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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Dela 7x8K EPROM cartridge emulation
**********************************************************************/
#include "emu.h"
#include "dela_ep7x8.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(C64_DELA_EP7X8, c64_dela_ep7x8_cartridge_device, "c64_dela_ep7x8", "C64 Dela 7x8KB EPROM cartridge")
//-------------------------------------------------
// device_add_mconfig - add device configuration
//-------------------------------------------------
void c64_dela_ep7x8_cartridge_device::device_add_mconfig(machine_config &config)
{
GENERIC_SOCKET(config, m_eprom[0], generic_linear_slot, nullptr, "bin,rom");
GENERIC_SOCKET(config, m_eprom[1], generic_linear_slot, nullptr, "bin,rom");
GENERIC_SOCKET(config, m_eprom[2], generic_linear_slot, nullptr, "bin,rom");
GENERIC_SOCKET(config, m_eprom[3], generic_linear_slot, nullptr, "bin,rom");
GENERIC_SOCKET(config, m_eprom[4], generic_linear_slot, nullptr, "bin,rom");
GENERIC_SOCKET(config, m_eprom[5], generic_linear_slot, nullptr, "bin,rom");
GENERIC_SOCKET(config, m_eprom[6], generic_linear_slot, nullptr, "bin,rom");
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// c64_dela_ep7x8_cartridge_device - constructor
//-------------------------------------------------
c64_dela_ep7x8_cartridge_device::c64_dela_ep7x8_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) :
device_t(mconfig, C64_DELA_EP7X8, tag, owner, clock),
device_c64_expansion_card_interface(mconfig, *this),
m_eprom(*this, "rom%u", 1U)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void c64_dela_ep7x8_cartridge_device::device_start()
{
// state saving
save_item(NAME(m_bank));
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void c64_dela_ep7x8_cartridge_device::device_reset()
{
m_bank = 0xfe;
m_exrom = 0;
}
//-------------------------------------------------
// c64_cd_r - cartridge data read
//-------------------------------------------------
uint8_t c64_dela_ep7x8_cartridge_device::c64_cd_r(offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2)
{
if (!roml)
{
offs_t addr = offset & 0x1fff;
if (!BIT(m_bank, 0)) data |= m_roml[addr];
if (!BIT(m_bank, 1)) data |= m_eprom[0]->read_rom(addr);
if (!BIT(m_bank, 2)) data |= m_eprom[1]->read_rom(addr);
if (!BIT(m_bank, 3)) data |= m_eprom[2]->read_rom(addr);
if (!BIT(m_bank, 4)) data |= m_eprom[3]->read_rom(addr);
if (!BIT(m_bank, 5)) data |= m_eprom[4]->read_rom(addr);
if (!BIT(m_bank, 6)) data |= m_eprom[5]->read_rom(addr);
if (!BIT(m_bank, 7)) data |= m_eprom[6]->read_rom(addr);
}
return data;
}
//-------------------------------------------------
// c64_cd_w - cartridge data write
//-------------------------------------------------
void c64_dela_ep7x8_cartridge_device::c64_cd_w(offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2)
{
if (!io1)
{
m_bank = data;
m_exrom = (data == 0xff);
}
}
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