NEC made an enhanced clone of the 8086 called the V30 that had built-in 8080 support. It could be switched in and out of 8080 mode on the fly. This made it fair

NEC made an enhanced clone of the 8086 called the V30 that had built-in 8080 support. It could be switched in and out of 8080 mode on the fly. This made it fairly simple to write a program that allowed CP/M programs to run natively on an MS-DOS PC with a V30. The MS-DOS API was mostly a copy of the CP/M API, so all you had to do when you got a CP/M system call was switch the CPU into 16-bit mode, do the equivalent MS-DOS system call, and switch the CPU back to 8-bit mode.