Whirl, N=2, 6486 bytes

Using only 2 characters, 01.

000110000011110000100000100000100000100000100000100000100000100000100000100110000011100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001111100000100010011110001000000011111000001000100111100010000000111110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001001111000100000001000011110000010001000001100 

Output :

 !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~}|{zyxwvutsrqponmlkjihgfedcba`_^]\[ZYXWVUTSRQPONMLKJIHGFEDCBA@?>=<;:9876543210/.-,+*)('&%$#"! 

I think I can golf down more using loops, but coding with 0s and 1s was horrible, so I won't do it.

Commented

00011000001111 // init math.val to O 0000100000100000100000100000100000100000100000100000100000100 // math.val to 32, mem to 32 110000 // set IO to print 0111001111000100000001111100000100 // print ascii(32), mem to 33 01001111000100000001111100000100 // print ascii(33), mem to 34 01001111000100000001111100000100 // print ascii(34), mem to 35 01001111000100000001111100000100 // print ascii(35), mem to 36 // skipped 01001111000100000001111100000100 // print ascii(l23), mem to l24 01001111000100000001111100000100 // print ascii(l24), mem to l25 01001111000100000001111100000100 // print ascii(l25), mem to l26 0100 // print ascii(l26) 111100010000000100001111000001000100 // mem to l25, print ascii(l25) 111100010000000100001111000001000100 // mem to l24, print ascii(l24) 111100010000000100001111000001000100 // mem to l23, print ascii(l23) // skipped 111100010000000100001111000001000100 // mem to 34, print ascii(34) 111100010000000100001111000001000100 // mem to 33, print ascii(33) 111100010000000100001111000001000100 // mem to 32, print ascii(32) 0001100 // KTHXBAI 

Note that there's O and l as 0 and 1.