1b7b92ed8a
Update all related BIOS memory values and CRTC registers when loading fonts, fixing quirks in some textmode programs like Inertia Player. Based in part on a patch by h-a-l-9000. Improve support for MDA emulation in the vgaonly machine type, as it is the only way the video BIOS can make use of the 14-line alternate symbols. Be compatible by setting the INT 43h vector to the first half of the 8-line font table for standard text modes. Fixes a few obscure games and demos that rely on this BIOS behavior. Move VESA mode table and OEM string before font tables in the video ROM, which is a more compatible ordering and gives the data low address offsets that work around a bug in some programs such as the Abuse game and Molejo demo. Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3932
236 lines
7.9 KiB
C
236 lines
7.9 KiB
C
/*
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* Copyright (C) 2002-2015 The DOSBox Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "vga.h"
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#define S3_LFB_BASE 0xC0000000
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#define BIOSMEM_SEG 0x40
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#define BIOSMEM_INITIAL_MODE 0x10
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#define BIOSMEM_CURRENT_MODE 0x49
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#define BIOSMEM_NB_COLS 0x4A
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#define BIOSMEM_PAGE_SIZE 0x4C
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#define BIOSMEM_CURRENT_START 0x4E
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#define BIOSMEM_CURSOR_POS 0x50
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#define BIOSMEM_CURSOR_TYPE 0x60
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#define BIOSMEM_CURRENT_PAGE 0x62
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#define BIOSMEM_CRTC_ADDRESS 0x63
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#define BIOSMEM_CURRENT_MSR 0x65
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#define BIOSMEM_CURRENT_PAL 0x66
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#define BIOSMEM_NB_ROWS 0x84
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#define BIOSMEM_CHAR_HEIGHT 0x85
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#define BIOSMEM_VIDEO_CTL 0x87
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#define BIOSMEM_SWITCHES 0x88
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#define BIOSMEM_MODESET_CTL 0x89
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#define BIOSMEM_DCC_INDEX 0x8A
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#define BIOSMEM_CRTCPU_PAGE 0x8A
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#define BIOSMEM_VS_POINTER 0xA8
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/*
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*
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* VGA registers
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*
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*/
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#define VGAREG_ACTL_ADDRESS 0x3c0
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#define VGAREG_ACTL_WRITE_DATA 0x3c0
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#define VGAREG_ACTL_READ_DATA 0x3c1
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#define VGAREG_INPUT_STATUS 0x3c2
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#define VGAREG_WRITE_MISC_OUTPUT 0x3c2
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#define VGAREG_VIDEO_ENABLE 0x3c3
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#define VGAREG_SEQU_ADDRESS 0x3c4
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#define VGAREG_SEQU_DATA 0x3c5
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#define VGAREG_PEL_MASK 0x3c6
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#define VGAREG_DAC_STATE 0x3c7
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#define VGAREG_DAC_READ_ADDRESS 0x3c7
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#define VGAREG_DAC_WRITE_ADDRESS 0x3c8
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#define VGAREG_DAC_DATA 0x3c9
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#define VGAREG_READ_FEATURE_CTL 0x3ca
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#define VGAREG_READ_MISC_OUTPUT 0x3cc
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#define VGAREG_GRDC_ADDRESS 0x3ce
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#define VGAREG_GRDC_DATA 0x3cf
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#define VGAREG_MDA_CRTC_ADDRESS 0x3b4
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#define VGAREG_MDA_CRTC_DATA 0x3b5
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#define VGAREG_VGA_CRTC_ADDRESS 0x3d4
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#define VGAREG_VGA_CRTC_DATA 0x3d5
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#define VGAREG_MDA_WRITE_FEATURE_CTL 0x3ba
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#define VGAREG_VGA_WRITE_FEATURE_CTL 0x3da
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#define VGAREG_ACTL_RESET 0x3da
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#define VGAREG_TDY_RESET 0x3da
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#define VGAREG_TDY_ADDRESS 0x3da
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#define VGAREG_TDY_DATA 0x3de
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#define VGAREG_PCJR_DATA 0x3da
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#define VGAREG_MDA_MODECTL 0x3b8
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#define VGAREG_CGA_MODECTL 0x3d8
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#define VGAREG_CGA_PALETTE 0x3d9
