Make game even more interesting -- 619 bytes.
Cat's Eye Technologies
7 years ago
| 143 | 143 |
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| 144 | 144 |
routine init_game {
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| 145 | 145 |
ldy #0
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146 |
ldx #0
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| 146 | 147 |
repeat bne {
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| 147 | 148 |
copy #$04 >actor_pos, y
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| 148 | |
tya
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| 149 | |
clc
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| 150 | |
asl .a
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| 151 | |
asl .a
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txa
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| 152 | 150 |
copy .a <actor_pos, y
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inx
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inx
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inx
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inx
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inx
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inx
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inx
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| 153 | 158 |
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| 154 | 159 |
// sigh
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| 155 | 160 |
// copy #$0001 actor_delta, y
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| 164 | 169 |
}
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| 165 | 170 |
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| 166 | 171 |
iny
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| 167 | |
cpy #8
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cpy #16
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| 168 | 173 |
}
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| 169 | 174 |
}
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| 170 | 175 |
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| 171 | 176 |
routine state_title_screen {
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lda #5
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sta vic_border
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lda #0
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sta vic_bg
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| 172 | 181 |
ldy #0
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| 173 | 182 |
repeat bne {
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| 174 | 183 |
lda press_fire_msg, y
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| 187 | 196 |
jmp (save_cinv)
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| 188 | 197 |
}
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| 189 | 198 |
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routine state_game_over {
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inc vic_border
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jsr check_fire
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if beq {
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copy routine state_title_screen to dispatch_state
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} else { }
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jmp (save_cinv)
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}
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| 190 | 208 |
routine logic_player {
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| 191 | 209 |
jsr read_stick
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| 192 | 210 |
jsr calculate_new_position
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| 193 | 211 |
jsr check_new_position_in_bounds
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| 194 | 212 |
if bcs {
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| 195 | |
lda #32
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| 196 | 213 |
ldy #0
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sta (position), y
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| 198 | |
copy new_position position
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| 199 | |
lda #81
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| 200 | |
ldy #0
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sta (position), y
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lda (new_position), y
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cmp #32
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if beq {
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lda #32
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ldy #0
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sta (position), y
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copy new_position position
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lda #81
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ldy #0
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sta (position), y
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} else {
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// copy routine state_game_over to dispatch_state
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}
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| 202 | 227 |
} else { }
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| 203 | 228 |
}
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| 204 | 229 |
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| 224 | 249 |
jsr calculate_new_position
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| 225 | 250 |
jsr check_new_position_in_bounds
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| 226 | 251 |
if bcs {
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| 227 | |
lda #32
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| 228 | 252 |
ldy #0
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| 229 | |
sta (position), y
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| 230 | |
copy new_position position
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| 231 | |
lda #82
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| 232 | |
ldy #0
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| 233 | |
sta (position), y
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lda (new_position), y
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cmp #32
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if beq {
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lda #32
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ldy #0
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sta (position), y
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copy new_position position
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lda #82
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ldy #0
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sta (position), y
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} else {
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copy routine state_game_over to dispatch_state
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}
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| 234 | 266 |
} else {
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| 235 | 267 |
jsr reverse_delta
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| 236 | 268 |
}
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| 257 | 289 |
copy delta actor_delta, x
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| 258 | 290 |
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| 259 | 291 |
inx
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| 260 | |
cpx #8
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292 |
cpx #16
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| 261 | 293 |
}
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| 262 | 294 |
jmp (save_cinv)
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| 263 | 295 |
}
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| 267 | 299 |
}
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| 268 | 300 |
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routine main {
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lda #5
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sta vic_border
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| 272 | |
lda #0
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| 273 | |
sta vic_bg
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| 274 | |
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| 275 | 302 |
jsr clear_screen
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| 276 | 303 |
copy routine state_title_screen to dispatch_state
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| 277 | 304 |
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gen (Directly l) [] = COPY (NamedLocation Nothing l) A
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gen (Directly l) [reg] = COPY (Indexed (NamedLocation Nothing l) reg) A
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| 443 | 443 |
gen (Indirectly l) [reg] = COPY (IndirectIndexed (NamedLocation Nothing l) reg) A
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gen x y = error ("Can't parse lda " ++ (show x) ++ (show y))
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| 444 | 445 |
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| 445 | 446 |
ldx :: Parser Instruction
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| 446 | 447 |
ldx = do
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