Worked beautifully
When I ground p1.0 and reset it enters ISP mode and flash magic works else the program keeps executing

I have pasted the shabby piece of code, which i used to verify if it works.
I checked he O/p of p2.0 & 2.1 with a logic probe.
it keeps getting complemented after delay.


Thank you very much everyone..

Deepak

$mod51
org 0000h
sjmp main

VAR1 EQU R0
VAR2 EQU R1
VAR3 EQU R2
;*************************************************

;****1Sec Delay routine****************
DELAY:
MOV VAR3,#8
MOV VAR2,#8
MOV VAR1,#236
TT1:
DJNZ VAR1,TT1
DJNZ VAR2,TT1
DJNZ VAR3,TT1
RET
;****End of Delay routine *************


main:
jnb p1.0,ISP_Boot
cpl p2.0
cpl p2.1
call delay
call delay
sjmp main

ISP_Boot:
AUXR1 DATA 0A2h ;
WDTRST DATA 0A6h ;

GoToBoot:
mov AUXR1,#020h ;enable boot
mov r0,#11 ;oscillator freq = 20Mhz
mov r1,#6h ;program status byte
mov dptr,#0 ;specify status byte
mov a,#0ffh ;nonzero required
call 0fff0h
jmp $ ;wait for watchdog to reset


end

Deepak