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// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic
/*********************************************************************
ng_memcard.c
NEOGEO Memory card functions.
*********************************************************************/
#include "emu.h"
#include "emuopts.h"
#include "ng_memcard.h"
// device type definition
DEFINE_DEVICE_TYPE(NG_MEMCARD, ng_memcard_device, "ng_memcard", "NeoGeo Memory Card")
//-------------------------------------------------
// ng_memcard_device - constructor
//-------------------------------------------------
ng_memcard_device::ng_memcard_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, NG_MEMCARD, tag, owner, clock)
, device_memcard_image_interface(mconfig, *this)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void ng_memcard_device::device_start()
{
save_item(NAME(m_memcard_data));
}
/*-------------------------------------------------
memcard_insert - insert an existing memory card
with the given index
-------------------------------------------------*/
image_init_result ng_memcard_device::call_load()
{
if(length() != 0x800)
return image_init_result::FAIL;
fseek(0, SEEK_SET);
size_t ret = fread(m_memcard_data, 0x800);
if(ret != 0x800)
return image_init_result::FAIL;
return image_init_result::PASS;
}
void ng_memcard_device::call_unload()
{
fseek(0, SEEK_SET);
fwrite(m_memcard_data, 0x800);
}
image_init_result ng_memcard_device::call_create(int format_type, util::option_resolution *format_options)
{
memset(m_memcard_data, 0, 0x800);
size_t ret = fwrite(m_memcard_data, 0x800);
if(ret != 0x800)
return image_init_result::FAIL;
return image_init_result::PASS;
}
uint8_t ng_memcard_device::read(offs_t offset)
{
return m_memcard_data[offset];
}
void ng_memcard_device::write(offs_t offset, uint8_t data)
{
m_memcard_data[offset] = data;
}
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