I created a tiny language (assembly level) when I was fifteen years of age. It could convert simple postfix mathematical expressions, including trigonometric f

I created a tiny language (assembly level) when I was fifteen years of age. It could convert simple postfix mathematical expressions, including trigonometric functions into machine code for a Zilog Z80 processor inside Sinclair ZX Spectrum+. I was unaware of compilers at that age, and came across a machine code sample which ran about two orders faster than BASIC. That motivated me to "invent" a compiler and create this proof of concept.