///////////////////////////////////////////////////////////////////////// // $Id: vga.h,v 1.24 2003-03-02 23:59:11 cbothamy Exp $ ///////////////////////////////////////////////////////////////////////// // // Copyright (C) 2002 MandrakeSoft S.A. // // MandrakeSoft S.A. // 43, rue d'Aboukir // 75002 Paris - France // http://www.linux-mandrake.com/ // http://www.mandrakesoft.com/ // // This library is free software; you can redistribute it and/or // modify it under the terms of the GNU Lesser General Public // License as published by the Free Software Foundation; either // version 2 of the License, or (at your option) any later version. // // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public // License along with this library; if not, write to the Free Software // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA #if BX_SUPPORT_VBE #define VBE_DISPI_TOTAL_VIDEO_MEMORY_MB 4 #define VBE_DISPI_BANK_ADDRESS 0xA0000 #define VBE_DISPI_BANK_SIZE_KB 64 #define VBE_DISPI_MAX_XRES 1024 #define VBE_DISPI_MAX_YRES 768 #define VBE_DISPI_IOPORT_INDEX 0xFF80 #define VBE_DISPI_IOPORT_DATA 0xFF81 #define VBE_DISPI_INDEX_ID 0x0 #define VBE_DISPI_INDEX_XRES 0x1 #define VBE_DISPI_INDEX_YRES 0x2 #define VBE_DISPI_INDEX_BPP 0x3 #define VBE_DISPI_INDEX_ENABLE 0x4 #define VBE_DISPI_INDEX_BANK 0x5 #define VBE_DISPI_INDEX_VIRT_WIDTH 0x6 #define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7 #define VBE_DISPI_INDEX_X_OFFSET 0x8 #define VBE_DISPI_INDEX_Y_OFFSET 0x9 #define VBE_DISPI_ID0 0xB0C0 #define VBE_DISPI_ID1 0xB0C1 #define VBE_DISPI_BPP_8 0x0 #define VBE_DISPI_BPP_4 0x4 // The following is not support yet, but just for reference available. // #define VBE_DISPI_BPP_RGB565 0x1 // #define VBE_DISPI_BPP_RGB555 0x2 #define VBE_DISPI_DISABLED 0x00 #define VBE_DISPI_ENABLED 0x01 #define VBE_DISPI_LFB_PHYSICAL_ADDRESS 0xE0000000 #define VBE_DISPI_TOTAL_VIDEO_MEMORY_KB (VBE_DISPI_TOTAL_VIDEO_MEMORY_MB * 1024) #define VBE_DISPI_TOTAL_VIDEO_MEMORY_BYTES (VBE_DISPI_TOTAL_VIDEO_MEMORY_KB * 1024) #define BX_MAX_XRES VBE_DISPI_MAX_XRES #define BX_MAX_YRES VBE_DISPI_MAX_YRES #else #define BX_MAX_XRES 640 #define BX_MAX_YRES 480 #endif //BX_SUPPORT_VBE #define CGA_TEXT_ADDR(row, column) (0x18000 + ((row)*80 + (column))*2) #define X_TILESIZE 16 #define Y_TILESIZE 24 #define BX_NUM_X_TILES (BX_MAX_XRES /X_TILESIZE) #define BX_NUM_Y_TILES (BX_MAX_YRES /Y_TILESIZE) // Support varying number of rows of text. This used to // be limited to only 25 lines. #define BX_MAX_TEXT_LINES 260 #if BX_USE_VGA_SMF # define BX_VGA_SMF static # define BX_VGA_THIS theVga-> #else # define BX_VGA_SMF # define BX_VGA_THIS this-> #endif class bx_vga_c : public bx_vga_stub_c { public: bx_vga_c(void); ~bx_vga_c(void); virtual void init(void); virtual void reset(unsigned type); virtual Bit8u mem_read(Bit32u addr); // Note: either leave value of type Bit8u, or mask it when // used to 8 bits, in memory.cc virtual void mem_write(Bit32u addr, Bit8u value); virtual void trigger_timer(void *this_ptr); #if BX_SUPPORT_VBE BX_VGA_SMF Bit8u vbe_mem_read(Bit32u addr) BX_CPP_AttrRegparmN(1); BX_VGA_SMF void vbe_mem_write(Bit32u addr, Bit8u value) BX_CPP_AttrRegparmN(2); #endif virtual void redraw_area(unsigned x0, unsigned y0, unsigned width, unsigned height); virtual void set_update_interval (unsigned interval); virtual void get_text_snapshot(Bit8u **text_snapshot, unsigned *txHeight, unsigned *txWidth); virtual Bit8u get_actl_palette_idx(Bit8u index); private: static Bit32u read_handler(void *this_ptr, Bit32u address, unsigned io_len); static void write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len); static void write_handler_no_log(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len); #if