\xcfeat boo \xcd\x03\x808\x04\xfe \xd5 vx\x04\xe6\x04o> \xff#~\xfe \xf9
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
Disassemble:
ORG 00000H RST 8 ;0000 CF . LD H,L ;0001 65 E LD H,C ;0002 61 A LD (HL),H ;0003 74 T LD A,(BC) ;0004 0A . LD H,D ;0005 62 B LD L,A ;0006 6F O LD L,A ;0007 6F O LD A,(BC) ;0008 0A . CALL 08003H ;0009 CD 03 80 . . . JR C,$+6 ;000C 38 04 8 . CP 00AH ;000E FE 0A . . PUSH DE ;0010 D5 . JR NZ,$+120 ;0011 20 76 V LD A,B ;0013 78 X INC B ;0014 04 . AND 004H ;0015 E6 04 . . LD L,A ;0017 6F O LD A,020H ;0018 3E 20 > RST 38H ;001A FF . INC HL ;001B 23 # LD A,(HL) ;001C 7E ~ CP 00AH ;001D FE 0A . . JR NZ,$-5 ;001F 20 F9 .