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Text File | 1991-03-15 | 22.1 KB | 867 lines

..pgno28 ..foot60A7-## ..head02L----------------------------------------------------------------- ..head04L----------------------------------------------------------------- ..head03AbvSet1FhFontPtr ■ Display Adapters [EGA] [MCGA] [VGA] ■ Source Module Name b101120d.asm ■ Description Sets the Int 1Fh pointer to the user's font table. The table is used for character codes 80h-FFh in graphics modes 04H-06H. ■ Summary Procedure bvSet1FhFontPtr( Var fonttbl ); Parameter Description --------- ------------------------------------------------- fonttbl pointer to the font table ■ Remarks If this function is used at any other time than immediately after a set mode, the results will be unpredictable. ..page ..head03AbvSet43h8x14Font ■ Display Adapters [EGA] [MCGA] [VGA] ■ Source Module Name b101122d.asm ■ Description Sets the vector for Int 43h to point to the ROM BIOS default 8x14 font and updates the video ROM BIOS data area. ■ Summary Procedure bvSet43h8x14Font( spec, scnrows : Integer ); Parameter Description --------- ------------------------------------------------- spec must be a value from 0-3 to specify the number of character rows on the screen. Specifier Description --------- ----------------------------- 00 use value in scnrows variable 01 14 rows 02 25 rows 03 43 rows scnrows number of rows per screen when spec(ifier) is zero. ■ Remarks If this function is used at any other time than immediately after a set mode, the results will be unpredictable. When this function is used on the MCGA, the BIOS substitutes function call bvSet43h8x16Font. ..page ..head03AbvSet43h8x16Font ■ Display Adapters [MCGA] [VGA] ■ Source Module Name b101124d.asm ■ Description Sets the vector for Int 43h to point to the ROM BIOS default 8x16 font and updates the video ROM BIOS data area. ■ Summary Procedure bvSet43h8x16Font( spec, scnrows : Integer ); Parameter Description --------- ------------------------------------------------- spec must be a value from 0-3 to specify the number of character rows on the screen. Specifier Description --------- ----------------------------- 00 use value in scnrows variable 01 14 rows 02 25 rows 03 43 rows scnrows number of rows per screen when spec(ifier) is zero. ■ Remarks If this function is used at any other time than immediately after a set mode, the results will be unpredictable. ..page ..head03AbvSet43h8x8Font ■ Display Adapters [EGA] [MCGA] [VGA] ■ Source Module Name b101123d.asm ■ Description Sets the vector for Int 43h to point to the ROM BIOS default 8x8 font and updates the video ROM BIOS data area. ■ Summary Procedure bvSet43h8x8Font( spec, scnrows : Integer ); Parameter Description --------- ------------------------------------------------- spec must be a value from 0-3 to specify the number of character rows on the screen. Specifier Description --------- ----------------------------- 00 use value in scnrows variable 01 14 rows 02 25 rows 03 43 rows scnrows number of rows per screen when spec(ifier) is zero. ■ Remarks If this function is used at any other time than immediately after a set mode, the results will be unpredictable. ..page ..head03AbvSet43hUsrFont ■ Display Adapters [EGA] [MCGA] [VGA] ■ Source Module Name b101121d.asm ■ Description Sets the vector for Int 43h to point to the user's font table and update the video ROM BIOS data area. ■ Summary Procedure bvSet43hUsrFont( rows : Integer; points : Integer; scnrows : Integer; Var fonttbl ); Parameter Description --------- ------------------------------------------------- rows character rows specifier points bytes per character scnrows rows per screen fonttbl pointer to the user font table ■ Remarks If this function is used at any other time than immediately after a set mode, the results will be unpredictable. ..page ..head03AbvSetAltPrtSc ■ Display Adapters [EGA] [VGA] ■ Source Module Name b101220d.asm ■ Description Selects an alternate print-screen routine for the EGA and VGA that works properly if the screen length is not 25 lines. ■ Summary Procedure bvSetAltPrtSc; ..page ..head03AbvSetBlink ■ Display Adapters [PCjr] [EGA] [MCGA] [VGA] ■ Source Module Name b101003d.asm ■ Description Determines if the significate bit in an attribute will display either blinking or intensified. ■ Summary Procedure bvSetBlink( state : Integer ); Parameter Description --------- ------------------------------------------------- state 0 - enables