I disagree, If you had equal problems with this then you could end up sending out your valueable code to customers without any protection. Maybe some devices with NO code protection could be made available. Martin > MChip should provide a code-protect-protect-bit... so that one can > protect himself agains accidentally programming the code-protectbit > > Regards, > > Jilles Oldenbeuving > jilles@rendo.dekooi.nl > > ------- > > I have been experimenting with a 16C73B for a couple of weeks with no > problems and in the last few days I have ruined 2 of them by accidentall= y > code protecting them. The first time I thought it had been my mistake, b= ut > then I has more carefull and the second one only lasted a couple of hour= s, > and I am completely sure about checking the code protection bits before > eache individual programming. > So I think this might have something to do with teh programmer (Ider HW = or > SW) or somehing about my PC. > I am using Bojan4s Picall programmer with home made HW on a generic pent= ium > 233 PC. > > Any ideas on what can be hapening? or what condition should I avoid to > reduce teh risk of this happening again? > This is not funy sience this chips cost $40 each here. > Regards, > > Esteban.