static READ16_HANDLER( syvalion_input_bypass_r )
{
/* Bypass TC0220IOC controller for analog input */
data8_t port = TC0220IOC_port_r(0); /* read port number */
switch( port )
{
case 0x08: /* trackball y coords bottom 8 bits for 2nd player */
return input_port_7_r(0);
case 0x09: /* trackball y coords top 8 bits for 2nd player */
if (input_port_7_r(0) & 0x80) /* y- direction (negative value) */
return 0xff;
else /* y+ direction (positive value) */
return 0x00;
case 0x0a: /* trackball x coords bottom 8 bits for 2nd player */
return input_port_6_r(0);
case 0x0b: /* trackball x coords top 8 bits for 2nd player */
if (input_port_6_r(0) & 0x80) /* x- direction (negative value) */
return 0xff;
else /* x+ direction (positive value) */
return 0x00;
case 0x0c: /* trackball y coords bottom 8 bits for 2nd player */
return input_port_5_r(0);
case 0x0d: /* trackball y coords top 8 bits for 1st player */
if (input_port_5_r(0) & 0x80) /* y- direction (negative value) */
return 0xff;
else /* y+ direction (positive value) */
return 0x00;
case 0x0e: /* trackball x coords bottom 8 bits for 1st player */
return input_port_4_r(0);
case 0x0f: /* trackball x coords top 8 bits for 1st player */
if (input_port_4_r(0) & 0x80) /* x- direction (negative value) */
return 0xff;
else /* x+ direction (positive value) */
return 0x00;
default:
return TC0220IOC_portreg_r( offset );
}
}
/***************************************************************************
Interrupt
Super Breakout has a three-position dial used to select which game to
play - Progressive, Double, and Cavity. We use the interrupt to check
for a key press representing one of these three choices and set our
game switch appropriately. We can't just check for key values at the time
the game checks the game switch, because we would probably lose a *lot* of
key presses. Also, MAME doesn't currently support a switch control like
DIP switches that's used as a runtime control.
***************************************************************************/
int sbrkout_interrupt(void)
{
int game_switch;
game_switch=input_port_7_r(0);
if (game_switch & 0x01)
sbrkout_game_switch=SBRKOUT_PROGRESSIVE;
else if (game_switch & 0x02)
sbrkout_game_switch=SBRKOUT_DOUBLE;
else if (game_switch & 0x04)
sbrkout_game_switch=SBRKOUT_CAVITY;
return interrupt();
}
void adam_paddle_callback (int param)
{
int port7 = input_port_7_r (0);
int port8 = input_port_8_r (0);
if (port7 == 0)
adam_joy_stat[0] = 0;
else if (port7 & 0x08)
adam_joy_stat[0] = -1;
else
adam_joy_stat[0] = 1;
if (port8 == 0)
adam_joy_stat[1] = 0;
else if (port8 & 0x08)
adam_joy_stat[1] = -1;
else
adam_joy_stat[1] = 1;
if (adam_joy_stat[0] || adam_joy_stat[1])
cpunum_set_input_line (0, 0, HOLD_LINE);
}
