Function 10h    Set Palette Registers       (PCjr, Tandy 1000, EGA, MCGA, VGA) 


entry   AH      10h 


	AL      00h     set individual palette register 

			BH      color value to store 

			BL      palette register to set 

			        (on MCGA, only BX = 0712h is supported) 


		01h     set border color palette register 

			BH      color value to store 


		02h             set all palette registers and overscan 

			ES:DX   pointer to 17-byte list 

			        bytes 0-15   values for palette regs. 0-15 

			        byte 16      value for border color register 


		03h     toggle blink/intensity bit     (Jr, EGA, MCGA, VGA) 

			BL      00h     enable intensity 

			        01h     enable blink 


		04h     unknown 

		05h     unknown 

		06h     unknown 


		07h     read individual palette register                 (VGA) 

			BL      palette register number 

		return  BH      palette register value 


		08h     read overscan (order color) register             (VGA) 

		return  BH      value 


		09h     read all palette registers and overscan register (VGA) 

			ES:DX   pointer to buffer address (17 bytes) 


		10h     set individual video DAC color register    (MCGA, VGA) 

			BX      register number 

			CH      new value for green (0-63) 

			CL      new value for blue (0-63) 

			DH      new value for red (0-63) 


		11h     unknown 


		12h     set block of video DAC color registers     (MCGA, VGA) 

			BX      starting color register 

			CX      number of registers to set 

			ES:DX   table of 3*CX bytes where each 3 byte group 

			        represents one byte each of red, green and 

			        blue (0-63) 


		13h     set video DAC color page                         (VGA) 

			BH      00h     select 4 blocks of 64 

			BH      01h     select 16 blocks of 16 

			BL      00h     select paging mode 

			BL      01h     select Page 

			BH      page number (00h to 03h) or (00h to 0Fh) 

			        (not valid in mode 13h) 


		14h     unknown 


		15h     read individual video DAC color register   (MCGA, VGA) 

			BL      palette register number 

		return  DH      red value 

			CH      green value 

			CL      blue value 


		16h     unknown 


		17h     read block of video DAC color registers    (MCGA, VGA) 

			BX      starting palette register 

			CX      number of palette registers to read 

			ES:DX   buffer (3 * CX bytes in size) 

		return  CX number of red, green and blue triples in buffer 


		18h     *UNDOCUMENTED* set PEL mask 

			BL      new PEL value 


		19h     *UNDOCUMENTED* read PEL mask 

			BL      value read 


		1Ah     read video DAC color-page state                  (VGA) 

		return  BL      paging mode 

			        0       four pages of 64 

			        1       sixteen pages of 16 

			BH      current page 


		1Bh     perform gray-scale summing                 (MCGA, VGA) 

			BX      starting palette register 

			CX      number of registers to convert 

 

	BH      color value 

	BL      if AL=00h       palette register to set (00h-0Fh) 

		if AL=03h       0       to enable intensity 

			        1       to enable blinking 

	ES:DX   if AL=02h       pointer to 16-byte table of register values 

			        followed by the overscan value: 

			        bytes 0-15     values for palette registers 0-15 

			        byte 16        value for border register 

return  none 


note    DAC is Digital to Analog Convertor circuit in MCGA/VGA chips