LAHF and SAHF are an interesting rabbit hole themselves. If you ever dug into x86 assembler programming... at first they make no sense at all. They only save/r

LAHF and SAHF are an interesting rabbit hole themselves. If you ever dug into x86 assembler programming... at first they make no sense at all. They only save/restore a tiny part of the available flag registers. The mnemonics themselves make little sense - load/store are not really used in any other base x86 mnemonics (unlike e.g. 6502 mnemonics, which use LD?/ST? instead of MOV like x86). It only clicked when I read an Intel document about porting assembler code from the 8080 to the 8086. LAHF/SAHF are basically convenience instructions to make porting easier. Many 8080 instructions did not alter the flags, unlike their 8086 counterparts. Substituting an `INX` instruction with `LAHF; INC; SAHF` made it possible to mechanically translate assembler source code. And yeah, 8080 mnemonics had LDA and STA like the 6502...