After setting the ^ST pin of 1232 to ALE I am able to use flashmagic with it.

I was able to run signature and the flash .
Now before I load my program I would like know where to put this code

AUXR1 DATA 0A2h ;
WDTRST DATA 0A6h ;

PUBLIC GoToBoot

BOOTIT SEGMENT CODE

RSEG BOOTIT

GoToBoot:
mov AUXR1,#020h ;enable boot
mov r0,#20 ;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

I am using mlasm51 it gives me some errors unless I remove the code below
PUBLIC GoToBoot

BOOTIT SEGMENT CODE

RSEG BOOTIT

It compiles

Say I have a led flashing program

$mod51

org 0000h
check_ISP:
jb p1.1,ISP_boot ; P1.1 triggers ISP mode
cpl p1.0 ;p1.0 has led attached to it
call Delay ; 10ms delay routine
sjmp check_ISP
ISP_boot:

AUXR1 DATA 0A2h ;
WDTRST DATA 0A6h ;

GoToBoot:
mov AUXR1,#020h ;enable boot
mov r0,#11 ;oscillator freq = 11.0592Mhz
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

Does this program make any sense ? if so Please tell me how to make it compatible to mlasm51

If I don't use the notouch code wouldn't I be able to re-program the chip again ?


Thank you
Deepak