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/* Video memory */
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#define VGAMEM_GRAPH 0xA000
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#define VGAMEM_CTEXT 0xB800
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#define VGAMEM_MTEXT 0xB000
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#define BIOS_NCOLS Bit16u ncols=real_readw(BIOSMEM_SEG,BIOSMEM_NB_COLS);
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#define BIOS_NROWS Bit16u nrows=(Bit16u)real_readb(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1;
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extern Bit8u int10_font_08[256 * 8];
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extern Bit8u int10_font_14[256 * 14];
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extern Bit8u int10_font_16[256 * 16];
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extern Bit8u int10_font_14_alternate[20 * 15 + 1];
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extern Bit8u int10_font_16_alternate[19 * 17 + 1];
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struct VideoModeBlock {
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Bit16u mode;
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VGAModes type;
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Bitu swidth, sheight;
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Bitu twidth, theight;
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Bitu cwidth, cheight;
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Bitu ptotal,pstart,plength;
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Bitu htotal,vtotal;
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Bitu hdispend,vdispend;
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Bitu special;
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};
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extern VideoModeBlock ModeList_VGA[];
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extern VideoModeBlock * CurMode;
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typedef struct {
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struct {
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RealPt font_8_first;
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RealPt font_8_second;
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RealPt font_14;
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RealPt font_16;
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RealPt font_14_alternate;
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RealPt font_16_alternate;
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RealPt static_state;
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RealPt video_save_pointers;
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RealPt video_parameter_table;
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RealPt video_save_pointer_table;
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RealPt video_dcc_table;
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RealPt oemstring;
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RealPt vesa_modes;
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RealPt pmode_interface;
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Bit16u pmode_interface_size;
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Bit16u pmode_interface_start;
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Bit16u pmode_interface_window;
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Bit16u pmode_interface_palette;
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Bit16u used;
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} rom;
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Bit16u vesa_setmode;
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bool vesa_nolfb;
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bool vesa_oldvbe;
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} Int10Data;
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extern Int10Data int10;
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static Bit8u CURSOR_POS_COL(Bit8u page) {
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return real_readb(BIOSMEM_SEG,BIOSMEM_CURSOR_POS+page*2);
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}
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static Bit8u CURSOR_POS_ROW(Bit8u page) {
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return real_readb(BIOSMEM_SEG,BIOSMEM_CURSOR_POS+page*2+1);
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}
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bool INT10_SetVideoMode(Bit16u mode);
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void INT10_ScrollWindow(Bit8u rul,Bit8u cul,Bit8u rlr,Bit8u clr,Bit8s nlines,Bit8u attr,Bit8u page);
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void INT10_SetActivePage(Bit8u page);
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void INT10_GetFuncStateInformation(PhysPt save);
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void INT10_SetCursorShape(Bit8u first,Bit8u last);
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void INT10_SetCursorPos(Bit8u row,Bit8u col,Bit8u page);
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void INT10_TeletypeOutput(Bit8u chr,Bit8u attr);
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void INT10_TeletypeOutputAttr(Bit8u chr,Bit8u attr,bool useattr);
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void INT10_ReadCharAttr(Bit16u * result,Bit8u page);
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void INT10_WriteChar(Bit8u chr,Bit8u attr,Bit8u page,Bit16u count,bool showattr);
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void INT10_WriteString(Bit8u row,Bit8u col,Bit8u flag,Bit8u attr,PhysPt string,Bit16u count,Bit8u page);
