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Diffstat (limited to 'src/devices/bus/vic20/exp.h')
-rw-r--r-- | src/devices/bus/vic20/exp.h | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/src/devices/bus/vic20/exp.h b/src/devices/bus/vic20/exp.h new file mode 100644 index 00000000000..8dfd840fa22 --- /dev/null +++ b/src/devices/bus/vic20/exp.h @@ -0,0 +1,172 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************** + + Commodore VIC-20 Expansion Port emulation + +********************************************************************** + + GND 1 A GND + CD0 2 B CA0 + CD1 3 C CA1 + CD2 4 D CA2 + CD3 5 E CA3 + CD4 6 F CA4 + CD5 7 H CA5 + CD6 8 J CA6 + CD7 9 K CA7 + _BLK1 10 L CA8 + _BLK2 11 M CA9 + _BLK3 12 N CA10 + _BLK5 13 P CA11 + _RAM1 14 R CA12 + _RAM2 15 S CA13 + _RAM3 16 T _I/O2 + VR/_W 17 U _I/O3 + CR/_W 18 V Sphi2 + _IRQ 19 W _NMI + N.C. 20 X _RES + +5V 21 Y N.C. + GND 22 Z GND + +**********************************************************************/ + +#pragma once + +#ifndef __VIC20_EXPANSION_SLOT__ +#define __VIC20_EXPANSION_SLOT__ + +#include "emu.h" + + + +//************************************************************************** +// CONSTANTS +//************************************************************************** + +#define VIC20_EXPANSION_SLOT_TAG "exp" + + + +//************************************************************************** +// INTERFACE CONFIGURATION MACROS +//************************************************************************** + +#define MCFG_VIC20_EXPANSION_SLOT_ADD(_tag, _clock, _slot_intf, _def_slot) \ + MCFG_DEVICE_ADD(_tag, VIC20_EXPANSION_SLOT, _clock) \ + MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, false) + +#define MCFG_VIC20_PASSTHRU_EXPANSION_SLOT_ADD(_tag) \ + MCFG_VIC20_EXPANSION_SLOT_ADD(_tag, 0, vic20_expansion_cards, NULL) \ + MCFG_VIC20_EXPANSION_SLOT_IRQ_CALLBACK(DEVWRITELINE(DEVICE_SELF_OWNER, vic20_expansion_slot_device, irq_w)) \ + MCFG_VIC20_EXPANSION_SLOT_NMI_CALLBACK(DEVWRITELINE(DEVICE_SELF_OWNER, vic20_expansion_slot_device, nmi_w)) \ + MCFG_VIC20_EXPANSION_SLOT_RES_CALLBACK(DEVWRITELINE(DEVICE_SELF_OWNER, vic20_expansion_slot_device, res_w)) + + +#define MCFG_VIC20_EXPANSION_SLOT_IRQ_CALLBACK(_write) \ + devcb = &vic20_expansion_slot_device::set_irq_wr_callback(*device, DEVCB_##_write); + +#define MCFG_VIC20_EXPANSION_SLOT_NMI_CALLBACK(_write) \ + devcb = &vic20_expansion_slot_device::set_nmi_wr_callback(*device, DEVCB_##_write); + +#define MCFG_VIC20_EXPANSION_SLOT_RES_CALLBACK(_write) \ + devcb = &vic20_expansion_slot_device::set_res_wr_callback(*device, DEVCB_##_write); + + + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +// ======================> vic20_expansion_slot_device + +class device_vic20_expansion_card_interface; + +class vic20_expansion_slot_device : public device_t, + public device_slot_interface, + public device_image_interface +{ +public: + // construction/destruction + vic20_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + template<class _Object> static devcb_base &set_irq_wr_callback(device_t &device, _Object object) { return downcast<vic20_expansion_slot_device &>(device).m_write_irq.set_callback(object); } + template<class _Object> static devcb_base &set_nmi_wr_callback(device_t &device, _Object object) { return downcast<vic20_expansion_slot_device &>(device).m_write_nmi.set_callback(object); } + template<class _Object> static devcb_base &set_res_wr_callback(device_t &device, _Object object) { return downcast<vic20_expansion_slot_device &>(device).m_write_res.set_callback(object); } + + // computer interface + UINT8 cd_r(address_space &space, offs_t offset, UINT8 data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3); + void cd_w(address_space &space, offs_t offset, UINT8 data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3); + + // cartridge interface + DECLARE_WRITE_LINE_MEMBER( irq_w ) { m_write_irq(state); } + DECLARE_WRITE_LINE_MEMBER( nmi_w ) { m_write_nmi(state); } + DECLARE_WRITE_LINE_MEMBER( res_w ) { m_write_res(state); } + +protected: + // device-level overrides + virtual void device_config_complete() { update_names(); } + virtual void device_start(); + virtual void device_reset(); + + // image-level overrides + virtual bool call_load(); + virtual bool call_softlist_load(software_list_device &swlist, const char *swname, const rom_entry *start_entry); + + virtual iodevice_t image_type() const { return IO_CARTSLOT; } + + virtual bool is_readable() const { return 1; } + virtual bool is_writeable() const { return 0; } + virtual bool is_creatable() const { return 0; } + virtual bool must_be_loaded() const { return 0; } + virtual bool is_reset_on_load() const { return 1; } + virtual const char *image_interface() const { return "vic1001_cart"; } + virtual const char *file_extensions() const { return "20,40,60,70,a0,b0,crt"; } + virtual const option_guide *create_option_guide() const { return NULL; } + + // slot interface overrides + virtual void get_default_card_software(std::string &result); + + devcb_write_line m_write_irq; + devcb_write_line m_write_nmi; + devcb_write_line m_write_res; + + device_vic20_expansion_card_interface *m_card; +}; + + +// ======================> device_vic20_expansion_card_interface + +// class representing interface-specific live vic20_expansion card +class device_vic20_expansion_card_interface : public device_slot_card_interface +{ + friend class vic20_expansion_slot_device; + +public: + // construction/destruction + device_vic20_expansion_card_interface(const machine_config &mconfig, device_t &device); + virtual ~device_vic20_expansion_card_interface(); + + virtual UINT8 vic20_cd_r(address_space &space, offs_t offset, UINT8 data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3) { return data; }; + virtual void vic20_cd_w(address_space &space, offs_t offset, UINT8 data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3) { }; + +protected: + optional_shared_ptr<UINT8> m_blk1; + optional_shared_ptr<UINT8> m_blk2; + optional_shared_ptr<UINT8> m_blk3; + optional_shared_ptr<UINT8> m_blk5; + optional_shared_ptr<UINT8> m_nvram; + + vic20_expansion_slot_device *m_slot; +}; + + +// device type definition +extern const device_type VIC20_EXPANSION_SLOT; + + +SLOT_INTERFACE_EXTERN( vic20_expansion_cards ); + + + +#endif |