intensity 1 - enables blinking ..page ..head03AbvSetBlkSpec ■ Display Adapters [EGA] [MCGA] [VGA] ■ Source Module Name b101103d.asm ■ Description Determies character blocks selected by bit 3 of the character attribute bytes in alphanumeric display modes. ■ Summary Procedure bvSetBlkSpec( block : Integer ); Parameter Description --------- ------------------------------------------------- block select code for char generator block ■ Remarks EGA, MCGA 0,1 indicates which 1 of 4 256 character tables is used when bit 3 of character's attribute byte is zero. 2,3 indicate which table is used when bit 3 is set on. VGA Bits Description ------- ------------------------------------------------- 0,1,4 speicify 1 of 8 tables when bit 3 is zero. 2,3,5 specifiy table when attribute bit 3 is one. ..page ..head03AbvSetBorder ■ Display Adapters [PCjr] [EGA] [VGA] ■ Source Module Name b101001d.asm ■ Description Controls the color of the screen border. ■ Summary Procedure bvSetBorder( color : Integer ); Parameter Description --------- ------------------------------------------------- color color of border. Range (0-63). ..page ..head03AbvSetColorPgMode ■ Display Adapters [VGA] ■ Source Module Name b101013d.asm ■ Description Sets paging mode for color registers ■ Summary Procedure bvSetColorPgMode( pgstate : Integer ); Parameter Description --------- ------------------------------------------------- pgstate 00 - sets 4 pages of 64 registers 01 - sets 16 pages of 16 registers ■ Remarks This function is invalid for graphics video mode 13H (320x200, 256 colors). ..page ..head03AbvSetColorReg ■ Display Adapters [MCGA] [VGA] ■ Source Module Name b101010d.asm ■ Description Set red-green-blue values for a color register ■ Summary Procedure bvSetColorReg( colorreg : Word; green : Integer; blue : Integer; red : Integer ); Parameter Description --------- ------------------------------------------------- colorreg color register green green color value blue blue color value red red color value ■ Remarks When gray-scale summing is on, the gray-scale weighted values are calculated as described under the function bvSetGrayScale and stored into the components of the color register. ..page ..head03AbvSetColorRegBlk ■ Display Adapters [MCGA] [VGA] ■ Source Module Name b101012d.asm ■ Description Set a series of consecutive color registers. ■ Summary Procedure bvSetColorRegBlk( startreg : Word; regcount : Integer; Var colortbl ); Parameter Description --------- ------------------------------------------------- startreg first color register regcount number of registers colortbl color table that consists of 3 bytes for every register. Each group of 3 bytes will specify the red, green, and blue values, respectively for the associated register. ■ Remarks When gray-scale summing is on, the gray-scale weighted values are calculated as described under the function bvSetGrayScale and stored into the components of the color register. ..page ..head03AbvSetColorRegPg ■ Display Adapters [VGA] ■ Source Module Name b101013d.asm ■ Description Set a color register page. ■ Summary Procedure bvSetColorRegPg( pg : Integer ); Parameter Description --------- ------------------------------------------------- pg color register page to select. ■ Remarks This function is invalid for graphics video mode 13H (320x200, 256 colors). ..page ..head03AbvSetCurPos ■ Display Adapters [MDA] [CGA] [PCjr] [EGA] [MCGA] [VGA] ■ Source Module Name b100200d.asm ■ Description Sets cursor position for the selected page. ■ Summary Procedure bvSetCurPos( pg, row, col : Integer ); Parameter Description --------- ------------------------------------------------- pg page to set cursor position row row (y coordinate) col col (x coordinate) ..page ..head03AbvSetCurType ■ Display Adapters [MDA] [CGA] [PCjr] [EGA] [MCGA] [VGA] ■ Source Module Name b100100d.asm ■ Description Selects starting and ending scan lines for the cursor in text modes. ■ Summary Procedure bvSetCurType( StScan, SpScan : Integer ); Parameter Description --------- ------------------------------------------------- StScan starting scan line for cursor SpScan ending scan line for cursor ■ Remarks In text modes, the hardware causes the cursor to blink, which cannot be disabled. In graphics mode, the cursor is not available. The scan line ranges for the cursor are: Mode Start End ---- ----- --- 7 0 12 0-3 0 7 0 ----+ 1 | 2 | 3 +---> Scan lines for a Color/Graphics display. 