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// license:BSD-3-Clause
// copyright-holders:Manuel Abadia, Ernesto Corvi, Nicola Salmoria
/***************************************************************************
gaplus.cpp
Functions to emulate general aspects of the machine (RAM, ROM, interrupts,
I/O ports)
***************************************************************************/
#include "emu.h"
#include "sound/samples.h"
#include "includes/gaplus.h"
/************************************************************************************
* *
* Gaplus custom I/O chips (preliminary) *
* *
************************************************************************************/
void gaplus_base_state::customio_3_w(offs_t offset, uint8_t data)
{
if ((offset == 0x09) && (data >= 0x0f))
m_samples->start(0,0);
m_customio_3[offset] = data;
}
uint8_t gaplus_base_state::customio_3_r(offs_t offset)
{
int mode = m_customio_3[8];
switch (offset)
{
case 0:
return ioport("IN2")->read(); /* cabinet & test mode */
case 1:
return (mode == 2) ? m_customio_3[offset] : 0x0f;
case 2:
return (mode == 2) ? 0x0f : 0x0e;
case 3:
return (mode == 2) ? m_customio_3[offset] : 0x01;
default:
return m_customio_3[offset];
}
}
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