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
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
; Value macros
; Many arbitrary percentages are simple base-10 or base-16 values:
; - 10 = 4 percent
; - 15 = 6 percent
; - $10 = 6 percent + 1 = 7 percent - 1
; - 20 = 8 percent
; - 25 = 10 percent
; - 30 = 12 percent
; - 40 = 16 percent
; - 50 = 20 percent - 1
; - 60 = 24 percent - 1
; - 70 = 28 percent - 1
; - 80 = 31 percent + 1 = 32 percent - 1
; - 85 = 33 percent + 1 = 34 percent - 1
; - 100 = 39 percent + 1 = 40 percent - 2
; - 120 = 47 percent + 1
; - 123 = 49 percent - 1
; - 160 = 63 percent
; - 180 = 71 percent - 1 = 70 percent + 2
; - 200 = 79 percent - 1
; - 230 = 90 percent + 1
percent EQUS "* $ff / 100"
; e.g. 1 out_of 2 == 50 percent + 1 == $80
out_of EQUS "* $100 /"
; Constant data (db, dw, dl) macros
dwb: MACRO
dw \1
db \2
ENDM
dbw: MACRO
db \1
dw \2
ENDM
dbbw: MACRO
db \1, \2
dw \3
ENDM
dbww: MACRO
db \1
dw \2, \3
ENDM
dbwww: MACRO
db \1
dw \2, \3, \4
ENDM
dn: MACRO ; nybbles
rept _NARG / 2
db ((\1) << 4) | (\2)
shift 2
endr
ENDM
dc: MACRO ; "crumbs"
rept _NARG / 4
db ((\1) << 6) | ((\2) << 4) | ((\3) << 2) | (\4)
shift 4
endr
ENDM
dx: MACRO
x = 8 * ((\1) - 1)
rept \1
db ((\2) >> x) & $ff
x = x - 8
endr
ENDM
dt: MACRO ; three-byte (big-endian)
dx 3, \1
ENDM
dd: MACRO ; four-byte (big-endian)
dx 4, \1
ENDM
bigdw: MACRO ; big-endian word
dx 2, \1 ; db HIGH(\1), LOW(\1)
ENDM
dba: MACRO ; dbw bank, address
rept _NARG
dbw BANK(\1), \1
shift
endr
ENDM
dab: MACRO ; dwb address, bank
rept _NARG
dwb \1, BANK(\1)
shift
endr
ENDM
; Reverses FixPicBank in engine/gfx/load_pics.asm
;
; Takes the actual bank of the pic in the ROM and returns the "defined" bank:
; BANK("Pics 12") -> $13
; BANK("Pics 13") -> $14
; BANK("Pics 14") -> $1f
;
; Otherwise, the ROM bank will match the defined bank.
dba_pic: MACRO ; dbw bank, address
db (BANK(\1) == BANK("Pics 12")) * ($13 - BANK("Pics 12")) \
+ (BANK(\1) == BANK("Pics 13")) * ($14 - BANK("Pics 13")) \
+ (BANK(\1) == BANK("Pics 14")) * ($1f - BANK("Pics 14")) \
+ (BANK(\1))
dw \1
ENDM
bcd: MACRO
rept _NARG
dn ((\1) % 100) / 10, (\1) % 10
shift
endr
ENDM
sine_table: MACRO
; \1 samples of sin(x) from x=0 to x<32768 (pi radians)
x = 0
rept \1
dw (sin(x) + (sin(x) & $ff)) >> 8 ; round up
x = x + DIV(32768, \1) ; a circle has 65536 "degrees"
endr
ENDM
|