4 | 5 | 6 | 7 ----+ In text modes 0-3 the EGA, MCGA, and VGA provide cursor emulation for the starting and ending scan lines. The staring and ending values are remapped from an 8x8 cell to the true character cell dimension. One technique used to hide the cursor is by passing in the value 32 for the starting and ending scan lines. ..page ..head03AbvSetGrayScale ■ Display Adapters [MCGA] [VGA] ■ Source Module Name b10101bd.asm ■ Description Sets red, green and blue values of one or more color registers into the gray-scale equivalents. ■ Summary Procedure bvSetGrayScale( startreg : Word; regcount : Integer ); Parameter Description --------- ------------------------------------------------- startreg first color register regcount number of registers ■ Remarks For the range of color registers specified, each register is read and each new color value is calculated as 30% red + 59% green + 11% blue. ..page ..head03AbvSetMode ■ Display Adapters [MDA] [CGA] [PCjr] [EGA] [MCGA] [VGA] ■ Source Module Name b1000xxd.asm ■ Description Set video display mode. ■ Summary Procedure bvSetMode( mode, clear : Word ); Parameter Description --------- ------------------------------------------------- mode video mode to set clear 0 - clear display buffer for new mode. 1 - do not clear display buffer for new mode. This parameter is ignored on PC's and PC/XT's with a cga or monochrome display adapter. ■ Remarks The video modes applicable for the various video adapters are as follows: Text/ Mode Resolution Colors Graphics MDA CGA PCjr EGA MCGA VGA 00h 40x25 16 text . . . . . 01 40x25 16 text . . . . . 02 80x25 16 text . . . . . 03 80x25 16 text . . . . . 04 320x200 4 graphics . . . . . 05 320x200 4 graphics . . . . . 06 640x200 2 graphics . . . . . 07 80x25 2* text ∙ . . 08 160x200 16 graphics . 09 320x200 16 graphics . 0A 640x200 4 graphics . ..page Text/ Mode Resolution Colors Graphics MDA CGA PCjr EGA MCGA VGA 0B reserved 0C reserved 0D 320x200 16 graphics . . 0E 640x200 16 graphics . . 0F 640x350 2* graphics .** . 10 640x350 4 graphics .*** 10 640x350 16 graphics . . 11 640x480 2 graphics . . 12 640x480 16 graphics . 13 320x200 256 graphics . . * Monochrome monitor only. ** EGA with 64 KB of RAM. *** EGA with 128 KB or more of RAM. On the PC/AT, PCjr, and PS/2, if the "clear" parameter is set, the display buffer is not cleared when a new mode is selected. This capability is only available on PC or PC/XT when an EGA or VGA adapter is installed. ..page ..head03AbvSetPage ■ Display Adapters [MDA] [CGA] [PCjr] [EGA] [MCGA] [VGA] ■ Source Module Name b100500d.asm ■ Description Select active display page ■ Summary Procedure bvSetPage( pg : Integer ); Parameter Description --------- ------------------------------------------------- pg page to select. ..page ..head03AbvSetPalBorder ■ Display Adapters [PCjr] [EGA] [VGA] ■ Source Module Name b101002d.asm ■ Description Sets palette registers and border color ■ Summary Procedure bvSetPalBorder( list : ByteArry17 ); Parameter Description --------- ------------------------------------------------- list Bytes 0-15 are the color values to be loaded into the appropriate palette registers. Byte 16 is stored in the border color register. ..page ..head03AbvSetPalReg ■ Display Adapters [PCjr] [EGA] [MCGA] [VGA] ■ Source Module Name b101000d.asm ■ Description Sets appropriate palette register to a displayable color. ■ Summary Procedure bvSetPalReg( color, reg : Integer ); Parameter Description --------- ------------------------------------------------- color color value reg palette register ■ Remarks For MCGA the color must be 07h and the reg variable must be 012h. ..page ..head03AbvSetScanLines ■ Display Adapters [VGA] ■ Source Module Name b101230d.asm ■ Description Selects the number of scan lines for text modes. The selected value takes effect the next time the bvSetMode function is called to select the display mode. ■ Summary Function bvSetScanLines( scancode : Integer ) : Integer; Parameter Description --------- ------------------------------------------------- scancode 0 - 200 scan lines 1 - 350 scan lines 2 - 400 scan lines ■ Function Return Value 18 - VGA is active 00 - VGA is not active ..page ..head03AbvSetState0B ■ Display Adapters [CGA] [PCjr] [EGA] [MCGA] [VGA] ■ Source Module Name b100b00d.asm ■ Description In text mode the border color is set. Graphics mode sets the border and background color. ■ Summary Procedure bvSetState0B( color : Integer ); Parameter Description --------- ------------------------------------------------- color