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79e15ef30c
freebsd-dev/usr.bin/doscmd/video.h
Thomas Gellekum 86c393fc09 - Add some more x86 instructions to emulate, 
- emulate VGA read mode 0,
- emulate VGA write mode 1,
- minor cleanup.

Protel's Easytrax, a free PCB layout program, almost runs now; there are
still some problems with the keyboard emulation, but the graphics are fine
(albeit a bit slow).
2001-07-30 12:03:38 +00:00

378 lines
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/*
* Copyright (c) 1992, 1993, 1996
* Berkeley Software Design, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Berkeley Software
* Design, Inc.
*
* THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* BSDI video.h,v 2.2 1996/04/08 19:33:12 bostic Exp
*
* $FreeBSD$
*/
/*
* The VGA CRT Controller
*/
extern u_int8_t VGA_CRTC[];
/* CRTC registers
We use the VGA register functions and don't care about the MDA. We also
leave out the undocumented registers at 0x22, 0x24, 0x3?. */
#define CRTC_HorzTotal 0x00
#define CRTC_HorzDispEnd 0x01
#define CRTC_StartHorzBlank 0x02
#define CRTC_EndHorzBlank 0x03
#define CRTC_StartHorzRetrace 0x04
#define CRTC_EndHorzRetrace 0x05
#define CRTC_VertTotal 0x06
#define CRTC_Overflow 0x07
#define CRTC_ResetRowScan 0x08
#define CRTC_MaxScanLine 0x09
#define CRTC_CursStart 0x0a
#define CRTC_CursEnd 0x0b
#define CRTC_StartAddrHi 0x0c
#define CRTC_StartAddrLo 0x0d
#define CRTC_CurLocHi 0x0e
#define CRTC_CurLocLo 0x0f
#define CRTC_StartVertRetrace 0x10
#define CRTC_EndVertRetrace 0x11
#define CRTC_VertDispEnd 0x12
#define CRTC_Offset 0x13
#define CRTC_UnderlineLoc 0x14
#define CRTC_StartVertBlank 0x15
#define CRTC_EndVertBlank 0x16
#define CRTC_ModeCtrl 0x17
#define CRTC_LineCompare 0x18
#define CRTC_Size 0x19
/* Port addresses for the CRTC
The registers are read by
OUT index_port, reg_nr
IN data_port, res
They are written by
OUT index_port, reg_nr
OUT data_port, value
*/
#define CRTC_IndexPortColor 0x03d4 /* CRTC Address Register (Color) */
#define CRTC_DataPortColor 0x03d5 /* CRTC Data Register (Color) */
#define CRTC_IndexPortMono 0x03b4 /* CRTC Address Register (Mono) */
#define CRTC_DataPortMono 0x03b5 /* CRTC Data Register (Mono) */
/*
* VGA Attribute Controller
*/
extern u_int8_t VGA_ATC[];
/* ATC registers
The palette registers are here for completeness. We'll always use a
separate array 'palette[]' to access them in our code. */
#define ATC_Palette0 0x00
#define ATC_Palette1 0x01
#define ATC_Palette2 0x02
#define ATC_Palette3 0x03
#define ATC_Palette4 0x04
#define ATC_Palette5 0x05
#define ATC_Palette6 0x06
#define ATC_Palette7 0x07
#define ATC_Palette8 0x08
#define ATC_Palette9 0x09
#define ATC_PaletteA 0x0a
#define ATC_PaletteB 0x0b
#define ATC_PaletteC 0x0c
#define ATC_PaletteD 0x0d
#define ATC_PaletteE 0x0e
#define ATC_PaletteF 0x0f
#define ATC_ModeCtrl 0x10
#define ATC_OverscanColor 0x11
#define ATC_ColorPlaneEnable 0x12
#define ATC_HorzPixelPanning 0x13
#define ATC_ColorSelect 0x14
#define ATC_Size 0x15
/* Port addresses for the ATC
The ATC has a combined index/data port at 0x03c0. To quote from Ralf
