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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Intel Multibus I/O Expansion Bus IEEE-P959 (iSBX) emulation
**********************************************************************
+12V 1 2 -12V
GND 3 4 +5V
RESET 5 6 MCLK
MA2 7 8 MPST/
MA1 9 10 reserved
MA0 11 12 MINTR1
/IOWRT 13 14 MINTR0
/IORD 15 16 MWAIT/
GND 17 18 +5V
MD7 19 20 MCS1/
MD6 21 22 MCS0/
MD5 23 24 reserved
MD4 25 26 TDMA
MD3 27 28 OPT1
MD2 29 30 OPT0
MD1 31 32 MDACK/
MD0 33 34 MDRQT
GND 35 36 +5V
MDE 37 38 MDF
MDC 39 40 MDD
MDA 41 42 MDB
MD8 43 44 MD9
**********************************************************************/
#ifndef MAME_BUS_ISBX_ISBX_SLOT_H
#define MAME_BUS_ISBX_ISBX_SLOT_H
#pragma once
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> device_isbx_card_interface
class isbx_slot_device;
class device_isbx_card_interface : public device_interface
{
public:
virtual uint8_t mcs0_r(offs_t offset) { return 0xff; }
virtual void mcs0_w(offs_t offset, uint8_t data) { }
virtual uint8_t mcs1_r(offs_t offset) { return 0xff; }
virtual void mcs1_w(offs_t offset, uint8_t data) { }
virtual uint8_t mdack_r(offs_t offset) { return 0xff; }
virtual void mdack_w(offs_t offset, uint8_t data) { }
virtual int opt0_r() { return 1; }
virtual void opt0_w(int state) { }
virtual int opt1_r() { return 1; }
virtual void opt1_w(int state) { }
virtual void tdma_w(int state) { }
virtual void mclk_w(int state) { }
protected:
// construction/destruction
device_isbx_card_interface(const machine_config &mconfig, device_t &device);
isbx_slot_device *m_slot;
};
// ======================> isbx_slot_device
class isbx_slot_device : public device_t, public device_single_card_slot_interface<device_isbx_card_interface>
{
public:
// construction/destruction
template <typename T>
isbx_slot_device(machine_config const &mconfig, char const *tag, device_t *owner, uint32_t clock, T &&opts, char const *dflt)
: isbx_slot_device(mconfig, tag, owner, clock)
{
option_reset();
opts(*this);
set_default_option(dflt);
set_fixed(false);
}
isbx_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
auto mintr0() { return m_write_mintr0.bind(); }
auto mintr1() { return m_write_mintr1.bind(); }
auto mdrqt() { return m_write_mdrqt.bind(); }
auto mwait() { return m_write_mwait.bind(); }
// computer interface
uint8_t mcs0_r(offs_t offset) { return m_card ? m_card->mcs0_r(offset) : 0xff; }
void mcs0_w(offs_t offset, uint8_t data) { if (m_card) m_card->mcs0_w(offset, data); }
uint8_t mcs1_r(offs_t offset) { return m_card ? m_card->mcs1_r(offset) : 0xff; }
void mcs1_w(offs_t offset, uint8_t data) { if (m_card) m_card->mcs1_w(offset, data); }
uint8_t mdack_r(offs_t offset) { return m_card ? m_card->mdack_r(offset) : 0xff; }
void mdack_w(offs_t offset, uint8_t data) { if (m_card) m_card->mdack_w(offset, data); }
int mpst_r() { return m_card == nullptr; }
int opt0_r() { return m_card ? m_card->opt0_r() : 1; }
void opt0_w(int state) { if (m_card) m_card->opt0_w(state); }
int opt1_r() { return m_card ? m_card->opt1_r() : 1; }
void opt1_w(int state) { if (m_card) m_card->opt1_w(state); }
void tdma_w(int state) { if (m_card) m_card->tdma_w(state); }
void mclk_w(int state) { if (m_card) m_card->mclk_w(state); }
// card interface
void mintr0_w(int state) { m_write_mintr0(state); }
void mintr1_w(int state) { m_write_mintr1(state); }
void mdrqt_w(int state) { m_write_mdrqt(state); }
void mwait_w(int state) { m_write_mwait(state); }
protected:
// device-level overrides
virtual void device_start() override ATTR_COLD;
devcb_write_line m_write_mintr0;
devcb_write_line m_write_mintr1;
devcb_write_line m_write_mdrqt;
devcb_write_line m_write_mwait;
device_isbx_card_interface *m_card;
};
// device type definition
DECLARE_DEVICE_TYPE(ISBX_SLOT, isbx_slot_device)
void isbx_cards(device_slot_interface &device);
#endif // MAME_BUS_ISBX_ISBX_SLOT_H
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