BX_SUPPORT_VBE static Bit32u vbe_read_handler(void *this_ptr, Bit32u address, unsigned io_len); static void vbe_write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len); #endif struct { struct { bx_bool color_emulation; // 1=color emulation, base address = 3Dx // 0=mono emulation, base address = 3Bx bx_bool enable_ram; // enable CPU access to video memory if set Bit8u clock_select; // 0=25Mhz 1=28Mhz bx_bool select_high_bank; // when in odd/even modes, select // high 64k bank if set bx_bool horiz_sync_pol; // bit6: negative if set bx_bool vert_sync_pol; // bit7: negative if set // bit7,bit6 represent number of lines on display: // 0 = reserved // 1 = 400 lines // 2 = 350 lines // 3 - 480 lines } misc_output; struct { Bit8u address; Bit8u reg[0x19]; } CRTC; struct { bx_bool flip_flop; /* 0 = address, 1 = data-write */ unsigned address; /* register number */ bx_bool video_enabled; Bit8u palette_reg[16]; Bit8u overscan_color; Bit8u color_plane_enable; Bit8u horiz_pel_panning; Bit8u color_select; struct { bx_bool graphics_alpha; bx_bool display_type; bx_bool enable_line_graphics; bx_bool blink_intensity; bx_bool pixel_panning_compat; bx_bool pixel_clock_select; bx_bool internal_palette_size; } mode_ctrl; } attribute_ctrl; struct { Bit8u write_data_register; Bit8u write_data_cycle; /* 0, 1, 2 */ Bit8u read_data_register; Bit8u read_data_cycle; /* 0, 1, 2 */ Bit8u dac_state; struct { Bit8u red; Bit8u green; Bit8u blue; } data[256]; Bit8u mask; } pel; struct { Bit8u index; Bit8u set_reset; Bit8u enable_set_reset; Bit8u color_compare; Bit8u data_rotate; Bit8u raster_op; Bit8u read_map_select; Bit8u write_mode; bx_bool read_mode; bx_bool odd_even; bx_bool chain_odd_even; Bit8u shift_reg; bx_bool graphics_alpha; Bit8u memory_mapping; /* 0 = use A0000-BFFFF * 1 = use A0000-AFFFF EGA/VGA graphics modes * 2 = use B0000-B7FFF Monochrome modes * 3 = use B8000-BFFFF CGA modes */ Bit8u color_dont_care; Bit8u bitmask; Bit8u latch[4]; } graphics_ctrl; struct { Bit8u index; Bit8u map_mask; bx_bool map_mask_bit[4]; bx_bool reset1; bx_bool reset2; Bit8u reg1; Bit8u char_map_select; bx_bool extended_mem; bx_bool odd_even; bx_bool chain_four; } sequencer; bx_bool vga_mem_updated; unsigned x_tilesize; unsigned y_tilesize; unsigned scan_bits; bx_bool vga_tile_updated[BX_NUM_X_TILES][BX_NUM_Y_TILES]; Bit8u vga_memory[256 * 1024]; Bit8u text_snapshot[2 * 80 * BX_MAX_TEXT_LINES]; // current text snapshot unsigned horiz_tick; unsigned vert_tick; Bit8u rgb[3 * 256]; Bit8u tile[X_TILESIZE * Y_TILESIZE]; Bit16u charmap_address; #if BX_SUPPORT_VBE Bit8u vbe_memory[VBE_DISPI_TOTAL_VIDEO_MEMORY_BYTES]; Bit16u vbe_cur_dispi; Bit16u vbe_xres; Bit16u vbe_yres; Bit16u vbe_bpp; Bit16u vbe_bank; bx_bool vbe_enabled; Bit16u vbe_curindex; Bit32u vbe_visable_screen_size; // in bytes Bit16u vbe_offset_x; Bit16u vbe_offset_y; Bit16u vbe_virtual_xres; Bit16u vbe_virtual_yres; #endif } s; // state information #if !BX_USE_VGA_SMF Bit32u read(Bit32u address, unsigned io_len); void write(Bit32u address, Bit32u value, unsigned io_len, bx_bool no_log); #else void write(Bit32u address, Bit32u value, unsigned io_len, bx_bool no_log); #endif #if BX_SUPPORT_VBE #if !BX_USE_VGA_SMF Bit32u vbe_read(Bit32u address, unsigned io_len); void vbe_write(Bit32u address, Bit32u value, unsigned io_len, bx_bool no_log); #else void vbe_write(Bit32u address, Bit32u value, unsigned io_len, bx_bool no_log); #endif #endif int timer_id; public: static void timer_handler(void *); BX_VGA_SMF void timer(void); private: BX_VGA_SMF void update(void); BX_VGA_SMF void dump_status(void); BX_VGA_SMF void determine_screen_dimensions(unsigned *piHeight, unsigned *piWidth); };