233 lines
7.8 KiB
C++
233 lines
7.8 KiB
C++
/////////////////////////////////////////////////////////////////////////
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// $Id$
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2001-2012 The Bochs Project
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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//
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/////////////////////////////////////////////////////////////////////////
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#ifndef BX_IODEV_VGACORE_H
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#define BX_IODEV_VGACORE_H
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// Make colour
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#define MAKE_COLOUR(red, red_shiftfrom, red_shiftto, red_mask, \
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green, green_shiftfrom, green_shiftto, green_mask, \
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blue, blue_shiftfrom, blue_shiftto, blue_mask) \
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( \
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((((red_shiftto) > (red_shiftfrom)) ? \
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(red) << ((red_shiftto) - (red_shiftfrom)) : \
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(red) >> ((red_shiftfrom) - (red_shiftto))) & \
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(red_mask)) | \
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((((green_shiftto) > (green_shiftfrom)) ? \
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(green) << ((green_shiftto) - (green_shiftfrom)) : \
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(green) >> ((green_shiftfrom) - (green_shiftto))) & \
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(green_mask)) | \
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((((blue_shiftto) > (blue_shiftfrom)) ? \
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(blue) << ((blue_shiftto) - (blue_shiftfrom)) : \
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(blue) >> ((blue_shiftfrom) - (blue_shiftto))) & \
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(blue_mask)) \
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)
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#define X_TILESIZE 16
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#define Y_TILESIZE 24
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class bx_vgacore_c : public bx_vga_stub_c
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#if BX_SUPPORT_PCI
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, public bx_pci_device_stub_c
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#endif
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{
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public:
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bx_vgacore_c();
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virtual ~bx_vgacore_c();
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virtual void init(void);
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virtual void reset(unsigned type) {}
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static bx_bool mem_read_handler(bx_phy_address addr, unsigned len, void *data, void *param);
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static bx_bool mem_write_handler(bx_phy_address addr, unsigned len, void *data, void *param);
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virtual Bit8u mem_read(bx_phy_address addr);
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virtual void mem_write(bx_phy_address addr, Bit8u value);
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virtual void trigger_timer(void *this_ptr);
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virtual void set_override(bx_bool enabled);
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virtual void register_state(bx_list_c *parent);
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virtual void after_restore_state(void);
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#if BX_DEBUGGER
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virtual void debug_dump(void);
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#endif
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virtual void redraw_area(unsigned x0, unsigned y0,
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unsigned width, unsigned height);
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virtual int get_snapshot_mode(void);
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virtual void get_text_snapshot(Bit8u **text_snapshot, unsigned *txHeight,
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unsigned *txWidth);
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virtual Bit32u get_gfx_snapshot(Bit8u **snapshot_ptr, Bit8u **palette_ptr,
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unsigned *iHeight, unsigned *iWidth, unsigned *iDepth);
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virtual void init_vga_extension(void) {}
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static void timer_handler(void *);
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void timer(void);
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protected:
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void init_standard_vga(void);
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void init_gui(void);
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void init_iohandlers(bx_read_handler_t f_read, bx_write_handler_t f_write);
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void init_systemtimer(bx_timer_handler_t f_timer, param_event_handler f_param);
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static Bit32u read_handler(void *this_ptr, Bit32u address, unsigned io_len);
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static void write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len);
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Bit32u read(Bit32u address, unsigned io_len);
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void write(Bit32u address, Bit32u value, unsigned io_len, bx_bool no_log);
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Bit8u get_vga_pixel(Bit16u x, Bit16u y, Bit16u saddr, Bit16u lc, bx_bool bs, Bit8u **plane);
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bx_bool get_dac_palette(Bit8u **palette_ptr, Bit8u shift);
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void update(void);
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void determine_screen_dimensions(unsigned *piHeight, unsigned *piWidth);
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void calculate_retrace_timing(void);
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struct {
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struct {
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bx_bool color_emulation; // 1=color emulation, base address = 3Dx
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// 0=mono emulation, base address = 3Bx
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bx_bool enable_ram; // enable CPU access to video memory if set
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Bit8u clock_select; // 0=25Mhz 1=28Mhz
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bx_bool select_high_bank; // when in odd/even modes, select
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// high 64k bank if set
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bx_bool horiz_sync_pol; // bit6: negative if set
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bx_bool vert_sync_pol; // bit7: negative if set
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// bit7,bit6 represent number of lines on display:
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// 0 = reserved
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// 1 = 400 lines
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// 2 = 350 lines
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// 3 - 480 lines
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} misc_output;
