//WRITE_LINE_MEMBER(write_line) // discrete_device
public void discrete_device_write_line_DS_SOUND7_INP(int state)
{
discrete_device device = (discrete_device)subdevice("discrete");
device.write_line(DS_SOUND7_INP, state);
}
static int dss_lfsr_function(discrete_device dev, int myfunc, int in0, int in1, int bitmask)
{
int retval;
in0 &= bitmask;
in1 &= bitmask;
switch (myfunc)
{
case DISC_LFSR_XOR:
retval = in0 ^ in1;
break;
case DISC_LFSR_OR:
retval = in0 | in1;
break;
case DISC_LFSR_AND:
retval = in0 & in1;
break;
case DISC_LFSR_XNOR:
retval = in0 ^ in1;
retval = retval ^ bitmask; /* Invert output */
break;
case DISC_LFSR_NOR:
retval = in0 | in1;
retval = retval ^ bitmask; /* Invert output */
break;
case DISC_LFSR_NAND:
retval = in0 & in1;
retval = retval ^ bitmask; /* Invert output */
break;
case DISC_LFSR_IN0:
retval = in0;
break;
case DISC_LFSR_IN1:
retval = in1;
break;
case DISC_LFSR_NOT_IN0:
retval = in0 ^ bitmask;
break;
case DISC_LFSR_NOT_IN1:
retval = in1 ^ bitmask;
break;
case DISC_LFSR_REPLACE:
retval = in0 & ~in1;
retval = retval | in1;
break;
case DISC_LFSR_XOR_INV_IN0:
retval = in0 ^ bitmask; /* invert in0 */
retval = retval ^ in1; /* xor in1 */
break;
case DISC_LFSR_XOR_INV_IN1:
retval = in1 ^ bitmask; /* invert in1 */
retval = retval ^ in0; /* xor in0 */
break;
default:
dev.discrete_log("dss_lfsr_function - Invalid function type passed");
retval = 0;
break;
}
return retval;
}
