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Diffstat (limited to 'src/devices/bus/comx35/exp.h')
-rw-r--r-- | src/devices/bus/comx35/exp.h | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/src/devices/bus/comx35/exp.h b/src/devices/bus/comx35/exp.h new file mode 100644 index 00000000000..df4f7fffb68 --- /dev/null +++ b/src/devices/bus/comx35/exp.h @@ -0,0 +1,145 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************** + + COMX-35 Expansion Slot emulation + +********************************************************************** + + GND 1 A GND + NC 2 B DS + +5V 3 C V+ + D0 4 D D1 + D2 5 E D3 + D4 6 F D5 + D6 7 H D7 + _DP 8 J Q + _CLEAR 9 K _MRD + TPA 10 L N0 + N1 11 M N2 + _RAS 12 N _INT + _WAIT 13 P CLOCK + SC1 14 R SC0 + _EF4 15 S _CASE + TPB 16 T _A15 + _MWR 17 U A14 + MA7 18 V _A14 + MA5 19 W MA6 + MA4 20 X MA3 + MA2 21 Y _EXTROM + MA1 22 Z MA0 + +**********************************************************************/ + +#pragma once + +#ifndef __COMX35_EXPANSION_SLOT__ +#define __COMX35_EXPANSION_SLOT__ + +#include "emu.h" + + + +//************************************************************************** +// CONSTANTS +//************************************************************************** + +#define COMX_EXPANSION_BUS_TAG "comxexp" + + + +//************************************************************************** +// INTERFACE CONFIGURATION MACROS +//************************************************************************** + +#define MCFG_COMX_EXPANSION_SLOT_ADD(_tag, _slot_intf, _def_slot) \ + MCFG_DEVICE_ADD(_tag, COMX_EXPANSION_SLOT, 0) \ + MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, false) + + +#define MCFG_COMX_EXPANSION_SLOT_IRQ_CALLBACK(_write) \ + devcb = &comx_expansion_slot_device::set_irq_wr_callback(*device, DEVCB_##_write); + + + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +// ======================> comx_expansion_slot_device + +class device_comx_expansion_card_interface; + +class comx_expansion_slot_device : public device_t, + public device_slot_interface +{ +public: + // construction/destruction + comx_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + virtual ~comx_expansion_slot_device() { } + + template<class _Object> static devcb_base &set_irq_wr_callback(device_t &device, _Object object) { return downcast<comx_expansion_slot_device &>(device).m_write_irq.set_callback(object); } + + UINT8 mrd_r(address_space &space, offs_t offset, int *extrom); + void mwr_w(address_space &space, offs_t offset, UINT8 data); + + UINT8 io_r(address_space &space, offs_t offset); + void io_w(address_space &space, offs_t offset, UINT8 data); + + DECLARE_READ_LINE_MEMBER( ef4_r ); + + DECLARE_WRITE_LINE_MEMBER( ds_w ); + DECLARE_WRITE_LINE_MEMBER( q_w ); + + DECLARE_WRITE_LINE_MEMBER( irq_w ) { m_write_irq(state); } + +protected: + // device-level overrides + virtual void device_start(); + + devcb_write_line m_write_irq; + + device_comx_expansion_card_interface *m_card; +}; + + +// ======================> device_comx_expansion_card_interface + +// class representing interface-specific live comx_expansion card +class device_comx_expansion_card_interface : public device_slot_card_interface +{ + friend class comx_expansion_slot_device; + +public: + // construction/destruction + device_comx_expansion_card_interface(const machine_config &mconfig, device_t &device); + virtual ~device_comx_expansion_card_interface() { } + +protected: + // signals + virtual int comx_ef4_r() { return CLEAR_LINE; } + virtual void comx_ds_w(int state) { m_ds = state; }; + virtual void comx_q_w(int state) { }; + + // memory access + virtual UINT8 comx_mrd_r(address_space &space, offs_t offset, int *extrom) { return 0; }; + virtual void comx_mwr_w(address_space &space, offs_t offset, UINT8 data) { }; + + // I/O access + virtual UINT8 comx_io_r(address_space &space, offs_t offset) { return 0; }; + virtual void comx_io_w(address_space &space, offs_t offset, UINT8 data) { }; + + comx_expansion_slot_device *m_slot; + + int m_ds; +}; + + +// device type definition +extern const device_type COMX_EXPANSION_SLOT; + + +SLOT_INTERFACE_EXTERN( comx_expansion_cards ); + + +#endif |