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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
RCA Cosmac VIP Byte Input/Output port emulation
**********************************************************************
A IN 0
B IN 1
C IN 2
D IN 3
E IN 4
F IN 5
H IN 6
J IN 7
K INST
L _EF4
M OUT 0
N OUT 1
P OUT 2
R OUT 3
S OUT 4
T OUT 5
U OUT 6
V OUT 7
W Q
X _EF3
Y +5 V
Z GND
**********************************************************************/
#ifndef MAME_BUS_VIP_BYTEIO_H
#define MAME_BUS_VIP_BYTEIO_H
#pragma once
//**************************************************************************
// CONSTANTS
//**************************************************************************
#define VIP_BYTEIO_PORT_TAG "byteio"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> vip_byteio_port_device
class device_vip_byteio_port_interface;
class vip_byteio_port_device : public device_t, public device_single_card_slot_interface<device_vip_byteio_port_interface>
{
public:
// construction/destruction
template <typename T>
vip_byteio_port_device(const machine_config &mconfig, const char *tag, device_t *owner, T &&opts, const char *dflt)
: vip_byteio_port_device(mconfig, tag, owner)
{
option_reset();
opts(*this);
set_default_option(dflt);
set_fixed(false);
}
vip_byteio_port_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock = XTAL());
auto inst_callback() { return m_write_inst.bind(); }
// computer interface
uint8_t in_r();
void out_w(uint8_t data);
DECLARE_READ_LINE_MEMBER( ef3_r );
DECLARE_READ_LINE_MEMBER( ef4_r );
DECLARE_WRITE_LINE_MEMBER( q_w );
// cartridge interface
DECLARE_WRITE_LINE_MEMBER( inst_w ) { m_write_inst(state); }
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
devcb_write_line m_write_inst;
device_vip_byteio_port_interface *m_cart;
};
// ======================> device_vip_byteio_port_interface
// class representing interface-specific live c64_expansion card
class device_vip_byteio_port_interface : public device_interface
{
public:
virtual uint8_t vip_in_r() { return 0xff; }
virtual void vip_out_w(uint8_t data) { }
virtual int vip_ef3_r() { return CLEAR_LINE; }
virtual int vip_ef4_r() { return CLEAR_LINE; }
virtual void vip_q_w(int state) { }
protected:
// construction/destruction
device_vip_byteio_port_interface(const machine_config &mconfig, device_t &device);
vip_byteio_port_device *m_slot;
};
// device type definition
DECLARE_DEVICE_TYPE(VIP_BYTEIO_PORT, vip_byteio_port_device)
// slot devices
#include "vp620.h"
void vip_byteio_cards(device_slot_interface &device);
#endif // MAME_BUS_VIP_BYTEIO_H
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