color to set background, border ..page ..head03AbvSwDsp ■ Display Adapters [VGA] ■ Source Module Name b101235d.asm ■ Description Allows selection of one of two video adapters in the system, when memory usage or port addresses conflict between the two adapters. ■ Summary Function bvSwDsp( setting : Integer; Var buffer ) : Word; Parameter Description --------- ------------------------------------------------- setting 0 - disable initial video adapter 1 - enable system board video adapter 2 - disable active video adapter 3 - enable inactive video adapter buffer 128-byte buffer to use if setting is 1, 2, or 3. ■ Function Return Value 18 - Function is supported. If the function is called with setting set to 0 or 2 then the video adapter state information is stored in the buffer variable. If the function is called with setting set to 3 then the information in the buffer variable will be used to restore the video adapter state. ..page ..head03AbvVioAccess ■ Display Adapters [MCGA] [VGA] ■ Source Module Name b101232d.asm ■ Description Enables or disables CPU access to the video adapter's I/O prts and video refresh buffer. ■ Summary Function bvVioAccess( setting : Integer ) : Integer; Parameter Description --------- ------------------------------------------------- setting 0 - enables access 1 - disable access ■ Function Return Value 18 - Function is supported. ..page ..head03AbvWrtNCell ■ Display Adapters [MDA] [CGA] [PCjr] [EGA] [MCGA] [VGA] ■ Source Module Name b100900d.asm ■ Description Write a character and attribute to the display at the current cursor position for n times. ■ Summary Procedure bvWrtNCell( ch, attr, count, pg : Integer ); Parameter Description --------- ------------------------------------------------- ch character attr attribute count number of cells to replication pg page to write cell to ■ Remarks The cursor position is not updated are the character attribute values are displayed. In graphics mode the replication factor given in count will display character attribute combinations only for the current row. All characters will display something, including the bell, backspace, carriage return and the line feed. These control characters are NOT recognized as special characters and will not affect the cursor position. The character definition tables is stored in the vector for the bvSet43hxxxxFont functions for the EGA, MCGA and VGA displays inn graphics modes. ..page ..head03AbvWrtNChar ■ Display Adapters [MDA] [CGA] [PCjr] [EGA] [MCGA] [VGA] ■ Source Module Name b100a00d.asm ■ Description Write a character to the display at the current cursor position for n times. ■ Summary Procedure bvWrtNChar( ch, count, pg : Integer ); Parameter Description --------- ------------------------------------------------- ch character count number of cells to replication pg page to write cell to ..page ..head03AbvWrtPix ■ Display Adapters [MDA] [CGA] [PCjr] [EGA] [MCGA] [VGA] ■ Source Module Name b100c00d.asm ■ Description Display pixel at the specified graphics coordinates ■ Summary Procedure bvWrtPix( row, col, pixval, pg : Integer ); Parameter Description --------- ------------------------------------------------- row row for pixel to be displayed on col col for pixel to be displayed on pixval color of pixel pg page to display pixel on ..page ..head03AbvWrtTTYChar ■ Display Adapters [MDA] [CGA] [PCjr] [EGA] [MCGA] [VGA] ■ Source Module Name b100e00d.asm ■ Description Write character at the current cursor position using the color speicifed (if in graphics mode). ■ Summary Procedure bvWrtTTYChar( ch, pg, color : Integer ); Parameter Description --------- ------------------------------------------------- ch character to display pg page to display the character on color color of character if in graphics mode ..page ..head03AbvWrtTTYStr ■ Display Adapters [MDA] [CGA] [PCjr] [EGA] [MCGA] [VGA] ■ Source Module Name b1013xxd.asm ■ Description Displays a string to the video buffer starting at the specified location. ■ Summary Procedure bvWrtTTYStr( mode, row, col, len, pg, attr : Integer Var st ); Parameter Description --------- ------------------------------------------------- mode 0 - use attr, st is chars only, cursor not updated 1 - use attr, st is chars only, cursor updated 2 - st is char, attr; cursor not updated 3 - st is char, attr; cursor updated row y coordinate col x coordinate len length of st pg display page to display string on. attr attribute is mode is 0 or 1 st string to display on the screen ..page