> Lindy Mayfield wrote: > > Hasn't there been hardware memory protection since the 80286? Of > course, it has to be switched from real mode to protected mode. The > common GP fault error messages in Windows are hardware triggered, no? > > IIRC only really protected mode protected the OS, it really did not > protect one task from another. GPF's can be gererated by either hardware or software detecting various > issues.
More recent generations also have execution protection to prevent the cpu from fetching and executing "instructions" from a data area. This has caused a whole bunch of trouble for many less than well behaved applications. CC ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
