; v1 = target CD #
; v0 = current disc inserted

8004ecd4 : 87830808  LH      0000000f (v1), 0808 (80082254 (gp)) [80082a5c]
8004ecd8 : 00000000  NOP    

; JMP = GOOD
8004ecdc : 10430002  BEQ     00000001 (v0), 00000000 (v1), 8004ece8,
8004ece0 : 24020009  ADDIU   00000001 (v0), 00000000 (r0), 0009 (9),

; BAD
8004ece4 : AE02000C  SW      00000009 (v0), 000c (80082be8 (s0)) [80082bf4]

; GOOD
8004ece8 : 8FBF0024  LW      8004ecd4 (ra), 0024 (801fff80 (sp)) [801fffa4]
8004ecec : 8FB00020  LW      80082be8 (s0), 0020 (801fff80 (sp)) [801fffa0]
8004ecf0 : 03E00008  JR      80013758 (ra),
8004ecf4 : 27BD0028  ADDIU   801fff80 (sp), 801fff80 (sp), 0028 (40),










800afb18 : 27BDFFE8  ADDIU   801ffe98 (sp), 801ffe98 (sp), ffe8 (65512),
800afb1c : 3C028008  LUI     800af8cc (v0), 8008 (32776),
800afb20 : AFB00010  SW      80090000 (s0), 0010 (801ffe80 (sp)) [801ffe90]

; TARGET DISC #

800afb24 : 84502A5C  LH      80090000 (s0), 2a5c (80080000 (v0)) [80082a5c]

800afb28 : AFBF0014  SW      800af8d4 (ra), 0014 (801ffe80 (sp)) [801ffe94]


; find inserted CD #

800afb2c : 0C013B05  JAL     8004ec14, 800af8d4 (ra),
800afb30 : 00000000  NOP    

 0:2.16 [10]
 0:2.16 [10]
 0:2.18 [12]
 0:2.22 [16]
 52:26.46 [39946] = DISC.BIN   $31-34 ==> 0-3


; s0 = target (0-3)
800afb34 : 16020003  BNE     00000000 (s0), 00000001 (v0), 800afb44,
800afb38 : 3C03800B  LUI     00000001 (v1), 800b (32779),

; GOOD
800afb3c : 0802BED4  J       800afb50,
800afb40 : 24040005  ADDIU   800aa968 (a0), 00000000 (r0), 0005 (5),