Brown's ports list: ``Every write access to this register will toggle an
internal index/data selection flipflop, so that consecutive writes to index
& data is possible through this port. To get a defined start condition,
each read access to the input status register #1 (3BAh in mono / 3DAh in
color) resets the flipflop to load index.'' */
#define ATC_WritePort 0x03c0
#define ATC_ReadPort 0x03c1
/*
* VGA Sequencer Controller
*/
extern u_int8_t VGA_TSC[];
/* TSC registers
We leave out the undocumented register at 0x07. */
#define TSC_Reset 0x00
#define TSC_ClockingMode 0x01
#define TSC_MapMask 0x02
#define TSC_CharMapSelect 0x03
#define TSC_MemoryMode 0x04
#define TSC_Size 0x05
/* Port addresses for the TSC */
#define TSC_IndexPort 0x03c4
#define TSC_DataPort 0x03c5
/*
* VGA Graphics Controller
*/
extern u_int8_t VGA_GDC[];
/* GDC registers */
#define GDC_SetReset 0x00
#define GDC_EnableSetReset 0x01
#define GDC_ColorCompare 0x02
#define GDC_DataRotate 0x03
#define GDC_ReadMapSelect 0x04
#define GDC_Mode 0x05
#define GDC_Misc 0x06
#define GDC_ColorDontCare 0x07
#define GDC_BitMask 0x08
#define GDC_Size 0x09
/* Port addresses for the GDC */
#define GDC_IndexPort 0x03ce
#define GDC_DataPort 0x03cf
/*
* Miscellaneous VGA registers
*/
u_int8_t VGA_InputStatus0;
u_int8_t VGA_InputStatus1;
u_int8_t VGA_MiscOutput;
u_int8_t VGA_DAC_PELData;
u_int8_t VGA_DAC_PELMask;
u_int8_t VGA_DAC_PELReadAddr;
u_int8_t VGA_DAC_PELWriteAddr;
u_int8_t VGA_DAC_State;
/* Port addresses for miscellaneous VGA registers */
#define VGA_InputStatus0Port 0x03c2 /* Read-only */
#define VGA_InputStatus1Port 0x03da /* Read-only */
#define VGA_MiscOutputPortW 0x03c2 /* Write-only */
#define VGA_MiscOutputPortR 0x03cc /* Read-only */
/* Port addresses for VGA DAC registers */
#define VGA_DAC_PELDataPort 0x03c9 /* Read/Write */
#define VGA_DAC_PELMaskPort 0x03c6 /* Read/Write */
#define VGA_DAC_PELReadAddrPort 0x03c7 /* Write-only */
#define VGA_DAC_PELWriteAddrPort 0x03c8 /* Read/Write */
#define VGA_DAC_StatePortOut 0x03c7 /* Read-only */
/*
* Additional variables and type definitions
*/
/* To ease access to the palette registers, 'palette[]' will overlay the
Attribute Controller space. */
u_int8_t *palette;
/* Entry type for the DAC table. Each value is actually 6 bits wide. */
struct dac_colors {
u_int8_t red;
u_int8_t green;
u_int8_t blue;
};
/* We need a working copy of the default DAC table. This is filled from
'dac_default{64,256}[]' in 'video.c:init_vga()'. */
struct dac_colors *dac_rgb;
/*
* Video memory
*
* The video memory of a standard VGA card is 256K. For the standard modes,
* this is divided into four planes of 64K which are accessed according to the
* GDC state. Mode 0x13 will also fit within 64K. The higher resolution modes
* (VESA) require a bit more sophistication; we leave that for later
* implementation.
*/
/* Video RAM */
u_int8_t *vram;
/* Pointers to the four bit planes */
u_int8_t *vplane0;
u_int8_t *vplane1;
u_int8_t *vplane2;
u_int8_t *vplane3;
/* Pointer to the video memory. The base address varies with the video mode.
