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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Commodore Plus/4 Expansion Port emulation
**********************************************************************
GND 1 A GND
+5V 2 B C1 LOW
+5V 3 C _BRESET
_IRQ 4 D _RAS
R/_W 5 E phi0
C1 HIGH 6 F A15
C2 LOW 7 H A14
C2 HIGH 8 J A13
_CS1 9 K A12
_CS0 10 L A11
_CAS 11 M A10
MUX 12 N A9
BA 13 P A8
D7 14 R A7
D6 15 S A6
D5 16 T A5
D4 17 U A4
D3 18 V A3
D2 19 W A2
D1 20 X A1
D0 21 Y A0
AEC 22 Z N.C. (RAMEN)
EXT AUDIO 23 AA N.C.
phi2 24 BB N.C.
GND 25 CC GND
**********************************************************************/
#ifndef MAME_BUS_PLUS4_EXP_H
#define MAME_BUS_PLUS4_EXP_H
#pragma once
#include "imagedev/cartrom.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> plus4_expansion_slot_device
class device_plus4_expansion_card_interface;
class plus4_expansion_slot_device : public device_t,
public device_single_card_slot_interface<device_plus4_expansion_card_interface>,
public device_cartrom_image_interface
{
public:
// construction/destruction
template <typename T>
plus4_expansion_slot_device(machine_config const &mconfig, char const *tag, device_t *owner, const XTAL &clock, T &&opts, char const *dflt)
: plus4_expansion_slot_device(mconfig, tag, owner, clock)
{
option_reset();
opts(*this);
set_default_option(dflt);
set_fixed(false);
}
plus4_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
auto irq_wr_callback() { return m_write_irq.bind(); }
auto cd_rd_callback() { return m_read_dma_cd.bind(); }
auto cd_wr_callback() { return m_write_dma_cd.bind(); }
auto aec_wr_callback() { return m_write_aec.bind(); }
// computer interface
uint8_t cd_r(offs_t offset, uint8_t data, int ba, int cs0, int c1l, int c2l, int cs1, int c1h, int c2h);
void cd_w(offs_t offset, uint8_t data, int ba, int cs0, int c1l, int c2l, int cs1, int c1h, int c2h);
// cartridge interface
uint8_t dma_cd_r(offs_t offset) { return m_read_dma_cd(offset); }
void dma_cd_w(offs_t offset, uint8_t data) { m_write_dma_cd(offset, data); }
DECLARE_WRITE_LINE_MEMBER( irq_w ) { m_write_irq(state); }
DECLARE_WRITE_LINE_MEMBER( aec_w ) { m_write_aec(state); }
XTAL phi2() { return clock(); }
protected:
// device-level overrides
virtual void device_start() override;
// image-level overrides
virtual image_init_result call_load() override;
virtual bool is_reset_on_load() const noexcept override { return true; }
virtual const char *image_interface() const noexcept override { return "plus4_cart"; }
virtual const char *file_extensions() const noexcept override { return "rom,bin"; }
// slot interface overrides
virtual std::string get_default_card_software(get_default_card_software_hook &hook) const override;
devcb_write_line m_write_irq;
devcb_read8 m_read_dma_cd;
devcb_write8 m_write_dma_cd;
devcb_write_line m_write_aec;
device_plus4_expansion_card_interface *m_card;
};
// ======================> device_plus4_expansion_card_interface
class device_plus4_expansion_card_interface : public device_interface
{
friend class plus4_expansion_slot_device;
public:
// construction/destruction
virtual ~device_plus4_expansion_card_interface();
// runtime
virtual uint8_t plus4_cd_r(offs_t offset, uint8_t data, int ba, int cs0, int c1l, int c2l, int cs1, int c1h, int c2h) { return data; }
virtual void plus4_cd_w(offs_t offset, uint8_t data, int ba, int cs0, int c1l, int c2l, int cs1, int c1h, int c2h) { }
protected:
device_plus4_expansion_card_interface(const machine_config &mconfig, device_t &device);
std::unique_ptr<uint8_t[]> m_c1l;
std::unique_ptr<uint8_t[]> m_c1h;
std::unique_ptr<uint8_t[]> m_c2l;
std::unique_ptr<uint8_t[]> m_c2h;
size_t m_c1l_size;
size_t m_c1h_size;
size_t m_c2l_size;
size_t m_c2h_size;
plus4_expansion_slot_device *m_slot;
};
// device type definition
DECLARE_DEVICE_TYPE(PLUS4_EXPANSION_SLOT, plus4_expansion_slot_device)
void plus4_expansion_cards(device_slot_interface &device);
#endif // MAME_BUS_PLUS4_EXP_H
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