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xavix2: minimal i2c hookup that, unsurprisingly, doesn't work (nw)

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This commit is contained in:
Olivier Galibert 2020-02-22 16:45:18 +01:00
parent c849d1dc42
commit 96186959c4
1 changed files with 12 additions and 2 deletions
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14
src/mame/drivers/xavix2.cpp
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@ -17,6 +17,7 @@
#include "softlist.h"
#include "speaker.h"
#include "cpu/xavix2/xavix2.h"
#include "machine/i2cmem.h"
class xavix2_state : public driver_device
{
@ -25,6 +26,7 @@ public:
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_screen(*this, "screen")
, m_i2cmem(*this, "i2cmem")
{ }
void xavix2(machine_config &config);
@ -37,6 +39,7 @@ private:
required_device<xavix2_device> m_maincpu;
required_device<screen_device> m_screen;
required_device<i2c_24c08_device> m_i2cmem;
u32 m_dma_src;
u16 m_dma_dst;
@ -319,12 +322,17 @@ u16 xavix2_state::port0_ddr_r()
void xavix2_state::port0_w(u16 data)
{
m_port0_data = data;
logerror("port0 %04x\n", data);
m_i2cmem->write_sda(data & 0x20);
m_i2cmem->write_scl(data & 0x10);
logerror("port0_w %04x\n", data);
}
u16 xavix2_state::port0_r()
{
return m_port0_data;
// Slightly hacky, should take ddr into account
u16 data = m_port0_data & (m_i2cmem->read_sda() ? ~0x00 : ~0x20);
logerror("port0_r %04x\n", data);
return data;
}
/*
@ -439,6 +447,8 @@ void xavix2_state::xavix2(machine_config &config)
m_screen->set_size(640, 400);
m_screen->set_visarea(0, 639, 0, 399);
I2C_24C08(config, m_i2cmem);
/* sound hardware */
SPEAKER(config, "lspeaker").front_left();
SPEAKER(config, "rspeaker").front_right();