INT 1A,1 - Set System Clock Counter
AH = 01 CX = high order word of tick count DX = low order word of tick count returns nothing - CX:DX should be set to the number of seconds past midnight multiplied by approximately 18.206
AH = 01 CX = high order word of tick count DX = low order word of tick count returns nothing - CX:DX should be set to the number of seconds past midnight multiplied by approximately 18.206