Simics is a very mature simulator with a long history. It first appeared around 1997(SimICS/sun4m), modeling sun4m machine and support to bring-up Solaris 2.6. It is about 6 years before QEMU's first release(2003). But for roughly 2 decades it was marketed and sold by Virtutech and later Wind River, and only became freely available to the public as intel Simics after 2022.
This Simics tool is really powerful thing when it comes to system simulation
Simics is a very mature simulator with a long history. It first appeared around 1997(SimICS/sun4m), modeling sun4m machine and support to bring-up Solaris 2.6. It is about 6 years before QEMU's first release(2003). But for roughly 2 decades it was marketed and sold by Virtutech and later Wind River, and only became freely available to the public as intel Simics after 2022.