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// license:GPL-2.0+
// copyright-holders:Dirk Best
/***************************************************************************
Commodore A2052
Zorro-II RAM Expansion (0.5, 1 or 2 MB)
***************************************************************************/
#include "emu.h"
#include "a2052.h"
#define VERBOSE 1
#include "logmacro.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(ZORRO_A2052, bus::amiga::zorro::a2052_device, "zorro_a2052", "CBM A2052 Fast Memory")
namespace bus::amiga::zorro {
//-------------------------------------------------
// input_ports - device-specific input ports
//-------------------------------------------------
static INPUT_PORTS_START( a2052 )
PORT_START("config")
PORT_CONFNAME(0x03, 0x02, "A2052 Installed RAM")
PORT_CONFSETTING(0x00, "512 KB")
PORT_CONFSETTING(0x01, "1 MB")
PORT_CONFSETTING(0x02, "2 MB")
INPUT_PORTS_END
ioport_constructor a2052_device::device_input_ports() const
{
return INPUT_PORTS_NAME( a2052 );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// a2052_device - constructor
//-------------------------------------------------
a2052_device::a2052_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) :
device_t(mconfig, ZORRO_A2052, tag, owner, clock),
device_zorro2_card_interface(mconfig, *this),
m_config(*this, "config")
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void a2052_device::device_start()
{
}
//**************************************************************************
// IMPLEMENTATION
//**************************************************************************
void a2052_device::autoconfig_base_address(offs_t address)
{
LOG("%s: autoconfig_base_address received: 0x%06x\n", shortname(), address);
LOG("-> installing a2052\n");
// stop responding to default autoconfig
m_slot->space().unmap_readwrite(0xe80000, 0xe8007f);
// install access to the rom space
m_slot->space().install_ram(address, address + m_ram.size()*2 - 1, &m_ram[0]);
// we're done
m_slot->cfgout_w(0);
}
WRITE_LINE_MEMBER( a2052_device::cfgin_w )
{
LOG("%s: configin_w (%d)\n", shortname(), state);
if (state == 0)
{
// setup autoconfig
autoconfig_board_type(BOARD_TYPE_ZORRO2);
// setup ram
switch (m_config->read())
{
case 0:
autoconfig_board_size(BOARD_SIZE_512K);
m_ram.resize(0x080000/2);
break;
case 1:
autoconfig_board_size(BOARD_SIZE_1M);
m_ram.resize(0x100000/2);
break;
case 2:
autoconfig_board_size(BOARD_SIZE_2M);
m_ram.resize(0x200000/2);
break;
}
autoconfig_product(0x0a);
autoconfig_manufacturer(0x0202);
autoconfig_serial(0x00000000);
autoconfig_link_into_memory(true);
autoconfig_rom_vector_valid(false);
autoconfig_multi_device(false);
autoconfig_8meg_preferred(false);
autoconfig_can_shutup(true); // ?
// install autoconfig handler
m_slot->space().install_readwrite_handler(0xe80000, 0xe8007f,
read16_delegate(*this, FUNC(amiga_autoconfig::autoconfig_read)),
write16_delegate(*this, FUNC(amiga_autoconfig::autoconfig_write)), 0xffff);
}
}
} // namespace bus::amiga::zorro
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