This is a z80n-targeted repackaged snapshot of a Win64 build of SDCC - free open source, retargettable, optimizing ISO C compiler ( https://sdcc.sourceforge.net/ )
"Free open source, retargettable, optimizing ISO C compiler suite that targets a growing list of processors including the Intel MCS-51 based (8031, 8032, 8051, 8052, etc.), Maxim (formerly Dallas) DS80C390 variants, Freescale (formerly Motorola) HC08 based (hc08, s08), Zilog Z80 based MCUs (Z80, Z80N, Z180, SM83 (e.g. Game Boy...