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// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************
BBC User Port emulation
**********************************************************************
Pinout:
+5V 1 2 CB1
+5V 3 4 CB2
0V 5 6 PB0
0V 7 8 PB1
0V 9 10 PB2
0V 11 12 PB3
0V 13 14 PB4
0V 15 16 PB5
0V 17 18 PB6
0V 19 20 PB7
Signal Definitions:
Connected directly to the 6522 User VIA.
**********************************************************************/
#ifndef MAME_BUS_BBC_USERPORT_USERPORT_H
#define MAME_BUS_BBC_USERPORT_USERPORT_H
#pragma once
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> bbc_userport_slot_device
class device_bbc_userport_interface;
class bbc_userport_slot_device : public device_t, public device_single_card_slot_interface<device_bbc_userport_interface>
{
public:
// construction/destruction
template <typename T>
bbc_userport_slot_device(machine_config const &mconfig, char const *tag, device_t *owner, T &&slot_options, const char *default_option)
: bbc_userport_slot_device(mconfig, tag, owner)
{
option_reset();
slot_options(*this);
set_default_option(default_option);
set_fixed(false);
}
bbc_userport_slot_device(machine_config const &mconfig, char const *tag, device_t *owner, uint32_t clock = 0);
// callbacks
auto cb1_handler() { return m_cb1_handler.bind(); }
auto cb2_handler() { return m_cb2_handler.bind(); }
DECLARE_WRITE_LINE_MEMBER(cb1_w) { m_cb1_handler(state); }
DECLARE_WRITE_LINE_MEMBER(cb2_w) { m_cb2_handler(state); }
uint8_t pb_r();
void pb_w(uint8_t data);
protected:
// device-level overrides
virtual void device_start() override;
device_bbc_userport_interface *m_device;
private:
devcb_write_line m_cb1_handler;
devcb_write_line m_cb2_handler;
};
// ======================> device_bbc_userport_interface
class device_bbc_userport_interface : public device_interface
{
public:
// construction/destruction
virtual ~device_bbc_userport_interface();
virtual uint8_t pb_r() { return 0xff; }
virtual void pb_w(uint8_t data) { }
protected:
device_bbc_userport_interface(const machine_config &mconfig, device_t &device);
bbc_userport_slot_device *m_slot;
};
// device type definition
DECLARE_DEVICE_TYPE(BBC_USERPORT_SLOT, bbc_userport_slot_device)
void bbc_userport_devices(device_slot_interface &device);
#endif // MAME_BUS_BBC_USERPORT_USERPORT_H
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