machine_config::machine_config(const game_driver &gamedrv, emu_options &options)
: m_minimum_quantum(attotime::zero)
, m_gamedrv(gamedrv)
, m_options(options)
, m_root_device()
, m_default_layouts([] (char const *a, char const *b) { return 0 > std::strcmp(a, b); })
, m_current_device(nullptr)
{
// add the root device
device_add("root", gamedrv.type, 0);
// intialize slot devices - make sure that any required devices have been allocated
for (device_slot_interface &slot : slot_interface_iterator(root_device()))
{
device_t &owner = slot.device();
const char *slot_option_name = owner.tag() + 1;
// figure out which device goes into this slot
bool const has_option = options.has_slot_option(slot_option_name);
const char *selval;
bool is_default;
if (!has_option)
{
// The only time we should be getting here is when emuopts.cpp is invoking
// us to evaluate slot/image options, and the internal state of emuopts.cpp has
// not caught up yet
selval = slot.default_option();
is_default = true;
}
else
{
const slot_option &opt = options.slot_option(slot_option_name);
selval = opt.value().c_str();
is_default = !opt.specified();
}
if (selval && *selval)
{
// TODO: make this thing more self-contained so it can apply itself - shouldn't need to know all this here
device_slot_interface::slot_option const *option = slot.option(selval);
if (option && (is_default || option->selectable()))
{
// create the device
token const tok(begin_configuration(owner));
device_t *const new_dev = device_add(option->name(), option->devtype(), option->clock());
slot.set_card_device(new_dev);
char const *const default_bios = option->default_bios();
if (default_bios != nullptr)
new_dev->set_default_bios_tag(default_bios);
auto additions = option->machine_config();
if (additions)
additions(new_dev);
input_device_default const *const input_device_defaults = option->input_device_defaults();
if (input_device_defaults)
new_dev->set_input_default(input_device_defaults);
}
else
throw emu_fatalerror("Unknown slot option '%s' in slot '%s'", selval, owner.tag()+1);
}
}
// then notify all devices that their configuration is complete
for (device_t &device : device_iterator(root_device()))
if (!device.configured())
device.config_complete();
}
