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// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************
First Byte Switched Joystick Interface
http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/FirstByte_JoystickIF.html
**********************************************************************/
#include "emu.h"
#include "fbjoy.h"
#include "bus/vcs_ctrl/ctrl.h"
namespace {
class electron_fbjoy_device
: public device_t
, public device_electron_expansion_interface
{
public:
electron_fbjoy_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, ELECTRON_FBJOY, tag, owner, clock)
, device_electron_expansion_interface(mconfig, *this)
, m_joy(*this, "joy")
{
}
virtual uint8_t expbus_r(offs_t offset) override;
protected:
// device_t overrides
virtual void device_start() override ATTR_COLD { }
// optional information overrides
virtual void device_add_mconfig(machine_config &config) override ATTR_COLD;
private:
required_device<vcs_control_port_device> m_joy;
};
//-------------------------------------------------
// device_add_mconfig - add device configuration
//-------------------------------------------------
void electron_fbjoy_device::device_add_mconfig(machine_config &config)
{
VCS_CONTROL_PORT(config, m_joy, vcs_control_port_devices, "joy");
}
//-------------------------------------------------
// expbus_r - expansion data read
//-------------------------------------------------
uint8_t electron_fbjoy_device::expbus_r(offs_t offset)
{
uint8_t data = 0xff;
if (offset == 0xfcc0)
{
data = bitswap<8>(m_joy->read_joy(), 7, 6, 4, 5, 3, 2, 1, 0);
}
return data;
}
} // anonymous namespace
DEFINE_DEVICE_TYPE_PRIVATE(ELECTRON_FBJOY, device_electron_expansion_interface, electron_fbjoy_device, "electron_fbjoy", "First Byte Joystick Interface")
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