QEMU is a processor and machine emulato. It supports many different architectures (although the KaOS KCP package only supports x86_64 emulation). It is most commonly used with KVM to provide fast, efficient virtualization.
The QEMU package can be installed on its own, but for best results it is recommended you install the libspice, usbredir, libslirp, and libvirglrenderer packages first. These will enable extra QEMU features, providing better emulated graphics hardware, easy user-mode networking, and the ability to use SPICE clients with QEMU (which provide more fancy features like clipboard sharing and drag-n-drop file sharing). To install everything in the right order, use the following sequence of commands:
kcp -u
kcp -i libspice
kcp -i usbredir
kcp -i libslirp
kcp -i libvirglrenderer
kcp -i qemu
These packages should be updated in this same order to ensure they continue working together correctly.