If you are looking for this specific download, you are likely maintaining legacy code or using older hardware.
The HI-TECH C compiler was a industry standard for 8-bit PIC development for years due to its Omniscient Code Generation (OCG) hitech+c+compiler+for+pic10+12+16+mcus+v983+download+updated
– For new development on PIC10/12/16:
This is the biggest drawback.
The classic environment where HI-TECH compilers truly shine. If you are looking for this specific download,