INT 10 - SpeedSTAR Plus BIOS v4.23+ - SET SYNC PARAMETERS

	AH = 1Dh
	AL = video mode
	ES = caller's segment
Return: nothing
Note:	the caller's segment contains at offset 5Ch (FCB field in PSP)
	  or 100h a table with sync parameters (see #00051) (BIOS looks at both
	  offsets)