adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2003, Adam Dunkels. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above |
| 11 | * copyright notice, this list of conditions and the following |
| 12 | * disclaimer in the documentation and/or other materials provided |
| 13 | * with the distribution. |
| 14 | * 3. All advertising materials mentioning features or use of this |
| 15 | * software must display the following acknowledgement: |
| 16 | * This product includes software developed by Adam Dunkels. |
| 17 | * 4. The name of the author may not be used to endorse or promote |
| 18 | * products derived from this software without specific prior |
| 19 | * written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS |
| 22 | * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 23 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| 25 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
| 27 | * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 29 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 | * |
| 33 | * This file is part of the Contiki VNC client |
| 34 | * |
oliverschmidt | a5b57db | 2004-07-18 13:23:28 +0000 | [diff] [blame] | 35 | * $Id: vnc-draw.c,v 1.2 2004/07/18 13:23:28 oliverschmidt Exp $ |
adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 36 | * |
| 37 | */ |
| 38 | |
| 39 | |
| 40 | |
| 41 | #include "vnc-draw.h" |
| 42 | #include "vnc-draw-asm.h" |
| 43 | |
| 44 | #include "vnc-conf.h" |
| 45 | |
| 46 | |
| 47 | static unsigned char conv[256]; |
| 48 | |
| 49 | static unsigned char oratab[8] = |
| 50 | { 0x80, 0x40, 0x20, 0x10, |
| 51 | 0x08, 0x04, 0x02, 0x01 }; |
| 52 | static unsigned char andtab[8] = |
| 53 | { 0x7f, 0xbf, 0xdf, 0xef, |
| 54 | 0xf7, 0xfb, 0xfd, 0xfe }; |
| 55 | |
| 56 | static u8_t *bitmapptrtab[VNC_CONF_VIEWPORT_HEIGHT]; |
| 57 | |
| 58 | static unsigned short viewport_x, |
| 59 | viewport_y, viewport_w, viewport_h; |
| 60 | |
| 61 | u8_t vnc_draw_bitmap[(VNC_CONF_VIEWPORT_WIDTH / 8) * |
| 62 | VNC_CONF_VIEWPORT_HEIGHT]; |
| 63 | |
| 64 | |
| 65 | |
| 66 | u16_t vnc_draw_x; |
| 67 | u16_t vnc_draw_y; |
| 68 | u8_t *vnc_draw_dataptr; |
| 69 | u8_t *vnc_draw_bitmapptr; |
| 70 | u16_t vnc_draw_datalen; |
| 71 | |
| 72 | /*-----------------------------------------------------------------------------------*/ |
| 73 | void |
| 74 | vnc_draw_pixel(u16_t x, u8_t y, u8_t c) |
| 75 | { |
| 76 | u8_t o, a; |
| 77 | |
| 78 | vnc_draw_bitmapptr = bitmapptrtab[y] + (x & 0x1f8); |
| 79 | |
| 80 | if(c) { |
| 81 | o = oratab[x & 7]; |
| 82 | *vnc_draw_bitmapptr = *vnc_draw_bitmapptr | o; |
| 83 | } else { |
| 84 | a = andtab[x & 7]; |
| 85 | *vnc_draw_bitmapptr = *vnc_draw_bitmapptr & a; |
| 86 | } |
| 87 | } |
| 88 | /*-----------------------------------------------------------------------------------*/ |
| 89 | void |
| 90 | vnc_draw_pixelline(u16_t x, u16_t y, u8_t *data, u16_t datalen) |
| 91 | { |
| 92 | u8_t o, a; |
| 93 | register u8_t *bitmapptr; |
| 94 | |
| 95 | vnc_draw_x = x - viewport_x; |
