @name The output signals. */
/*@{*/
#define F0 !((!I15&&I0&&I1&&I2&&I3&&I4&&I5&&I6&&	\
	      I11&&I14&&!I12&&!I7&&I9&&!I8&&I13)||	\
	     (I15&&I0&&I1&&I2&&I3&&I4&&I5&&I6&&		\
	      I11&&I14&&!I12&&!I7&&I9&&I8&&I13))
#define F1 I0&&I6&&!I7
#define F2 0
#define F3 0
#define F4 0
#define F5 0
#define F6 0
#define F7 I10||(!I10&&I6&&I0&&!I7)
/*@}*/

/** The main program
 * @param argc	command line argument count
 * @param argv	command line argument vector
 * @return	zero on successful termination
 */
int
main (int argc, char** argv)
{
  /** The input combination, at least 16 bits */
  register unsigned int i = 0;
  do {
    /** The output combination, 8 bits */
    register unsigned char o = 0;
    /* The outputs are permuted so that they correspond to the adapter
     * made by Jens Schönfeld.
     */
    if (F0) o |= 1 << 6;
    if (F1) o |= 1 << 5;
    if (F2) o |= 1 << 4;
    if (F3) o |= 1 << 3;
    if (F4) o |= 1 << 2;
    if (F5) o |= 1 << 1;
    if (F6) o |= 1 << 0;
    if (F7) o |= 1 << 7;
    putchar (o);
  }
  while (++i & 0xffff);
  return 0;
}