diff options
Diffstat (limited to 'usr.bin/doscmd/video.h')
| -rw-r--r-- | usr.bin/doscmd/video.h | 448 |
1 files changed, 335 insertions, 113 deletions
diff --git a/usr.bin/doscmd/video.h b/usr.bin/doscmd/video.h index 7b36eb7..32daebb 100644 --- a/usr.bin/doscmd/video.h +++ b/usr.bin/doscmd/video.h @@ -33,122 +33,344 @@ */ /* - * Motorola 6845 Video Controller registers + * 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 * - * They are read by - * OUT port,code - * IN port+1,res + * 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 * - * They are written by - * OUT port,code - * OUT port+1,value + * 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. */ -#define MVC_TotHorzChar 0x00 /* Total Horizontal Character */ -#define MVC_DispHorzChar 0x01 /* Display Horizontal Character */ -#define MVC_HorzSyncChar 0x02 /* Horizontal sync signal after ...char */ -#define MVC_HorzSyncDur 0x03 /* Duration of horizontal sync signal in char */ -#define MVC_TotVertChar 0x04 /* Total Vertical Character */ -#define MVC_AdjVertChar 0x05 /* Adjust Veritcal Character */ -#define MVC_DispVertChar 0x06 /* Display Vertical Charcter */ -#define MVC_VertSyncChar 0x07 /* Vertical sync signal after .. char */ -#define MVC_InterlaceMode 0x08 /* Interlace Mode */ -#define MVC_ScanLines 0x09 /* Number of scan lines per screen line */ -#define MVC_CurStartLine 0x0a /* Starting line of screen cursor */ -#define MVC_CurEndLine 0x0b /* Ending line of screen cursor */ - -#define MVC_CurHigh 0x0e /* High byte of cursor position */ -#define MVC_CurLow 0x0f /* High byte of cursor position */ +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] /* - * Additional MDA register + * 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. */ -#define MDA_StartDispPageLo 0x0c /* Starting address of displayed screen page (lo byte) */ -#define MDA_StartDispPageHi 0x0d /* Starting address of displayed screen page (hi byte) */ -#define MDA_BlinkCurAddrHi 0x0e /* Character address of blinking screen cursor (hi byte) */ -#define MDA_BlinkCurAddrLo 0x0f /* Character address of blinking screen cursor (lo byte) */ -#define MDA_LightPenHi 0x10 /* Light Pen Position (hi byte) */ -#define MDA_LightPenLo 0x11 /* Light Pen Position (lo byte) */ - -#define MDA_Control 0x03b8 /* MDA Control Register Port */ -#define MVC_Address 0x03b4 /* MVC Address Register */ -#define MVC_Data 0x03b5 /* MVC Data Register */ -#define MDA_VideoSeg 0xb800 /* Segmet address of video ram */ - -#define CGA_Control 0x03d8 /* CGA Control Register Port */ -#define CGA_Status 0x03da /* CGA Control Register Port */ -#define CVC_Address 0x03d4 /* CVC Address Register */ -#define CVC_Data 0x03d5 /* CVC Data Register */ - -#define CGA_Black 0x0 -#define CGA_Blue 0x1 -#define CGA_Green 0x2 -#define CGA_Cyan 0x3 -#define CGA_Red 0x4 -#define CGA_Magenta 0x5 -#define CGA_Brown 0x6 -#define CGA_LightGray 0x7 -#define CGA_DarkGray 0x8 -#define CGA_LightBlue 0x9 -#define CGA_LightGreen 0xa -#define CGA_LightCyan 0xb -#define CGA_LightRed 0xc -#define CGA_LightMagenta 0xd -#define CGA_Yellow 0xe -#define CGA_White 0xf - -#define VGA_Segment 0xa000 /* Starting Segment of VGA Memory */ -#define V_int 0x10 /* interrupt for dealing with screen */ -#define V_mode 0 /* code for setting new screen mode */ -#define V_curtype 1 /* code for setting new cursor type */ -#define V_setcur 2 /* code for addressing cursor */ -#define V_readcur 3 /* code for reading cursor location */ -#define V_readlp 4 /* code for reading light pen position */ -#define V_setpage 5 /* code to select active page */ -#define V_scrollup 6 /* code to scroll screen up */ -#define V_scrolldn 7 /* code to scroll screen nown */ -#define V_readch 8 /* code to read a character from screen */ -#define V_writeach 9 /* code to write char and attributes */ -#define V_writech 10 /* code to write character only */ -#define V_setpal 11 /* code to set new setpal or border */ -#define V_wdot 12 /* code to write a dot */ -#define V_rdot 13 /* code to read a dot */ -#define V_wtty 14 /* code to write as if teletype */ -#define V_state 15 /* code to find current screen status */ - -#define VM_40x25 0x00 -#define VM_80x25 0x02 -#define VM_320x200x4 0x04 -#define VM_640x200x2 0x06 -#define VM_80x25mono 0x07 -#define VM_320x200x16 0x0d -#define VM_640x200x16 0x0e -#define VM_640x350mono 0x0f -#define VM_640x350x16 0x10 -#define VM_640x480x2 0x11 -#define VM_640x480x16 0x12 -#define VM_320x200x256 0x13 -#define VM_80x30 0x50 -#define VM_80x43 0x51 -#define VM_80x60 0x52 -#define VM_132x25 0x53 -#define VM_132x30 0x54 -#define VM_132x43 0x55 -#define VM_132x60 0x56 -#define VM_132x25h 0x57 -#define VM_132x30h 0x58 -#define VM_132x43h 0x59 -#define VM_132x60h 0x5a -#define VM_800x600x16 0x5b -#define VM_640x400x256 0x5c -#define VM_640x480x256 0x5d -#define VM_800x600x256 0x5e -#define VM_1024x768x16 0x5f -#define VM_1024x768x4 0x60 -#define VM_768x1024x16 0x61 -#define VM_1024x768x256 0x62 - -#define VM_VGA VM_640x480x256 -#define VM_EVGA VM_800x600x256 -#define VM_SVGAportrait VM_768x1024x16 -#define VM_SVGA16 VM_1024x768x16 -#define VM_SVGA256 VM_1024x768x256 +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'. */ +extern void init_mode(int); +extern int find_vmode(int); +extern void vga_write(u_int32_t, u_int8_t); +extern void video_bios_init(void); +extern void video_init(void); +extern int vmem_pageflt(struct sigframe *); + +/* Other external variables, mostly from tty.c. Needs to be cleaned up. */ +extern int vattr; +void write_vram(void *); |
