Eidetic memory: What magic numbers you still remember?
- by Hao
Long before you practice writing readable code, what "magic numbers" you still remember up to this day?
here's some of my list:
72 80 75 77 13 32 27 - up down left right enter space escape
1 2 4 128 - blue green red blink
67h 33h 17h - interrupt for EMS, mouse, printer
function AH 9, interrupt 21
alt+219 for block ASCII
alt+164 ñ
90 NOP
13 10 carriage return, line feed
ascii 1 and 2 face, ascii 3 heart. no not this heart: <3 :-)
debug -o72,10 -o71,12 clears the BIOS password. I don't know what those numbers mean, it's like a trade secret that gets shared with each other during college days.
ascii 7 sounds a beep
P.S.
Somehow, remembering some of these magic numbers can help you in some tech problems, your keyboard is broken, the office pal's keyboard doesn't have accented characters. An anecdote, during college, one of my friend asked me how to remove the newlines in his Word document. Not having used Word so much then, I somehow "intuitively" guessed to find ^013 and replace it with blank. Well it works :-)
