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Diffstat (limited to 'src/devices/bus/c64/exp.h')
-rw-r--r-- | src/devices/bus/c64/exp.h | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/src/devices/bus/c64/exp.h b/src/devices/bus/c64/exp.h new file mode 100644 index 00000000000..8ece3920e82 --- /dev/null +++ b/src/devices/bus/c64/exp.h @@ -0,0 +1,202 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************** + + Commodore 64 Expansion Port emulation + +********************************************************************** + + GND 1 A GND + +5V 2 B _ROMH + +5V 3 C _RESET + _IRQ 4 D _NMI + _CR/W 5 E Sphi2 + DOTCLK 6 F CA15 + _I/O1 7 H CA14 + _GAME 8 J CA13 + _EXROM 9 K CA12 + _I/O2 10 L CA11 + _ROML 11 M CA10 + BA 12 N CA9 + _DMA 13 P CA8 + CD7 14 R CA7 + CD6 15 S CA6 + CD5 16 T CA5 + CD4 17 U CA4 + CD3 18 V CA3 + CD2 19 W CA2 + CD1 20 X CA1 + CD0 21 Y CA0 + GND 22 Z GND + +**********************************************************************/ + +#pragma once + +#ifndef __C64_EXPANSION_SLOT__ +#define __C64_EXPANSION_SLOT__ + +#include "emu.h" +#include "formats/cbm_crt.h" + + + +//************************************************************************** +// CONSTANTS +//************************************************************************** + +#define C64_EXPANSION_SLOT_TAG "exp" + + + +//************************************************************************** +// INTERFACE CONFIGURATION MACROS +//************************************************************************** + +#define MCFG_C64_EXPANSION_SLOT_ADD(_tag, _clock, _slot_intf, _def_slot) \ + MCFG_DEVICE_ADD(_tag, C64_EXPANSION_SLOT, _clock) \ + MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, false) + +#define MCFG_C64_PASSTHRU_EXPANSION_SLOT_ADD() \ + MCFG_C64_EXPANSION_SLOT_ADD(C64_EXPANSION_SLOT_TAG, 0, c64_expansion_cards, NULL) \ + MCFG_C64_EXPANSION_SLOT_IRQ_CALLBACK(DEVWRITELINE(DEVICE_SELF_OWNER, c64_expansion_slot_device, irq_w)) \ + MCFG_C64_EXPANSION_SLOT_NMI_CALLBACK(DEVWRITELINE(DEVICE_SELF_OWNER, c64_expansion_slot_device, nmi_w)) \ + MCFG_C64_EXPANSION_SLOT_RESET_CALLBACK(DEVWRITELINE(DEVICE_SELF_OWNER, c64_expansion_slot_device, reset_w)) \ + MCFG_C64_EXPANSION_SLOT_CD_INPUT_CALLBACK(DEVREAD8(DEVICE_SELF_OWNER, c64_expansion_slot_device, dma_cd_r)) \ + MCFG_C64_EXPANSION_SLOT_CD_OUTPUT_CALLBACK(DEVWRITE8(DEVICE_SELF_OWNER, c64_expansion_slot_device, dma_cd_w)) \ + MCFG_C64_EXPANSION_SLOT_DMA_CALLBACK(DEVWRITELINE(DEVICE_SELF_OWNER, c64_expansion_slot_device, dma_w)) + + +#define MCFG_C64_EXPANSION_SLOT_IRQ_CALLBACK(_write) \ + devcb = &c64_expansion_slot_device::set_irq_wr_callback(*device, DEVCB_##_write); + +#define MCFG_C64_EXPANSION_SLOT_NMI_CALLBACK(_write) \ + devcb = &c64_expansion_slot_device::set_nmi_wr_callback(*device, DEVCB_##_write); + +#define MCFG_C64_EXPANSION_SLOT_RESET_CALLBACK(_write) \ + devcb = &c64_expansion_slot_device::set_reset_wr_callback(*device, DEVCB_##_write); + +#define MCFG_C64_EXPANSION_SLOT_CD_INPUT_CALLBACK(_read) \ + devcb = &c64_expansion_slot_device::set_cd_rd_callback(*device, DEVCB_##_read); + +#define MCFG_C64_EXPANSION_SLOT_CD_OUTPUT_CALLBACK(_write) \ + devcb = &c64_expansion_slot_device::set_cd_wr_callback(*device, DEVCB_##_write); + +#define MCFG_C64_EXPANSION_SLOT_DMA_CALLBACK(_write) \ + devcb = &c64_expansion_slot_device::set_dma_wr_callback(*device, DEVCB_##_write); + + + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +// ======================> c64_expansion_slot_device + +class device_c64_expansion_card_interface; + +class c64_expansion_slot_device : public device_t, + public device_slot_interface, + public device_image_interface +{ +public: + // construction/destruction + c64_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<c64_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<c64_expansion_slot_device &>(device).m_write_nmi.set_callback(object); } + template<class _Object> static devcb_base &set_reset_wr_callback(device_t &device, _Object object) { return downcast<c64_expansion_slot_device &>(device).m_write_reset.set_callback(object); } + template<class _Object> static devcb_base &set_cd_rd_callback(device_t &device, _Object object) { return downcast<c64_expansion_slot_device &>(device).m_read_dma_cd.set_callback(object); } + template<class _Object> static devcb_base &set_cd_wr_callback(device_t &device, _Object object) { return downcast<c64_expansion_slot_device &>(device).m_write_dma_cd.set_callback(object); } + template<class _Object> static devcb_base &set_dma_wr_callback(device_t &device, _Object object) { return downcast<c64_expansion_slot_device &>(device).m_write_dma.set_callback(object); } + + // computer interface + UINT8 cd_r(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2); + void cd_w(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2); + int game_r(offs_t offset, int sphi2, int ba, int rw, int hiram); + int exrom_r(offs_t offset, int sphi2, int ba, int rw, int hiram); + + // cartridge interface + DECLARE_READ8_MEMBER( dma_cd_r ) { return m_read_dma_cd(offset); } + DECLARE_WRITE8_MEMBER( dma_cd_w ) { m_write_dma_cd(offset, data); } + DECLARE_WRITE_LINE_MEMBER( irq_w ) { m_write_irq(state); } + DECLARE_WRITE_LINE_MEMBER( nmi_w ) { m_write_nmi(state); } + DECLARE_WRITE_LINE_MEMBER( dma_w ) { m_write_dma(state); } + DECLARE_WRITE_LINE_MEMBER( reset_w ) { m_write_reset(state); } + int phi2() { return clock(); } + int dotclock() { return phi2() * 8; } + int hiram() { return m_hiram; } + +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 "c64_cart,vic10_cart"; } + virtual const char *file_extensions() const { return "80,a0,e0,crt"; } + virtual const option_guide *create_option_guide() const { return NULL; } + + // slot interface overrides + virtual void get_default_card_software(std::string &result); + + devcb_read8 m_read_dma_cd; + devcb_write8 m_write_dma_cd; + devcb_write_line m_write_irq; + devcb_write_line m_write_nmi; + devcb_write_line m_write_dma; + devcb_write_line m_write_reset; + + device_c64_expansion_card_interface *m_card; + + int m_hiram; +}; + + +// ======================> device_c64_expansion_card_interface + +class device_c64_expansion_card_interface : public device_slot_card_interface +{ + friend class c64_expansion_slot_device; + +public: + // construction/destruction + device_c64_expansion_card_interface(const machine_config &mconfig, device_t &device); + virtual ~device_c64_expansion_card_interface(); + + virtual UINT8 c64_cd_r(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2) { return data; }; + virtual void c64_cd_w(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2) { }; + virtual int c64_game_r(offs_t offset, int sphi2, int ba, int rw) { return m_game; } + virtual int c64_exrom_r(offs_t offset, int sphi2, int ba, int rw) { return m_exrom; } + +protected: + optional_shared_ptr<UINT8> m_roml; + optional_shared_ptr<UINT8> m_romh; + optional_shared_ptr<UINT8> m_nvram; + + int m_game; + int m_exrom; + + c64_expansion_slot_device *m_slot; +}; + + +// device type definition +extern const device_type C64_EXPANSION_SLOT; + +SLOT_INTERFACE_EXTERN( c64_expansion_cards ); + + + +#endif |