Microsoft Virtual PC BUG

[Cemre]

Microsoft Virtual PC ( or should I say Connectix Virtual PC ? ) doesn't generate BreakPoint interrupt on task switch even if the TSS.T_IO bit is set on task state segment

how did i encounter this bug:
in my operating system, i use this interrupt ( breakpoint interrupt ) and clear "task swithed" flag on cr0 using "clts" to prevent a "No-Fpu" interrupt on an fpu operation instead of doing it right on "No-Fpu" interrupt.

in VMWare it worked fine, but on MS Virtual PC it crashed.

has anybody else encountered this bug?
if so let me know...

[iamxiaohan]

yes! I had encountered it! I found that the virtual pc can not handle it. So at last, i use bochs and vmware. ;p