| 96 | vnc_draw_y = y - viewport_y; |
| 97 | |
| 98 | /* if(vnc_draw_y & 1) { |
| 99 | return; |
| 100 | } else { |
| 101 | vnc_draw_y /= 2; |
| 102 | }*/ |
| 103 | |
| 104 | |
| 105 | |
| 106 | if(vnc_draw_y >= VNC_CONF_VIEWPORT_HEIGHT || |
| 107 | vnc_draw_x >= VNC_CONF_VIEWPORT_WIDTH) { |
| 108 | return; |
| 109 | } |
| 110 | |
| 111 | vnc_draw_datalen = datalen; |
| 112 | |
| 113 | if(vnc_draw_datalen + vnc_draw_x >= VNC_CONF_VIEWPORT_WIDTH) { |
| 114 | vnc_draw_datalen = VNC_CONF_VIEWPORT_WIDTH - vnc_draw_x; |
| 115 | if(vnc_draw_datalen == 0) { |
| 116 | return; |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | vnc_draw_dataptr = data; |
| 121 | |
| 122 | /* vnc_draw_bitmapptr = bitmaptab[vnc_draw_y] + |
| 123 | (vnc_draw_x & 0x1f8);*/ |
| 124 | |
| 125 | for(; vnc_draw_datalen > 0; --vnc_draw_datalen) { |
| 126 | /* vnc_draw_pixel(vnc_draw_x, vnc_draw_y, |
| 127 | conv[*vnc_draw_dataptr]);*/ |
| 128 | |
| 129 | bitmapptr = bitmapptrtab[vnc_draw_y] + (vnc_draw_x & 0x1f8); |
| 130 | |
| 131 | if(conv[*vnc_draw_dataptr]) { |
| 132 | o = oratab[vnc_draw_x & 7]; |
| 133 | *bitmapptr = *bitmapptr | o; |
| 134 | } else { |
| 135 | a = andtab[vnc_draw_x & 7]; |
| 136 | *bitmapptr = *bitmapptr & a; |
| 137 | } |
| 138 | ++vnc_draw_dataptr; |
| 139 | ++vnc_draw_x; |
| 140 | } |
| 141 | } |
| 142 | /*-----------------------------------------------------------------------------------*/ |
| 143 | void |
| 144 | vnc_draw_init(void) |
| 145 | { |
| 146 | unsigned int tmp; |
| 147 | unsigned int i; |
| 148 | unsigned short ptr; |
| 149 | |
| 150 | |
| 151 | /* Create color conversion table. */ |
| 152 | for(i = 0; i < 256; ++i) { |
| 153 | if(((i & 0xc0) > 0xc0) || |
| 154 | ((i & 0x38) > 0x18) || |
| 155 | ((i & 0x07) > 0x03)) { |
| 156 | conv[i] = 0; |
| 157 | } else { |
| 158 | conv[i] = 1; |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | memset(vnc_draw_bitmap, 0, sizeof(vnc_draw_bitmap)); |
| 163 | |
| 164 | for(i = 0; i < VNC_CONF_VIEWPORT_HEIGHT; ++i) { |
| 165 | bitmapptrtab[i] = (u8_t *)((u16_t)vnc_draw_bitmap + |
| 166 | ((i & 0xfff8)/8) * VNC_CONF_VIEWPORT_WIDTH + |
| 167 | (i & 7)); |
| 168 | } |
| 169 | |
| 170 | viewport_x = 0; |
| 171 | viewport_y = 0; |
| 172 | |
| 173 | viewport_w = VNC_CONF_VIEWPORT_WIDTH; |
| 174 | viewport_h = VNC_CONF_VIEWPORT_HEIGHT; |
| 175 | |
| 176 | return; |
| 177 | } |
| 178 | /*-----------------------------------------------------------------------------------*/ |
| 179 | u16_t |
| 180 | vnc_draw_viewport_x(void) |
| 181 | { |
| 182 | return viewport_x; |
| 183 | } |
| 184 | /*-----------------------------------------------------------------------------------*/ |
| 185 | u16_t |
| 186 | vnc_draw_viewport_y(void) |
| 187 | { |
| 188 | return viewport_y; |
| 189 | } |
| 190 | /*-----------------------------------------------------------------------------------*/ |
| 191 | u16_t |
| 192 | vnc_draw_viewport_w(void) |
| 193 | { |
| 194 | return viewport_w; |
| 195 | } |
| 196 | /*-----------------------------------------------------------------------------------*/ |
