There was unloved informatics in school and loved informatics at home. Unloved informatics consisted of graph flow optimizations. Loved informatics consisted of EGA programming and IRQ interrupt handling for multiple keypress detection and other stuff. Both informatics were in Turbo Pascal, but in sport olympiads going to interrupts or assembler was prohibited. Not that it was going to help, but… when olympiads end, I was going those doors again, and others did not. For others my loved informatics was door remaining shut.

20 years later it is an excercize to find a device where loved EGA programming tricks work. Only unloved informatics remained

86Box is what you want for this kind of nostalgic programming, comrade.

Our teachers didn't know much about this stuff in school. The origin of my username here (and elsewhere) is from those classes at school; I once submitted an assignment that, under certain conditions, used inline asm in Turbo Pascal to do "INT 19h". Had to explain it later, but thankfully that particular teacher was more amused than offended.