// restore SFR's as needed to T89C51RD2, enough that iap works
	IE = 0;
	P0 = P1 = P2 = P3 = 0xff;		// ports
	CCON = CMOD = CCAPM0 = CCAPM1 = CCAPM2 = CCAPM3 = CCAPM4 = 0x00;		// 
	CL = CCAP0L = CCAP1L = CCAP2L = CCAP3L = CCAP4L = 0x00;
	CH = CCAP0H = CCAP1H = CCAP2H = CCAP3H = CCAP4H = 0x00;
	CKCON = 0x00;
	AUXR = 0x08;
	TCON = 0x00;
	TMOD = 0x00;
	TH1 = TH0 = TL1 = TL0 = 0x00;
	EECON = 0x00;
	EETIM = 0x00;
	FCON = 0x00;
	T2MOD = 0x00;
	T2CON = 0x00;
	RCAP2L = RCAP2H = TL2 = TH2 = 0x00;
	SADEN = SADDR = 0x00;
	SCON = 0x00;
	PCON = 0x10;
	AUXR1 = 0x00;
	IP = IPH = 0x00;
	DPL = DPH = 0x00;
	B = ACC = 0x00;
	SP = 0x07;
	((void (code *) (void)) 0xfc00) ();	//http://www.keil.com/support/docs/307.htm