\x11ye!s \xcd\x03\x800\x01v\xeb}\xff|\xff\x18\xf3
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
Disassemble:
ORG 00000H LD DE,06579H ;0000 11 79 65 . Y E LD HL,02073H ;0003 21 73 20 ! S CALL 08003H ;0006 CD 03 80 . . . JR NC,$+3 ;0009 30 01 0 . HALT ;000B 76 V EX DE,HL ;000C EB . LD A,L ;000D 7D } RST 38H ;000E FF . LD A,H ;000F 7C | RST 38H ;0010 FF . JR $-11 ;0011 18 F3 . .