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// license:BSD-3-Clause
// copyright-holders:smf
#include "emu.h"
#include "vt83c461.h"
//#define VERBOSE 1
#include "logmacro.h"
#define VT83C461_CONFIG_UNK 1
#define VT83C461_CONFIG_REGISTER 2
#define VT83C461_CONFIG_DATA 3
DEFINE_DEVICE_TYPE(VT83C461, vt83c461_device, "vt83c461", "VIA VT83C461 IDE Controller")
vt83c461_device::vt83c461_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
ide_controller_32_device(mconfig, VT83C461, tag, owner, clock),
m_config_unknown(0),
m_config_register_num(0)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void vt83c461_device::device_start()
{
ide_controller_32_device::device_start();
/* register ide states */
save_item(NAME(m_config_unknown));
save_item(NAME(m_config_register));
save_item(NAME(m_config_register_num));
}
READ32_MEMBER( vt83c461_device::read_config )
{
return read_config(offset);
}
uint32_t vt83c461_device::read_config(offs_t offset)
{
uint32_t result = 0;
/* logit */
LOG("%s:IDE via config read at %X\n", machine().describe_context(), offset);
switch(offset)
{
/* unknown config register */
case VT83C461_CONFIG_UNK:
result = m_config_unknown;
break;
/* active config register */
case VT83C461_CONFIG_REGISTER:
result = m_config_register_num;
break;
/* data from active config register */
case VT83C461_CONFIG_DATA:
if (m_config_register_num < IDE_CONFIG_REGISTERS)
result = m_config_register[m_config_register_num];
break;
default:
logerror("%s:unknown IDE via config read at %03X\n", machine().describe_context(), offset);
break;
}
return result;
}
WRITE32_MEMBER( vt83c461_device::write_config )
{
write_config(offset, data);
}
void vt83c461_device::write_config(offs_t offset, uint32_t data)
{
/* logit */
LOG("%s:IDE via config write to %X = %08X\n", machine().describe_context(), offset, data);
switch (offset)
{
/* unknown config register */
case VT83C461_CONFIG_UNK:
m_config_unknown = data;
break;
/* active config register */
case VT83C461_CONFIG_REGISTER:
m_config_register_num = data;
break;
/* data from active config register */
case VT83C461_CONFIG_DATA:
if (m_config_register_num < IDE_CONFIG_REGISTERS)
m_config_register[m_config_register_num] = data;
break;
default:
logerror("%s:unknown IDE via config write at %03X = %08x\n", machine().describe_context(), offset, data);
break;
}
}
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