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/*
* cpc_rom.c
* Amstrad CPC mountable ROM image device
*
*/
#include "emu.h"
#include "machine/cpc_rom.h"
#include "includes/amstrad.h"
const device_type CPC_ROM = &device_creator<cpc_rom_device>;
//**************************************************************************
// DEVICE CONFIG INTERFACE
//**************************************************************************
CPC_EXPANSION_INTERFACE(sub_exp_intf)
{
DEVCB_DEVICE_LINE_MEMBER("^^", cpc_expansion_slot_device, irq_w),
DEVCB_DEVICE_LINE_MEMBER("^^", cpc_expansion_slot_device, nmi_w),
DEVCB_NULL, // RESET
DEVCB_DEVICE_LINE_MEMBER("^^", cpc_expansion_slot_device, romdis_w), // ROMDIS
DEVCB_DEVICE_LINE_MEMBER("^^", cpc_expansion_slot_device, romen_w) // /ROMEN
};
// device machine config
static MACHINE_CONFIG_FRAGMENT( cpc_rom )
MCFG_ROMSLOT_ADD("rom1")
MCFG_ROMSLOT_ADD("rom2")
MCFG_ROMSLOT_ADD("rom3")
MCFG_ROMSLOT_ADD("rom4")
MCFG_ROMSLOT_ADD("rom5")
MCFG_ROMSLOT_ADD("rom6")
// pass-through
MCFG_CPC_EXPANSION_SLOT_ADD("exp",sub_exp_intf,cpc_exp_cards,NULL)
MACHINE_CONFIG_END
machine_config_constructor cpc_rom_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( cpc_rom );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
cpc_rom_device::cpc_rom_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
device_t(mconfig, CPC_ROM, "ROM Box", tag, owner, clock, "cpc_rom", __FILE__),
device_cpc_expansion_card_interface(mconfig, *this)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void cpc_rom_device::device_start()
{
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void cpc_rom_device::device_reset()
{
}
/*** ROM image device ***/
// device type definition
const device_type ROMSLOT = &device_creator<rom_image_device>;
//-------------------------------------------------
// rom_image_device - constructor
//-------------------------------------------------
rom_image_device::rom_image_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: device_t(mconfig, ROMSLOT, "ROM image", tag, owner, clock, "rom_image", __FILE__),
device_image_interface(mconfig, *this)
{
}
//-------------------------------------------------
// rom_image_device - destructor
//-------------------------------------------------
rom_image_device::~rom_image_device()
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void rom_image_device::device_start()
{
m_base = NULL;
}
/*-------------------------------------------------
DEVICE_IMAGE_LOAD( rom )
-------------------------------------------------*/
bool rom_image_device::call_load()
{
device_image_interface* image = this;
UINT64 size = image->length();
m_base = (UINT8*)malloc(16384);
if(size <= 16384)
{
image->fread(m_base,size);
}
else
{
image->fseek(size-16384,SEEK_SET);
image->fread(m_base,16384);
}
return IMAGE_INIT_PASS;
}
/*-------------------------------------------------
DEVICE_IMAGE_UNLOAD( rom )
-------------------------------------------------*/
void rom_image_device::call_unload()
{
free(m_base);
m_base = NULL;
}
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