Wine is animplementationof the WindowsAPI on top of Xand Unix. Itdoes notrequireMicrosoftWindows, butcan use nativeWindows DLLs ifthey areavailable. Itprovides both adevelopmenttoolkit forporting Windowssource code toUnix as well asa programloader,allowing manyunmodifiedWindowsprograms to runon x86-basedUnixes.
Bochs is apowerfulx86/amd64hardwareemulation anddebuggersoftware. Besides the CPUand instructset extensions,it simulatescommon PC/AThardware, anISA and PCIsystem bus,memory, disks,video hardware,ethernet, andenough of acompatible BIOSto runDOS/Winows,Linux/BSD,Minix and otheroperatingsystems. Itdoesn'tprovidevirtualization,thus runsextremely slow,but is safe torun for thehost operatingsystem.