/********************************************************************** Intelligent Designs NICK emulation Copyright MESS Team. Visit http://mamedev.org for licensing and usage restrictions. **********************************************************************/ #pragma once #ifndef __NICK__ #define __NICK__ #include "emu.h" #include "machine/rescap.h" #include "video/resnet.h" ///************************************************************************* // INTERFACE CONFIGURATION MACROS ///************************************************************************* #define MCFG_NICK_ADD(_tag, _screen_tag, _clock) \ MCFG_SCREEN_ADD(_screen_tag, RASTER) \ MCFG_SCREEN_REFRESH_RATE(50) \ MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) \ MCFG_SCREEN_SIZE(ENTERPRISE_SCREEN_WIDTH, ENTERPRISE_SCREEN_HEIGHT) \ MCFG_SCREEN_VISIBLE_AREA(0, ENTERPRISE_SCREEN_WIDTH-1, 0, ENTERPRISE_SCREEN_HEIGHT-1) \ MCFG_SCREEN_UPDATE_DEVICE(_tag, nick_device, screen_update) \ MCFG_DEVICE_ADD(_tag, NICK, _clock) \ MCFG_VIDEO_SET_SCREEN(_screen_tag) #define MCFG_NICK_VIRQ_CALLBACK(_write) \ devcb = &nick_device::set_virq_wr_callback(*device, DEVCB_##_write); /* there are 64us per line, although in reality about 50 are visible. */ #define ENTERPRISE_SCREEN_WIDTH (50*16) /* there are 312 lines per screen, although in reality about 35*8 are visible */ #define ENTERPRISE_SCREEN_HEIGHT (35*8) ///************************************************************************* // TYPE DEFINITIONS ///************************************************************************* /* Nick executes a Display list, in the form of a list of Line Parameter Tables, this is the form of the data */ struct LPT_ENTRY { UINT8 SC; /* scanlines in this modeline (two's complement) */ UINT8 MB; /* the MODEBYTE (defines video display mode) */ UINT8 LM; /* left margin etc */ UINT8 RM; /* right margin etc */ UINT8 LD1L; /* (a7..a0) of line data pointer LD1 */ UINT8 LD1H; /* (a8..a15) of line data pointer LD1 */ UINT8 LD2L; /* (a7..a0) of line data pointer LD2 */ UINT8 LD2H; /* (a8..a15) of line data pointer LD2 */ UINT8 COL[8]; /* COL0..COL7 */ }; // ======================> nick_device class nick_device : public device_t, public device_memory_interface, public device_video_interface { public: // construction/destruction nick_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); template static devcb_base &set_virq_wr_callback(device_t &device, _Object object) { return downcast(device).m_write_virq.set_callback(object); } virtual DECLARE_ADDRESS_MAP(vram_map, 8); virtual DECLARE_ADDRESS_MAP(vio_map, 8); UINT32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect); protected: // device-level overrides virtual void device_start(); virtual void device_reset(); virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr); // device_memory_interface overrides virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const; DECLARE_READ8_MEMBER( vram_r ); DECLARE_WRITE8_MEMBER( vram_w ); DECLARE_WRITE8_MEMBER( fixbias_w ); DECLARE_WRITE8_MEMBER( border_w ); DECLARE_WRITE8_MEMBER( lpl_w ); DECLARE_WRITE8_MEMBER( lph_w ); address_space_config m_space_config; private: devcb_write_line m_write_virq; void initialize_palette(); void write_pixel(int ci); void calc_visible_clocks(int width); void init(); void write_border(int clocks); void do_left_margin(); void do_right_margin(); int get_color_index(int pen_index); void write_pixels2color(UINT8 pen0, UINT8 pen1, UINT8 data_byte); void write_pixels2color_lpixel(UINT8 pen0, UINT8 pen1, UINT8 data_byte); void write_pixels(UINT8 data_byte, UINT8 char_idx); void write_pixels_lpixel(UINT8 data_byte, UINT8 char_idx); void do_pixel(int clocks_visible); void do_lpixel(int clocks_visible); void do_attr(int clocks_visible); void do_ch256(int clocks_visible); void do_ch128(int clocks_visible); void do_ch64(int clocks_visible); void do_display(); void update_lpt(); void reload_lpt(); void do_line(); /* horizontal position */ UINT8 horizontal_clock; /* current scanline within LPT */ UINT8 m_scanline_count; UINT8 m_FIXBIAS; UINT8 m_BORDER; UINT8 m_LPL; UINT8 m_LPH; UINT16 m_LD1; UINT16 m_LD2; LPT_ENTRY m_LPT; UINT32 *m_dest; int m_dest_pos; int m_dest_max_pos; UINT8 m_reg[4]; /* first clock visible on left hand side */ int m_first_visible_clock; /* first clock visible on right hand side */ int m_last_visible_clock; /* given a bit pattern, this will get the pen index */ UINT8 m_pen_idx_4col[256]; /* given a bit pattern, this will get the pen index */ UINT8 m_pen_idx_16col[256]; int m_virq; bitmap_rgb32 m_bitmap; rgb_t m_palette[256]; emu_timer *m_timer_scanline; }; // device type definition extern const device_type NICK; #endif