static void friskyt_portB_w(int offset,int data)
{
//if (errorlog) fprintf(errorlog,"PC %04x: 8910 port B = %02x\n",cpu_get_pc(),data);
/* bit 0 is IRQ enable */
interrupt_enable_w(0,data & 1);
/* bit 1 flips screen */
/* bit 2 resets the microcontroller */
if (((portb & 4) == 0) && (data & 4))
{
/* reset and start the protection mcu */
cpu_set_reset_line(1, PULSE_LINE);
cpu_set_halt_line(1, CLEAR_LINE);
}
/* other bits unknown */
portb = data;
}
static void scanline_callback(int scanline)
{
/* update the video */
beathead_scanline_update(scanline);
/* on scanline zero, clear any halt condition */
if (scanline == 0)
cpu_set_halt_line(0, CLEAR_LINE);
/* wrap around at 262 */
scanline++;
if (scanline >= MAX_SCANLINES)
scanline = 0;
/* set the scanline IRQ */
irq_state[2] = 1;
update_interrupts();
/* set the timer for the next one */
timer_set(cpu_getscanlinetime(scanline) - hblank_offset, scanline, scanline_callback);
}
static void friskyt_init_machine(void)
{
/* start with the protection mcu halted */
cpu_set_halt_line(1, ASSERT_LINE);
}
void phozon_init_machine( void )
{
credits = coincounter1 = coincounter2 = 0;
cpu_set_halt_line(1, CLEAR_LINE);
cpu_set_halt_line(2, CLEAR_LINE);
}
