Z80DAISY.C

John Zaicev написал(а) к All в Jun 17 15:38:31 по местному времени:

[√] Приветствую, All !

/*************************************************************************

z80daisy.c

Z80/180 daisy chaining support functions.

*************************************************************************/

#include "cpuintrf.h"
#include "mame.h"
#include "z80daisy.h"


void z80daisyreset(const struct z80_irq_daisychain *daisy)
{
/ loop over all devices and call their reset function /
for ( ; daisy->param != -1; daisy++)
if (daisy->reset)
(*daisy->reset)(daisy->param);
}


int z80daisyupdate_irq_state(const struct z80_irq_daisychain *daisy)
{
/ loop over all devices; dev[0] is highest priority /
for ( ; daisy->param != -1; daisy++)
{
int state = (*daisy->irq_state)(daisy->param);

/ if this device is asserting the INT line, that's the one we want /
if (state & Z80DAISYINT)
return ASSERT_LINE;

/ if this device is asserting the IEO line, it blocks everyone else /
if (state & Z80DAISYIEO)
return CLEAR_LINE;
}

return CLEAR_LINE;
}


int z80daisycall_ack_device(const struct z80_irq_daisychain *daisy)
{
/ loop over all devices; dev[0] is the highest priority /
for ( ; daisy->param != -1; daisy++)
{
int state = (*daisy->irq_state)(daisy->param);

/ if this device is asserting the INT line, that's the one we want /
if (state & Z80DAISYINT)
return (*daisy->irq_ack)(daisy->param);
}

logerror("z80daisycall_ackdevice: failed to find an device to ack!\n");
return 0;
}


void z80daisycall_reti_device(const struct z80_irq_daisychain *daisy)
{
/ loop over all devices; dev[0] is the highest priority /
for ( ; daisy->param != -1; daisy++)
{
int state = (*daisy->irq_state)(daisy->param);

/ if this device is asserting the IEO line, that's the one we want /
if (state & Z80DAISYIEO)
{
(*daisy->irq_reti)(daisy->param);
return;
}
}

logerror("z80daisycall_retidevice: failed to find an device to reti!\n");
}

Вроде бы ничего не забыл...
[√] До скорого, All !

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