1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
; this is a commented out routine for save data validation
; sUnusedSaveDataValidationByte would be used to store some validation byte
; and xor'd with $250 bytes in SRAM starting from sCardCollection
; if the result wasn't 0, then it would mean there was
; some save corruption and an error message would pop up
StubbedUnusedSaveDataValidation:
ret
UnusedSaveDataValidation: ; unreferenced
ldh a, [hBankSRAM]
or a
ret nz
push hl
push de
push bc
ld hl, sCardCollection
ld bc, $250
ld a, [sUnusedSaveDataValidationByte]
ld e, a
.loop_xor
ld a, [hli]
xor e
ld e, a
dec bc
ld a, c
or b
jr nz, .loop_xor
ld a, e
pop bc
pop de
pop hl
or a
ret z
xor a
ld [wTileMapFill], a
ld hl, wDoFrameFunction
ld [hli], a
ld [hl], a
ldh [hSCX], a
ldh [hSCY], a
bank1call ZeroObjectPositionsAndToggleOAMCopy
call EmptyScreen
call LoadSymbolsFont
bank1call SetDefaultConsolePalettes
ld a, [wConsole]
cp CONSOLE_SGB
jr nz, .not_sgb
ld a, %11100100
ld [wOBP0], a
ld [wBGP], a
ld a, $01
ld [wFlushPaletteFlags], a
.not_sgb
lb de, $38, $9f
call SetupText
ldtx hl, YourDataWasDestroyedSomehowText
bank1call DrawWholeScreenTextBox
ld a, SRAM_ENABLE
ld [MBC3SRamEnable], a
xor a
ldh [hBankSRAM], a
ld [MBC3SRamBank], a
ld [MBC3RTC], a
ld [MBC3SRamEnable], a
jp Reset
ret
UnusedCalculateSaveDataValidationByte: ; unreferenced
ldh a, [hBankSRAM]
or a
ret nz
push hl
push de
push bc
ld hl, sCardCollection
ld bc, $250
ld e, $00
.loop_xor
ld a, [hli]
xor e
ld e, a
dec bc
ld a, c
or b
jr nz, .loop_xor
ld a, SRAM_ENABLE
ld [MBC3SRamEnable], a
ld a, e
ld [sUnusedSaveDataValidationByte], a
pop bc
pop de
pop hl
ret
|
