That's nothing. Try handcoding machine code some time! Using only pen, paper & cpu datasheet. ;-) If you feel generous, throw in a calculator for offsets or hex

That's nothing. Try handcoding machine code some time! Using only pen, paper & cpu datasheet. ;-) If you feel generous, throw in a calculator for offsets or hex/dec conversions etc. If I grow old & senile some day, I'll forget how to wipe my ass before the last Z80 mnemonic slips from my mind.