-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathcommon.mac
188 lines (160 loc) · 1.9 KB
/
common.mac
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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
; mov src, dst
; dst := [src]
mova .macro
sta \1
.endm
movx .macro
stx \1
.endm
movy .macro
sty \1
.endm
mov .macro
.if \?1 = ARG_REG
st\1 \2
.else
lda \1
sta \2
.endif
.endm
; mov16 src16, dst16
; dst16 := [src16]
; mov16 #src16, dst16
; dst16 := src16
mov16 .macro
.if \?1 = ARG_IMMED
mov #low(\1), \2
mov #high(\1), \2+1
.else
mov \1, \2
mov \1+1, \2+1
.endif
.endm
; mov16 src16, dst16
; dst16 := [src16 + x]
mov16sx .macro
lda \1,x
sta \2
lda \1+1,x
sta \2+1
.endm
; add16 dst16, src16
; dst16 := [dst16] + [src16]
; add16 dst16, #val16
; dst16 := [dst16] + val16
add16 .macro
clc
.if \?2 = ARG_IMMED
lda \1
adc #low(\2)
sta \1
lda \1+1
adc #high(\2)
sta \1+1
.else
lda \1
adc \2
sta \1
lda \1+1
adc \2+1
sta \1+1
.endif
.endm
; inc16 dst16
; dst16 := [dst16] + 1
inc16 .macro
add16 \1, #1
.endm
; asr16
asl16 .macro
asl \1+1
rol \1
.endm
;; converts pascal style strings to C style
;; src, dst, size
strcpyp2c .macro
ldy #0
ldx \3
beq .endloop\@
.loop\@:
lda [\1], Y
cmp #$61
bmi .no_upcase\@
cmp #$7B
bpl .no_upcase\@
;; upcase
sec
sbc #$20
.no_upcase\@:
sta \2, Y
iny
dex
bne .loop\@
.endloop\@:
mov #0, \2, Y
.endm
debug .equ 0
debug_num .macro
.if debug
sta debug_port
.endif
.endm
debug_p .macro
.if debug
pha
txa
pha
ldx #0
.start\@:
lda \1, X
beq .done\@
sta debug_str
inx
jmp .start\@
.done\@:
lda #$0a
sta debug_str
pla
tax
pla
.endif
.endm
; some ppu stuff
bgpal .equ $3f00
bgnam .equ $2020
ppua .macro
.if \?1 = ARG_IMMED
mov #high(\1), $2006
mov #low(\1), $2006
.else
mov \1+1, $2006
mov \1, $2006
.endif
.endm
ppuw .macro
mov \1, $2007
.endm
draw_text_as_sprites: .macro
ldx #0
.start\@:
clc
txa
asl A
asl A
tay
lda \1, X
beq .done\@
adc #$80
sta sprite+33, Y
lda #$30
sta sprite+32, Y
lda #1
sta sprite+34, Y
tya
asl A
adc #$60
sta sprite+35, Y
inx
jmp .start\@
.done\@:
.endm