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mio0.asm
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; both mio0 and regular load are served by the same function
.orga 0x108694
.dw 0x80402000
.dw 0x80402000
.orga 0x1202000
.area 0x100, 0x01
ADDIU SP, SP, -0x20
SW RA, 0x14(SP)
LUI T0, 0x8039
LW T0, 0xBE28(T0)
; load data from commands
; A0 is either bank/ram address
LBU V0, 0x0(T0)
LBU A0, 0x3(T0)
LW A1, 0x4(T0)
LW A2, 0x8(T0)
; detect if static or dynamic
; 2nd byte tells
; if dynamic, we have done everything already
LBU T1, 0x2(T0)
ADDIU T0, R0, 1
BNE T1, T0, dynamic
NOP
; static
;bug check
; could be removed if wanted
static:
SLTIU AT, A0, 0x14
BEQ AT, R0, bugon
NOP
; prepare ptr in segment list
LUI T0, 0x8034
SLL T1, A0, 2
ADDU T9, T0, T1
SW T9, 0x18(SP)
; prepare ptr in static ram
SLL T1, A0, 2
LUI T0, 0x8040
ADDU T0, T0, T1
LW A0, 0x2220(T0)
SW A0, 0x1C(SP)
BEQ A0, R0, bugon
NOP
; do it -- select either 17 or 18 loader
LI T0, 0x18
BEQ T0, V0, mio0
NOP
JAL 0x80278504
NOP
B enddyn
NOP
mio0:
JAL 0x80402100
NOP
enddyn:
; set the new segment ptr
LW T9, 0x18(SP)
LW A0, 0x1C(SP)
LI T0, 0x00FFFFFF
AND A0, A0, T0
B end
SW A0, 0xB400(T9)
; these NOPs manipulate Wii rng, don't question them
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
dynamic:
JAL 0x8027868C
ADDIU A3, R0, 0
end:
LUI T0, 0x8039
LW T1, 0xBE28(T0)
LB T2, 0x1(T1)
ADDU T1, T1, T2
SW T1, 0xBE28(T0)
LW RA, 0x14(SP)
JR RA
ADDIU SP, SP, 0x20
bugon:
J 0
NOP
.endarea
; mio0 static loader, matched interface of cmd17 static loader
; A0 = ram address
; A1 = rom start
; A2 = rom end
.orga 0x1202100
.area 0x130, 0x01
ADDIU SP, SP, -0x30
SW RA, 0x14 (SP)
SW A0, 0x0024 (SP) ; 0x28 - bank // static ram = 0x24
SW A1, 0x002C (SP) ; 0x2C - rom start
SW A2, 0x0020 (SP) ; 0x30 - rom end
LI A0, 0x80670000 ; collision data, have like 0xB0000 space
SW A0, 0x001C (SP) ; 0x1C - alloced temp mio0
LW A1, 0x002C (SP)
JAL 0x80278504 ; dmacopy(ram mio0, rom start, rom end)
LW A2, 0x0020 (SP)
LW A0, 0x001C (SP)
JAL 0x8027F4E0 ; unpack(mio0 packed, mio0 unpacked)
LW A1, 0x0024 (SP)
LW RA, 0x14(SP)
JR RA
ADDIU SP, SP, 0x30
.endarea
.if readu32(outputname(), 0x1202000) == 0xD0FFBD27
; ptr load table
; this should be filled in from the target rom
.orga 0x1202220
.dw 0x00000000 ;0
.dw 0x00000000 ;1
.dw 0x00000000 ;2
.dw 0x00000000 ;3
.dw 0x00000000 ;4
.db readu8(outputname(), 0x1202172)
.db readu8(outputname(), 0x1202173)
.dh 0x0000 ;80 40 21 58 ;5
.db readu8(outputname(), 0x120213A)
.db readu8(outputname(), 0x120213B)
.dh 0x0000 ;80 40 21 20 ;6
.db readu8(outputname(), 0x1202102)
.db readu8(outputname(), 0x1202103)
.dh 0x0000 ;80 40 20 E8 ;7
.dw 0x00000000 ;80 40 22 00 ;8
.dw 0x00000000 ;80 40 22 00 ;9
.dw 0x00000000 ;80 40 22 00 ;A
.dw 0x00000000 ;80 40 22 00 ;B
.dw 0x00000000 ;80 40 22 00 ;C
.dw 0x00000000 ;80 40 22 00 ;D
.db readu16(outputname(), 0x12020CA)
.db readu16(outputname(), 0x12020CB)
.dh 0x0000 ;80 40 20 B0 ;E
.dw 0x00000000 ;80 40 22 00 ;F
.dw 0x00000000 ;80 40 22 00 ;10
.dw 0x00000000 ;80 40 22 00 ;11
.dw 0x00000000 ;80 40 22 00 ;12
.db readu16(outputname(), 0x12021AA)
.db readu16(outputname(), 0x12021AB)
.dh 0x0000 ;80 40 21 90 ;13
.endif