\xf9x\x04\xb7>1\xe0=\x0d\xe0v
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
Disassemble:
ORG 00000H LD SP,HL ;0000 F9 . LD A,B ;0001 78 X INC B ;0002 04 . OR A ;0003 B7 . LD A,031H ;0004 3E 31 > 1 RET PO ;0006 E0 . DEC A ;0007 3D = DEC C ;0008 0D . RET PO ;0009 E0 . HALT ;000A 76 V