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// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************
ZX Spectrum Expansion Port emulation
**********************************************************************
Pinout:
A15 1 A14
A13 2 A12
D7 3 +5v
¬OE 4 NC
SLOT 5 SLOT
D0 6 0v
D1 7 0v
D2 8 ¬CK
D6 9 A0
D5 10 A1
D3 11 A2
D4 12 A3
¬INT 13 NC
¬NMI 14 0v
¬HALT 15 ¬OE
¬MREQ 16 NC
¬IORQ 17 NC
¬RD 18 NC
¬WR 19 ¬BUSRQ
NC 20 ¬RESET
¬WAIT 21 A7
+12v 22 A6
NC 23 A5
¬M1 24 A4
¬RFSH 25 ¬ROMCS
A8 26 ¬BUSACK
A10 27 A9
NC 28 A11
**********************************************************************/
#ifndef MAME_BUS_SPECTRUM_EXP_H
#define MAME_BUS_SPECTRUM_EXP_H
#pragma once
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> spectrum_expansion_slot_device
class device_spectrum_expansion_interface;
class spectrum_expansion_slot_device : public device_t, public device_slot_interface
{
public:
// construction/destruction
template <typename T>
spectrum_expansion_slot_device(machine_config const &mconfig, char const *tag, device_t *owner, T &&slot_options, const char *default_option)
: spectrum_expansion_slot_device(mconfig, tag, owner)
{
option_reset();
slot_options(*this);
set_default_option(default_option);
set_fixed(false);
}
spectrum_expansion_slot_device(machine_config const &mconfig, char const *tag, device_t *owner, uint32_t clock = 0);
template <typename T> void set_io_space(T &&tag, int spacenum) { m_io.set_tag(std::forward<T>(tag), spacenum); }
// callbacks
auto irq_handler() { return m_irq_handler.bind(); }
auto nmi_handler() { return m_nmi_handler.bind(); }
uint8_t mreq_r(offs_t offset);
void mreq_w(offs_t offset, uint8_t data);
uint8_t port_fe_r(offs_t offset);
DECLARE_READ_LINE_MEMBER( romcs );
DECLARE_WRITE_LINE_MEMBER( irq_w ) { m_irq_handler(state); }
DECLARE_WRITE_LINE_MEMBER( nmi_w ) { m_nmi_handler(state); }
required_address_space m_io;
protected:
// device-level overrides
virtual void device_config_complete() override;
virtual void device_validity_check(validity_checker &valid) const override;
virtual void device_start() override;
virtual void device_reset() override;
device_spectrum_expansion_interface *m_card;
private:
devcb_write_line m_irq_handler;
devcb_write_line m_nmi_handler;
};
// ======================> device_spectrum_expansion_interface
class device_spectrum_expansion_interface : public device_slot_card_interface
{
public:
// construction/destruction
device_spectrum_expansion_interface(const machine_config &mconfig, device_t &device);
// reading and writing
virtual uint8_t mreq_r(offs_t offset) { return 0xff; }
virtual void mreq_w(offs_t offset, uint8_t data) { }
virtual uint8_t port_fe_r(offs_t offset) { return 0xff; }
virtual DECLARE_READ_LINE_MEMBER(romcs) { return 0; }
protected:
address_space &io_space() { return *m_slot->m_io; }
spectrum_expansion_slot_device *m_slot;
};
// device type definition
DECLARE_DEVICE_TYPE(SPECTRUM_EXPANSION_SLOT, spectrum_expansion_slot_device)
void spectrum_expansion_devices(device_slot_interface &device);
void spec128_expansion_devices(device_slot_interface &device);
void specpls3_expansion_devices(device_slot_interface &device);
#endif // MAME_BUS_SPECTRUM_EXP_H
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