'vmem' is used directly only in the text modes; in the graphics modes, all
writes go to 'vram'. */
u_int16_t *vmem;
/*
* VGA status information
*
* Int 10:1b returns a 64 byte block of status info for the VGA card. This
* block also contains a couple of BIOS variables, so we will use it for
* general housekeeping.
*/
extern u_int8_t vga_status[];
/* Access to the VGA status fields. */
#define StaticFuncTbl *(u_int32_t *)&vga_status[0]
#define VideoMode *(u_int8_t *)&vga_status[4]
#define DpyCols *(u_int16_t *)&vga_status[5]
#define DpyPageSize *(u_int16_t *)&vga_status[7]
#define ActivePageOfs *(u_int16_t *)&vga_status[9]
#define CursCol0 *(u_int8_t *)&vga_status[11]
#define CursRow0 *(u_int8_t *)&vga_status[12]
#define CursCol1 *(u_int8_t *)&vga_status[13]
#define CursRow1 *(u_int8_t *)&vga_status[14]
#define CursCol2 *(u_int8_t *)&vga_status[15]
#define CursRow2 *(u_int8_t *)&vga_status[16]
#define CursCol3 *(u_int8_t *)&vga_status[17]
#define CursRow3 *(u_int8_t *)&vga_status[18]
#define CursCol4 *(u_int8_t *)&vga_status[19]
#define CursRow4 *(u_int8_t *)&vga_status[20]
#define CursCol5 *(u_int8_t *)&vga_status[21]
#define CursRow5 *(u_int8_t *)&vga_status[22]
#define CursCol6 *(u_int8_t *)&vga_status[23]
#define CursRow6 *(u_int8_t *)&vga_status[24]
#define CursCol7 *(u_int8_t *)&vga_status[25]
#define CursRow7 *(u_int8_t *)&vga_status[26]
#define CursStart *(u_int8_t *)&vga_status[27]
#define CursEnd *(u_int8_t *)&vga_status[28]
#define ActivePage *(u_int8_t *)&vga_status[29]
#define CRTCPort *(u_int16_t *)&vga_status[30]
#define CGA_ModeCtrl *(u_int8_t *)&vga_status[32]
#define CGA_ColorSelect *(u_int8_t *)&vga_status[33]
#define DpyRows *(u_int8_t *)&vga_status[34]
#define CharHeight *(u_int16_t *)&vga_status[35]
#define ActiveDCC *(u_int8_t *)&vga_status[37]
#define SecondDCC *(u_int8_t *)&vga_status[38]
#define NumColors *(u_int16_t *)&vga_status[39]
#define NumPages *(u_int8_t *)&vga_status[41]
#define VertResolution *(u_int8_t *)&vga_status[42]
#define PrimaryCharset *(u_int8_t *)&vga_status[43]
#define SecondaryCharset *(u_int8_t *)&vga_status[44]
#define MiscStatus *(u_int8_t *)&vga_status[45]
/*
#define Reserved1 *(u_int16_t *)&vga_status[46]
#define Reserved2 *(u_int8_t *)&vga_status[48]
*/
#define VMemSize *(u_int8_t *)&vga_status[49]
#define SavePointerStatus *(u_int8_t *)&vga_status[50]
/* VGA Static Functionality Table
This table contains mode-independent VGA status information. It is actually
defined in 'vparam.h'; the declaration here is just for completeness. */
extern u_int8_t static_functionality_tbl[];
/* Add some names for the VGA related BIOS variables. */
#define BIOS_VideoMode *(u_int8_t *)&BIOSDATA[0x49]
#define BIOS_DpyCols *(u_int16_t *)&BIOSDATA[0x4a]
