# Introduction
Simple-V is a type of Vectorisation best described as a "Prefix Loop
-Subsystem" similar to the Z80 `LDIR` instruction and to the x86 `REP`
+Subsystem" similar to the 5 decades-old Zilog Z80 `LDIR` instruction and to the 8086 `REP`
Prefix instruction. More advanced features are similar to the Z80
`CPIR` instruction. If viewed as an actual Vector ISA it introduces
over 1.5 million 64-bit Vector instructions. SVP64, the instruction