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/* Graphics Stuff */
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void INT10_PutPixel(Bit16u x,Bit16u y,Bit8u page,Bit8u color);
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void INT10_GetPixel(Bit16u x,Bit16u y,Bit8u page,Bit8u * color);
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/* Font Stuff */
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void INT10_LoadFont(PhysPt font,bool reload,Bitu count,Bitu offset,Bitu map,Bitu height);
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void INT10_ReloadFont(void);
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/* Palette Group */
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void INT10_SetBackgroundBorder(Bit8u val);
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void INT10_SetColorSelect(Bit8u val);
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void INT10_SetSinglePaletteRegister(Bit8u reg,Bit8u val);
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void INT10_SetOverscanBorderColor(Bit8u val);
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void INT10_SetAllPaletteRegisters(PhysPt data);
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void INT10_ToggleBlinkingBit(Bit8u state);
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void INT10_GetSinglePaletteRegister(Bit8u reg,Bit8u * val);
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void INT10_GetOverscanBorderColor(Bit8u * val);
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void INT10_GetAllPaletteRegisters(PhysPt data);
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void INT10_SetSingleDACRegister(Bit8u index,Bit8u red,Bit8u green,Bit8u blue);
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void INT10_GetSingleDACRegister(Bit8u index,Bit8u * red,Bit8u * green,Bit8u * blue);
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void INT10_SetDACBlock(Bit16u index,Bit16u count,PhysPt data);
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void INT10_GetDACBlock(Bit16u index,Bit16u count,PhysPt data);
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void INT10_SelectDACPage(Bit8u function,Bit8u mode);
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void INT10_GetDACPage(Bit8u* mode,Bit8u* page);
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void INT10_SetPelMask(Bit8u mask);
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void INT10_GetPelMask(Bit8u & mask);
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void INT10_PerformGrayScaleSumming(Bit16u start_reg,Bit16u count);
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/* Vesa Group */
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Bit8u VESA_GetSVGAInformation(Bit16u seg,Bit16u off);
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Bit8u VESA_GetSVGAModeInformation(Bit16u mode,Bit16u seg,Bit16u off);
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Bit8u VESA_SetSVGAMode(Bit16u mode);
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Bit8u VESA_GetSVGAMode(Bit16u & mode);
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Bit8u VESA_SetCPUWindow(Bit8u window,Bit8u address);
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Bit8u VESA_GetCPUWindow(Bit8u window,Bit16u & address);
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Bit8u VESA_ScanLineLength(Bit8u subcall, Bit16u val, Bit16u & bytes,Bit16u & pixels,Bit16u & lines);
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Bit8u VESA_SetDisplayStart(Bit16u x,Bit16u y);
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Bit8u VESA_GetDisplayStart(Bit16u & x,Bit16u & y);
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Bit8u VESA_SetPalette(PhysPt data,Bitu index,Bitu count);
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Bit8u VESA_GetPalette(PhysPt data,Bitu index,Bitu count);
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/* Sub Groups */
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void INT10_SetupRomMemory(void);
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void INT10_SetupRomMemoryChecksum(void);
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void INT10_SetupVESA(void);
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/* EGA RIL */
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RealPt INT10_EGA_RIL_GetVersionPt(void);
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void INT10_EGA_RIL_ReadRegister(Bit8u & bl, Bit16u dx);
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void INT10_EGA_RIL_WriteRegister(Bit8u & bl, Bit8u bh, Bit16u dx);
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void INT10_EGA_RIL_ReadRegisterRange(Bit8u ch, Bit8u cl, Bit16u dx, PhysPt dst);
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void INT10_EGA_RIL_WriteRegisterRange(Bit8u ch, Bit8u cl, Bit16u dx, PhysPt dst);
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void INT10_EGA_RIL_ReadRegisterSet(Bit16u cx, PhysPt tbl);
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void INT10_EGA_RIL_WriteRegisterSet(Bit16u cx, PhysPt tbl);
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/* Video State */
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Bitu INT10_VideoState_GetSize(Bitu state);
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bool INT10_VideoState_Save(Bitu state,RealPt buffer);
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bool INT10_VideoState_Restore(Bitu state,RealPt buffer);
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/* Video Parameter Tables */
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Bit16u INT10_SetupVideoParameterTable(PhysPt basepos);
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void INT10_SetupBasicVideoParameterTable(void);
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