| 197 | u16_t |
| 198 | vnc_draw_viewport_h(void) |
| 199 | { |
| 200 | return viewport_h; |
| 201 | } |
| 202 | /*-----------------------------------------------------------------------------------*/ |
| 203 | #if 0 |
| 204 | signed short |
| 205 | c64_mouse_x(void) |
| 206 | { |
| 207 | return 0; |
| 208 | } |
| 209 | /*-----------------------------------------------------------------------------------*/ |
| 210 | signed short |
| 211 | c64_mouse_y(void) |
| 212 | { |
| 213 | return 0; |
| 214 | } |
| 215 | /*-----------------------------------------------------------------------------------*/ |
| 216 | u8_t |
| 217 | c64_mouse_buttons(void) |
| 218 | { |
| 219 | return firebutton; |
| 220 | } |
| 221 | /*-----------------------------------------------------------------------------------*/ |
| 222 | void |
| 223 | c64_set_mouse_x(unsigned short x) |
| 224 | { |
| 225 | joyx = x; |
| 226 | } |
| 227 | /*-----------------------------------------------------------------------------------*/ |
| 228 | void |
| 229 | c64_set_mouse_y(unsigned short y) |
| 230 | { |
| 231 | joyy = y; |
| 232 | } |
| 233 | /*-----------------------------------------------------------------------------------*/ |
| 234 | void |
| 235 | c64_set_viewport_x(unsigned short x) |
| 236 | { |
| 237 | viewport_x = x; |
| 238 | } |
| 239 | /*-----------------------------------------------------------------------------------*/ |
| 240 | void |
| 241 | c64_set_viewport_y(unsigned short y) |
| 242 | { |
| 243 | viewport_y = y; |
| 244 | } |
| 245 | /*-----------------------------------------------------------------------------------*/ |
| 246 | |
| 247 | #endif /* 0 */ |
| 248 | #if 0 |
oliverschmidt | a5b57db | 2004-07-18 13:23:28 +0000 | [diff] [blame] | 249 | #pragma optimize(push, off) |
adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 250 | void |
| 251 | c64_scroll_up(unsigned char c) |
| 252 | { |
| 253 | asm("lda $f7"); |
| 254 | asm("pha"); |
| 255 | asm("lda $f8"); |
| 256 | asm("pha"); |
| 257 | asm("lda $f9"); |
| 258 | asm("pha"); |
| 259 | asm("lda $fa"); |
| 260 | asm("pha"); |
| 261 | asm("lda $fb"); |
| 262 | asm("pha"); |
| 263 | asm("lda $fc"); |
| 264 | asm("pha"); |
| 265 | asm("lda $fd"); |
| 266 | asm("pha"); |
| 267 | asm("lda $fe"); |
| 268 | asm("pha"); |
| 269 | |
| 270 | asm("lda $01"); |
| 271 | asm("pha"); |
| 272 | asm("lda #$35"); |
| 273 | asm("sta $01"); |
| 274 | |
| 275 | asm("lda #$80"); |
| 276 | asm("sta $f7"); |
| 277 | asm("lda #$a2"); |
| 278 | asm("sta $f8"); |
| 279 | asm("lda #$00"); |
| 280 | asm("sta $f9"); |
| 281 | asm("lda #$a0"); |
| 282 | asm("sta $fa"); |
| 283 | |
| 284 | asm("lda #$80"); |
| 285 | asm("sta $fb"); |
| 286 | asm("lda #$e2"); |
| 287 | asm("sta $fc"); |
| 288 | asm("lda #$00"); |
| 289 | asm("sta $fd"); |
| 290 | asm("lda #$e0"); |
| 291 | asm("sta $fe"); |
| 292 | |
| 293 | asm("ldy #0"); |
| 294 | asm("loop:"); |
| 295 | asm("lda ($f7),y"); |
| 296 | asm("sta ($f9),y"); |
| 297 | asm("lda ($fb),y"); |
