what emulator you use for x86 coding?
i need one that support as many features possible, for example vmx.

i use bochs, it is slow, but it is ok for many hw emultation.

Bochs and QEMU.

Dunno about QEMU, but Bochs has added VMX support in recent versions.

VMware has fast emulation(It's actually not emulated, but I'm not going to nit pick.), but isn't as configurable as Bochs. I have no experience with Qemu.

Both Bochs and QEMU do full emulation, although QEMU added "execute code natively" capability a while ago. Both have built-in debuggers, and focus more on developers/hackers whereas vmware focuses more on running applications (although later vmware versions have included gdb stubs - check this out!).

Iirc at least one of Bochs' developers work for Intel, probably a good indication of how accurate it tries to be - qemu also supports emulating other platforms than x86.

ok, about vmx now.
ive read first time manuals describing them, and im not happy. of course i will learn it more closely, but from what i can see, diffrent cpus might suport diffrent vmxes, and amd is even more diffrent.

could you explain me how does cpu manage memory access in vmx mode?
paging ive read is nessecart, but not always...


and is it posible to nest infinite (limited by resources) virtual os?

for example, real cpu is running linux. linux manage virtualization of other linux. other linux wich is virtualized, manage virtualizaiton of windows. and so on.

i know about basics, but im concerned about details wich sooner or later i will catch on, but i require help in understanding.