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struct {
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Bit8u address;
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Bit8u reg[0x19];
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bx_bool write_protect;
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} CRTC;
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struct {
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bx_bool flip_flop; /* 0 = address, 1 = data-write */
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unsigned address; /* register number */
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bx_bool video_enabled;
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Bit8u palette_reg[16];
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Bit8u overscan_color;
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Bit8u color_plane_enable;
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Bit8u horiz_pel_panning;
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Bit8u color_select;
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struct {
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bx_bool graphics_alpha;
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bx_bool display_type;
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bx_bool enable_line_graphics;
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bx_bool blink_intensity;
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bx_bool pixel_panning_compat;
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bx_bool pixel_clock_select;
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bx_bool internal_palette_size;
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} mode_ctrl;
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} attribute_ctrl;
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struct {
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Bit8u write_data_register;
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Bit8u write_data_cycle; /* 0, 1, 2 */
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Bit8u read_data_register;
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Bit8u read_data_cycle; /* 0, 1, 2 */
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Bit8u dac_state;
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struct {
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Bit8u red;
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Bit8u green;
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Bit8u blue;
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} data[256];
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Bit8u mask;
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} pel;
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struct {
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Bit8u index;
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Bit8u set_reset;
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Bit8u enable_set_reset;
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Bit8u color_compare;
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Bit8u data_rotate;
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Bit8u raster_op;
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Bit8u read_map_select;
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Bit8u write_mode;
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bx_bool read_mode;
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bx_bool odd_even;
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bx_bool chain_odd_even;
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Bit8u shift_reg;
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bx_bool graphics_alpha;
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Bit8u memory_mapping; /* 0 = use A0000-BFFFF
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* 1 = use A0000-AFFFF EGA/VGA graphics modes
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* 2 = use B0000-B7FFF Monochrome modes
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* 3 = use B8000-BFFFF CGA modes
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*/
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Bit8u color_dont_care;
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Bit8u bitmask;
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Bit8u latch[4];
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} graphics_ctrl;
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struct {
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Bit8u index;
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Bit8u map_mask;
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bx_bool reset1;
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bx_bool reset2;
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Bit8u reg1;
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Bit8u char_map_select;
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bx_bool extended_mem;
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bx_bool odd_even;
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bx_bool chain_four;
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} sequencer;
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bx_bool vga_enabled;
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bx_bool vga_mem_updated;
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unsigned line_offset;
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unsigned line_compare;
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unsigned vertical_display_end;
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unsigned blink_counter;
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bx_bool *vga_tile_updated;
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Bit8u *memory;
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Bit32u memsize;
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Bit8u text_snapshot[128 * 1024]; // current text snapshot
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Bit8u tile[X_TILESIZE * Y_TILESIZE * 4]; /**< Currently allocates the tile as large as needed. */
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Bit16u charmap_address;
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bx_bool x_dotclockdiv2;
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bx_bool y_doublescan;
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// h/v retrace timing
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Bit32u htotal_usec;
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Bit32u vtotal_usec;
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// shift values for extensions
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Bit8u plane_shift;
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Bit32u plane_offset;
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Bit8u dac_shift;
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// last active resolution and bpp
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Bit16u last_xres;
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Bit16u last_yres;
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Bit8u last_bpp;
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Bit8u last_msl;
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// maximum resolution and number of tiles
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Bit16u max_xres;
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Bit16u max_yres;
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Bit16u num_x_tiles;
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Bit16u num_y_tiles;
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} s; // state information
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int timer_id;
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bx_bool extension_init;
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bx_bool pci_enabled;
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};
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#endif
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