qemu

QEMU is a generic and open source processor emulator which achieves a good emulation speed by using dynamic translation.

SlackBuild

   1 cd /tmp
   2 wget http://slackbuilds.org/slackbuilds/14.0/system/qemu.tar.gz
   3 tar xvzf qemu.tar.gz
   4 cd qemu
   5 wget http://wiki.qemu.org/download/qemu-1.6.0.tar.bz2
   6 ./qemu.SlackBuild
   7 installpkg /tmp/qemu-1.6.0-i486-1_SBo.tgz

From source

   1 cd /tmp
   2 wget https://download.qemu.org/qemu-8.2.2.tar.xz 
   3 tar xivf qemu-8.2.2.tar.xz 
   4 cd /tmp/qemu/qemu-8.2.2/
   5 mkdir build
   6 cd build
   7 ../configure
   8 make
   9 sudo make install