| 298 | asm("sta ($fd),y"); |
| 299 | asm("iny"); |
| 300 | asm("bne loop"); |
| 301 | |
| 302 | asm("inc $f8"); |
| 303 | asm("inc $fa"); |
| 304 | asm("inc $fc"); |
| 305 | asm("inc $fe"); |
| 306 | |
| 307 | asm("lda $fc"); |
| 308 | asm("cmp #$00"); |
| 309 | asm("bne loop"); |
| 310 | |
| 311 | asm("ldy #0"); |
| 312 | asm("lda #0"); |
| 313 | asm("sta $fe00,y"); |
| 314 | asm("sta $be00,y"); |
| 315 | asm("sta $fcc0,y"); |
| 316 | asm("sta $bcc0,y"); |
| 317 | asm("iny"); |
| 318 | asm("bne *-13"); |
| 319 | asm("sta $ff00,y"); |
| 320 | asm("sta $bf00,y"); |
| 321 | asm("sta $fdc0,y"); |
| 322 | asm("sta $bdc0,y"); |
| 323 | asm("iny"); |
| 324 | asm("cpy #$40"); |
| 325 | asm("bne *-15"); |
| 326 | |
| 327 | |
| 328 | asm("pla"); |
| 329 | asm("sta $01"); |
| 330 | asm("pla"); |
| 331 | asm("sta $fe"); |
| 332 | asm("pla"); |
| 333 | asm("sta $fd"); |
| 334 | asm("pla"); |
| 335 | asm("sta $fc"); |
| 336 | asm("pla"); |
| 337 | asm("sta $fb"); |
| 338 | asm("pla"); |
| 339 | asm("sta $fa"); |
| 340 | asm("pla"); |
| 341 | asm("sta $f9"); |
| 342 | asm("pla"); |
| 343 | asm("sta $f8"); |
| 344 | asm("pla"); |
| 345 | asm("sta $f7"); |
| 346 | } |
oliverschmidt | a5b57db | 2004-07-18 13:23:28 +0000 | [diff] [blame] | 347 | #pragma optimize(pop) |
adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 348 | /*-----------------------------------------------------------------------------------*/ |
oliverschmidt | a5b57db | 2004-07-18 13:23:28 +0000 | [diff] [blame] | 349 | #pragma optimize(push, off) |
adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 350 | void |
| 351 | c64_scroll_down(unsigned char c) |
| 352 | { |
| 353 | asm("lda $f7"); |
| 354 | asm("pha"); |
| 355 | asm("lda $f8"); |
| 356 | asm("pha"); |
| 357 | asm("lda $f9"); |
| 358 | asm("pha"); |
| 359 | asm("lda $fa"); |
| 360 | asm("pha"); |
| 361 | asm("lda $fb"); |
| 362 | asm("pha"); |
| 363 | asm("lda $fc"); |
| 364 | asm("pha"); |
| 365 | asm("lda $fd"); |
| 366 | asm("pha"); |
| 367 | asm("lda $fe"); |
| 368 | asm("pha"); |
| 369 | |
| 370 | |
| 371 | asm("lda $01"); |
| 372 | asm("pha"); |
| 373 | asm("lda #$35"); |
| 374 | asm("sta $01"); |
| 375 | |
| 376 | asm("lda #$c0"); |
| 377 | asm("sta $fb"); |
| 378 | asm("lda #$fb"); |
| 379 | asm("sta $fc"); |
| 380 | asm("lda #$40"); |
| 381 | asm("sta $fd"); |
| 382 | asm("lda #$fe"); |
| 383 | asm("sta $fe"); |
| 384 | |
| 385 | asm("lda #$c0"); |
| 386 | asm("sta $f7"); |
| 387 | asm("lda #$bb"); |
| 388 | asm("sta $f8"); |
| 389 | asm("lda #$40"); |
| 390 | asm("sta $f9"); |
| 391 | asm("lda #$be"); |
| 392 | asm("sta $fa"); |
| 393 | |
| 394 | |
| 395 | asm("ldy #0"); |
| 396 | asm("loop:"); |
| 397 | asm("lda ($fb),y"); |
| 398 | asm("sta ($fd),y"); |
| 399 | asm("lda ($f7),y"); |
| 400 | asm("sta ($f9),y"); |
| 401 | asm("iny"); |
| 402 | asm("bne loop"); |
| 403 | |
| 404 | asm("dec $f8"); |
| 405 | asm("dec $fa"); |
| 406 | asm("dec $fc"); |
| 407 | asm("dec $fe"); |
| 408 | |
| 409 | |
| 410 | asm("lda $fe"); |
| 411 | asm("cmp #$df"); |
