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HI-TECH C for Z80/Z180 offers a complete ANSI C embedded compiler package with a full development system for [[:Category:C |language C]] and [[:Category:Assembler|assembler]]. HI-TECH C supports the 64K memory model for the base [[Z80]], plus the expanded memory on the Z180 and 64180, or even user-defined banked memory on any other Z80 device, allowing a megabyte of program memory. Interrupt functions can be defined entirely in C, including mode 2 vectors, and I/O ports are mapped as C variables with the port qualifier.