I've connected a LED on port P2.3 and
have a piece of code that turns it on and off.

After programming the part with FLIP and
hitting "Start Application" the code works
as it should. (ie. the LED blinks)

I can switch the power supply on and off,
and it always works.

If, howewer, I disconnect the programming cable
(RES and PSEN, actually, leaving RXD,TXD,VCC,GND connected),
and then turning it on and off, the LED does start
to blink, but really, really fast.

I have a crystal osc on 48MHz.
RES pin is left floating.

What should I do?


Here is the code:
(the error label is never reached, the LED always blinks)

		mov	IEN0,#0		;disable all INTs
		jmp	prog

		org	100h
error:		jmp	$		;to signal ERROR/INT, if I get it anyway

prog:		mov	a,CKCON0	;is X2 on?
		jb	acc.0, error

		mov	a,CKRL		;clock prescaler?
		cjne	a, #0FFh, error

loop:		clr	P2.3
		acall	delay

		setb	P2.3
		acall	delay

		jmp	loop

delay:		mov	r1,0
		acall	delayMS
		mov	r1,0
		acall	delayMS
		mov	r1,0
		acall	delayMS
		mov	r1,0
		acall	delayMS
		mov	r1,0
		acall	delayMS
		mov	r1,0
		acall	delayMS
		ret

delayMS:	mov	r2,#26

dms1:		mov	r3,#32

		djnz	r3,$

		djnz	r2,dms1

		djnz	r1,delayMS
		ret