#define BIOS_DpyPageSize *(u_int16_t *)&BIOSDATA[0x4c]
#define BIOS_ActivePageOfs *(u_int16_t *)&BIOSDATA[0x4e]
#define BIOS_CursCol0 *(u_int8_t *)&BIOSDATA[0x50]
#define BIOS_CursRow0 *(u_int8_t *)&BIOSDATA[0x51]
#define BIOS_CursCol1 *(u_int8_t *)&BIOSDATA[0x52]
#define BIOS_CursRow1 *(u_int8_t *)&BIOSDATA[0x53]
#define BIOS_CursCol2 *(u_int8_t *)&BIOSDATA[0x54]
#define BIOS_CursRow2 *(u_int8_t *)&BIOSDATA[0x55]
#define BIOS_CursCol3 *(u_int8_t *)&BIOSDATA[0x56]
#define BIOS_CursRow3 *(u_int8_t *)&BIOSDATA[0x57]
#define BIOS_CursCol4 *(u_int8_t *)&BIOSDATA[0x58]
#define BIOS_CursRow4 *(u_int8_t *)&BIOSDATA[0x59]
#define BIOS_CursCol5 *(u_int8_t *)&BIOSDATA[0x5a]
#define BIOS_CursRow5 *(u_int8_t *)&BIOSDATA[0x5b]
#define BIOS_CursCol6 *(u_int8_t *)&BIOSDATA[0x5c]
#define BIOS_CursRow6 *(u_int8_t *)&BIOSDATA[0x5d]
#define BIOS_CursCol7 *(u_int8_t *)&BIOSDATA[0x5e]
#define BIOS_CursRow7 *(u_int8_t *)&BIOSDATA[0x5f]
#define BIOS_CursStart *(u_int8_t *)&BIOSDATA[0x60]
#define BIOS_CursEnd *(u_int8_t *)&BIOSDATA[0x61]
#define BIOS_ActivePage *(u_int8_t *)&BIOSDATA[0x62]
#define BIOS_CRTCPort *(u_int16_t *)&BIOSDATA[0x63]
#define BIOS_CGA_ModeCtrl *(u_int8_t *)&BIOSDATA[0x65]
#define BIOS_CGA_ColorSelect *(u_int8_t *)&BIOSDATA[0x66]
#define BIOS_DpyRows *(u_int8_t *)&BIOSDATA[0x84]
#define BIOS_CharHeight *(u_int16_t *)&BIOSDATA[0x85]
#define BIOS_SaveTablePointer *(u_int32_t *)&BIOSDATA[0xa8]
/*
* Video modes
*
* This started as a big 'switch' statement in 'video.c:init_mode()' which
* soon became too ugly and unmanagable. So, we collect all mode related
* information in one table and define a couple of helper function to access
* it. This will also benefit the VESA support, whenever we get to that.
*/
typedef struct {
int modenumber; /* Mode number */
int paramindex; /* Index into the parameter table */
int type; /* Text or Graphics */
int numcolors; /* Number of colors */
int numpages; /* Number of display pages */
int vrescode; /* 0 = 200, 1 = 350, 2 = 400, 3 = 480 */
u_int32_t vmemaddr; /* Video memory address */
char *fontname; /* Font name */
} vmode_t;
/* Types. 'NOMODE' is one of the 'forbidden' internal modes. */
#define TEXT 0
#define GRAPHICS 1
#define NOMODE -1
extern vmode_t vmodelist[];
/* Font names */
#define FONTVGA "vga"
#define FONT8x8 "vga8x8"
#define FONT8x14 "vga8x14"
#define FONT8x16 "vga8x16" /* same as FONTVGA */
/* External functions in 'video.c'. */
void init_mode(int);
int find_vmode(int);
u_int8_t vga_read(u_int32_t);
void vga_write(u_int32_t, u_int8_t);
void video_bios_init(void);
void video_init(void);
int vmem_pageflt(struct sigframe *);
/* Other external variables, mostly from tty.c. Needs to be cleaned up. */
extern int vattr;
void write_vram(void *);
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