\x01\x03\x09!/\xffx\x85\x10\xff\x04y\x85\x0d \xf5\x0e \x10\xf1v
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
Disassemble:
ORG 00000H LD BC,00903H ;0000 01 03 09 . . . LD HL,0FF2FH ;0003 21 2F FF ! / . LD A,B ;0006 78 X ADD A,L ;0007 85 . DJNZ $+1 ;0008 10 FF . . INC B ;000A 04 . LD A,C ;000B 79 Y ADD A,L ;000C 85 . DEC C ;000D 0D . JR NZ,$-9 ;000E 20 F5 . LD C,00AH ;0010 0E 0A . . DJNZ $-13 ;0012 10 F1 . . HALT ;0014 76 V