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Diffstat (limited to 'src/mess/machine/plus4exp.h')
-rw-r--r-- | src/mess/machine/plus4exp.h | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/src/mess/machine/plus4exp.h b/src/mess/machine/plus4exp.h new file mode 100644 index 00000000000..056a0b0516f --- /dev/null +++ b/src/mess/machine/plus4exp.h @@ -0,0 +1,197 @@ +/********************************************************************** + + Commodore Plus/4 Expansion Port emulation + + Copyright MESS Team. + Visit http://mamedev.org for licensing and usage restrictions. + +********************************************************************** + + GND 1 A GND + +5V 2 B C1 LOW + +5V 3 C _BRESET + _IRQ 4 D _RAS + R/_W 5 E phi0 + C1 HIGH 6 F A15 + C2 LOW 7 H A14 + C2 HIGH 8 J A13 + _CS1 9 K A12 + _CS0 10 L A11 + _CAS 11 M A10 + MUX 12 N A9 + BA 13 P A8 + D7 14 R A7 + D6 15 S A6 + D5 16 T A5 + D4 17 U A4 + D3 18 V A3 + D2 19 W A2 + D1 20 X A1 + D0 21 Y A0 + AEC 22 Z N.C. (RAMEN) + EXT AUDIO 23 AA N.C. + phi2 24 BB N.C. + GND 25 CC GND + +**********************************************************************/ + +#pragma once + +#ifndef __PLUS4_EXPANSION_SLOT__ +#define __PLUS4_EXPANSION_SLOT__ + +#include "emu.h" + + + +//************************************************************************** +// CONSTANTS +//************************************************************************** + +#define PLUS4_EXPANSION_SLOT_TAG "exp" + + + +//************************************************************************** +// INTERFACE CONFIGURATION MACROS +//************************************************************************** + +#define PLUS4_EXPANSION_INTERFACE(_name) \ + const plus4_expansion_slot_interface (_name) = + + +#define MCFG_PLUS4_EXPANSION_SLOT_ADD(_tag, _clock, _config, _slot_intf, _def_slot, _def_inp) \ + MCFG_DEVICE_ADD(_tag, PLUS4_EXPANSION_SLOT, _clock) \ + MCFG_DEVICE_CONFIG(_config) \ + MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, _def_inp, false) + + + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +// ======================> plus4_expansion_slot_interface + +struct plus4_expansion_slot_interface +{ + devcb_read8 m_in_dma_cd_cb; + devcb_write8 m_out_dma_cd_cb; + devcb_write_line m_out_irq_cb; + devcb_write_line m_out_aec_cb; +}; + + +// ======================> plus4_expansion_slot_device + +class device_plus4_expansion_card_interface; + +class plus4_expansion_slot_device : public device_t, + public plus4_expansion_slot_interface, + public device_slot_interface, + public device_image_interface +{ +public: + // construction/destruction + plus4_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + virtual ~plus4_expansion_slot_device(); + + // computer interface + UINT8 cd_r(address_space &space, offs_t offset, int ba, int cs0, int c1l, int c2l, int cs1, int c1h, int c2h); + void cd_w(address_space &space, offs_t offset, UINT8 data, int ba, int cs0, int c1l, int c2l, int cs1, int c1h, int c2h); + UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); + DECLARE_WRITE_LINE_MEMBER( breset_w ); + + // cartridge interface + UINT8 dma_cd_r(offs_t offset); + void dma_cd_w(offs_t offset, UINT8 data); + DECLARE_WRITE_LINE_MEMBER( irq_w ); + DECLARE_WRITE_LINE_MEMBER( aec_w ); + int phi2(); + int dotclock(); + +protected: + // device-level overrides + virtual void device_config_complete(); + virtual void device_start(); + virtual void device_reset(); + + // image-level overrides + virtual bool call_load(); + virtual bool call_softlist_load(char *swlist, char *swname, 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 "plus4_cart"; } + virtual const char *file_extensions() const { return "rom,bin"; } + virtual const option_guide *create_option_guide() const { return NULL; } + + // slot interface overrides + virtual const char * get_default_card_software(const machine_config &config, emu_options &options); + + devcb_resolved_read8 m_in_dma_cd_func; + devcb_resolved_write8 m_out_dma_cd_func; + devcb_resolved_write_line m_out_irq_func; + devcb_resolved_write_line m_out_aec_func; + + device_plus4_expansion_card_interface *m_cart; +}; + + +// ======================> device_plus4_expansion_card_interface + +class device_plus4_expansion_card_interface : public device_slot_card_interface +{ + friend class plus4_expansion_slot_device; + +public: + // construction/destruction + device_plus4_expansion_card_interface(const machine_config &mconfig, device_t &device); + virtual ~device_plus4_expansion_card_interface(); + + // initialization + virtual UINT8* plus4_c1l_pointer(running_machine &machine, size_t size); + virtual UINT8* plus4_c1h_pointer(running_machine &machine, size_t size); + virtual UINT8* plus4_c2l_pointer(running_machine &machine, size_t size); + virtual UINT8* plus4_c2h_pointer(running_machine &machine, size_t size); + virtual UINT8* plus4_ram_pointer(running_machine &machine, size_t size); + virtual UINT8* plus4_nvram_pointer(running_machine &machine, size_t size); + + // runtime + virtual UINT8 plus4_cd_r(address_space &space, offs_t offset, int ba, int cs0, int c1l, int c2l, int cs1, int c1h, int c2h) { return 0; }; + virtual void plus4_cd_w(address_space &space, offs_t offset, UINT8 data, int ba, int cs0, int c1l, int c2l, int cs1, int c1h, int c2h) { }; + virtual UINT32 plus4_screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { return 0; } + virtual void plus4_breset_w(int state) { }; + +protected: + plus4_expansion_slot_device *m_slot; + + UINT8 *m_c1l; + UINT8 *m_c1h; + UINT8 *m_c2l; + UINT8 *m_c2h; + UINT8 *m_ram; + UINT8 *m_nvram; + + size_t m_nvram_size; + + size_t m_c1l_mask; + size_t m_c1h_mask; + size_t m_c2l_mask; + size_t m_c2h_mask; + size_t m_ram_mask; + size_t m_nvram_mask; +}; + + +// device type definition +extern const device_type PLUS4_EXPANSION_SLOT; + + + +#endif |