| 412 | asm("bne loop"); |
| 413 | |
| 414 | asm("ldy #0"); |
| 415 | asm("lda #0"); |
| 416 | asm("sta $e000,y"); |
| 417 | asm("sta $a000,y"); |
| 418 | asm("sta $e140,y"); |
| 419 | asm("sta $a140,y"); |
| 420 | asm("iny"); |
| 421 | asm("bne *-13"); |
| 422 | asm("sta $e100,y"); |
| 423 | asm("sta $a100,y"); |
| 424 | asm("sta $e240,y"); |
| 425 | asm("sta $a240,y"); |
| 426 | asm("iny"); |
| 427 | asm("cpy #$40"); |
| 428 | asm("bne *-15"); |
| 429 | |
| 430 | asm("pla"); |
| 431 | asm("sta $01"); |
| 432 | asm("pla"); |
| 433 | asm("sta $fe"); |
| 434 | asm("pla"); |
| 435 | asm("sta $fd"); |
| 436 | asm("pla"); |
| 437 | asm("sta $fc"); |
| 438 | asm("pla"); |
| 439 | asm("sta $fb"); |
| 440 | asm("pla"); |
| 441 | asm("sta $fa"); |
| 442 | asm("pla"); |
| 443 | asm("sta $f9"); |
| 444 | asm("pla"); |
| 445 | asm("sta $f8"); |
| 446 | asm("pla"); |
| 447 | asm("sta $f7"); |
| 448 | } |
oliverschmidt | a5b57db | 2004-07-18 13:23:28 +0000 | [diff] [blame] | 449 | #pragma optimize(pop) |
adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 450 | /*-----------------------------------------------------------------------------------*/ |
oliverschmidt | a5b57db | 2004-07-18 13:23:28 +0000 | [diff] [blame] | 451 | #pragma optimize(push, off) |
adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 452 | void |
| 453 | c64_scroll_right(unsigned char c) |
| 454 | { |
| 455 | asm("lda $f7"); |
| 456 | asm("pha"); |
| 457 | asm("lda $f8"); |
| 458 | asm("pha"); |
| 459 | asm("lda $f9"); |
| 460 | asm("pha"); |
| 461 | asm("lda $fa"); |
| 462 | asm("pha"); |
| 463 | asm("lda $fb"); |
| 464 | asm("pha"); |
| 465 | asm("lda $fc"); |
| 466 | asm("pha"); |
| 467 | asm("lda $fd"); |
| 468 | asm("pha"); |
| 469 | asm("lda $fe"); |
| 470 | asm("pha"); |
| 471 | |
| 472 | |
| 473 | asm("lda $01"); |
| 474 | asm("pha"); |
| 475 | asm("lda #$35"); |
| 476 | asm("sta $01"); |
| 477 | |
| 478 | asm("lda #$00"); |
| 479 | asm("sta $f7"); |
| 480 | asm("lda #$a0"); |
| 481 | asm("sta $f8"); |
| 482 | asm("lda #$10"); |
| 483 | asm("sta $f9"); |
| 484 | asm("lda #$a0"); |
| 485 | asm("sta $fa"); |
| 486 | |
| 487 | asm("lda #$00"); |
| 488 | asm("sta $fb"); |
| 489 | asm("lda #$e0"); |
| 490 | asm("sta $fc"); |
| 491 | asm("lda #$10"); |
| 492 | asm("sta $fd"); |
| 493 | asm("lda #$e0"); |
| 494 | asm("sta $fe"); |
| 495 | |
| 496 | asm("ldx #0"); |
| 497 | |
| 498 | asm("loop3:"); |
| 499 | |
| 500 | asm("ldy #$ff"); |
| 501 | asm("loop:"); |
| 502 | asm("lda ($f7),y"); |
| 503 | asm("sta ($f9),y"); |
| 504 | asm("lda ($fb),y"); |
| 505 | asm("sta ($fd),y"); |
| 506 | asm("dey"); |
| 507 | asm("cpy #$ff"); |
| 508 | asm("bne loop"); |
| 509 | |
| 510 | asm("inc $f8"); |
| 511 | asm("inc $fa"); |
| 512 | asm("inc $fc"); |
| 513 | asm("inc $fe"); |
| 514 | |
| 515 | asm("ldy #$30"); |
| 516 | asm("loop2:"); |
| 517 | asm("lda ($f7),y"); |
| 518 | asm("sta ($f9),y"); |
| 519 | asm("lda ($fb),y"); |
| 520 | asm("sta ($fd),y"); |
| 521 | asm("dey"); |
| 522 | asm("cpy #$ff"); |
| 523 | asm("bne loop2"); |
