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// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************
BBC Master Internal Modem port
**********************************************************************
Pinout:
1 NIRQ
2 NRST
3 BD0
4 BD1
5 BD2
6 BD3
7 BD4
8 BD5
9 BD6
10 BD7
11 MODEM
12 A0
13 A1
14 A2
15 A3
16 1MHzE
17 R/W
18 +5V
19 -5V
20 0V
**********************************************************************/
#ifndef MAME_BUS_BBC_MODEM_MODEM_H
#define MAME_BUS_BBC_MODEM_MODEM_H
#pragma once
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> bbc_modem_slot_device
class device_bbc_modem_interface;
class bbc_modem_slot_device : public device_t, public device_single_card_slot_interface<device_bbc_modem_interface>
{
public:
// construction/destruction
template <typename T>
bbc_modem_slot_device(machine_config const &mconfig, char const *tag, device_t *owner, const XTAL &clock, T &&slot_options, const char *default_option)
: bbc_modem_slot_device(mconfig, tag, owner, clock)
{
option_reset();
slot_options(*this);
set_default_option(default_option);
set_fixed(false);
}
bbc_modem_slot_device(machine_config const &mconfig, char const *tag, device_t *owner, const XTAL &clock);
// callbacks
auto irq_handler() { return m_irq_handler.bind(); }
virtual uint8_t read(offs_t offset);
virtual void write(offs_t offset, uint8_t data);
DECLARE_WRITE_LINE_MEMBER( irq_w ) { m_irq_handler(state); }
protected:
// device-level overrides
virtual void device_start() override;
device_bbc_modem_interface *m_card;
private:
devcb_write_line m_irq_handler;
};
// ======================> device_bbc_modem_interface
class device_bbc_modem_interface : public device_interface
{
public:
virtual uint8_t read(offs_t offset) { return 0xff; }
virtual void write(offs_t offset, uint8_t data) { }
protected:
device_bbc_modem_interface(const machine_config &mconfig, device_t &device);
bbc_modem_slot_device *m_slot;
};
// device type definition
DECLARE_DEVICE_TYPE(BBC_MODEM_SLOT, bbc_modem_slot_device)
void bbcm_modem_devices(device_slot_interface &device);
#endif // MAME_BUS_BBC_MODEM_MODEM_H
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