| 524 | |
| 525 | asm("lda $f7"); |
| 526 | asm("clc"); |
| 527 | asm("adc #$40"); |
| 528 | asm("sta $f7"); |
| 529 | asm("sta $fb"); |
| 530 | asm("bcc :+"); |
| 531 | asm("inc $f8"); |
| 532 | asm("inc $fc"); |
| 533 | asm(":"); |
| 534 | |
| 535 | asm("lda $f9"); |
| 536 | asm("clc"); |
| 537 | asm("adc #$40"); |
| 538 | asm("sta $f9"); |
| 539 | asm("sta $fd"); |
| 540 | asm("bcc :+"); |
| 541 | asm("inc $fa"); |
| 542 | asm("inc $fe"); |
| 543 | asm(":"); |
| 544 | |
| 545 | |
| 546 | |
| 547 | asm("inx"); |
| 548 | asm("cpx #24"); |
| 549 | asm("bne loop3"); |
| 550 | |
| 551 | asm("pla"); |
| 552 | asm("sta $01"); |
| 553 | asm("pla"); |
| 554 | asm("sta $fe"); |
| 555 | asm("pla"); |
| 556 | asm("sta $fd"); |
| 557 | asm("pla"); |
| 558 | asm("sta $fc"); |
| 559 | asm("pla"); |
| 560 | asm("sta $fb"); |
| 561 | asm("pla"); |
| 562 | asm("sta $fa"); |
| 563 | asm("pla"); |
| 564 | asm("sta $f9"); |
| 565 | asm("pla"); |
| 566 | asm("sta $f8"); |
| 567 | asm("pla"); |
| 568 | asm("sta $f7"); |
| 569 | } |
oliverschmidt | a5b57db | 2004-07-18 13:23:28 +0000 | [diff] [blame] | 570 | #pragma optimize(pop) |
adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 571 | /*-----------------------------------------------------------------------------------*/ |
oliverschmidt | a5b57db | 2004-07-18 13:23:28 +0000 | [diff] [blame] | 572 | #pragma optimize(push, off) |
adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 573 | void |
| 574 | c64_scroll_left(unsigned char c) |
| 575 | { |
| 576 | asm("lda $f7"); |
| 577 | asm("pha"); |
| 578 | asm("lda $f8"); |
| 579 | asm("pha"); |
| 580 | asm("lda $f9"); |
| 581 | asm("pha"); |
| 582 | asm("lda $fa"); |
| 583 | asm("pha"); |
| 584 | asm("lda $fb"); |
| 585 | asm("pha"); |
| 586 | asm("lda $fc"); |
| 587 | asm("pha"); |
| 588 | asm("lda $fd"); |
| 589 | asm("pha"); |
| 590 | asm("lda $fe"); |
| 591 | asm("pha"); |
| 592 | |
| 593 | |
| 594 | asm("lda $01"); |
| 595 | asm("pha"); |
| 596 | asm("lda #$35"); |
| 597 | asm("sta $01"); |
| 598 | |
| 599 | asm("lda #$10"); |
| 600 | asm("sta $f7"); |
| 601 | asm("lda #$a0"); |
| 602 | asm("sta $f8"); |
| 603 | asm("lda #$00"); |
| 604 | asm("sta $f9"); |
| 605 | asm("lda #$a0"); |
| 606 | asm("sta $fa"); |
| 607 | |
| 608 | asm("lda #$10"); |
| 609 | asm("sta $fb"); |
| 610 | asm("lda #$e0"); |
| 611 | asm("sta $fc"); |
| 612 | asm("lda #$00"); |
| 613 | asm("sta $fd"); |
| 614 | asm("lda #$e0"); |
| 615 | asm("sta $fe"); |
| 616 | |
| 617 | asm("ldx #0"); |
| 618 | asm("loop3:"); |
| 619 | asm("ldy #0"); |
| 620 | asm("loop:"); |
| 621 | asm("lda ($f7),y"); |
| 622 | asm("sta ($f9),y"); |
| 623 | asm("lda ($fb),y"); |
| 624 | asm("sta ($fd),y"); |
| 625 | asm("iny"); |
| 626 | asm("bne loop"); |
| 627 | |
| 628 | asm("inc $f8"); |
| 629 | asm("inc $fa"); |
| 630 | asm("inc $fc"); |
| 631 | asm("inc $fe"); |
| 632 | |
| 633 | asm("ldy #0"); |
| 634 | asm("loop2:"); |
| 635 | asm("lda ($f7),y"); |
| 636 | asm("sta ($f9),y"); |
| 637 | asm("lda ($fb),y"); |
| 638 | asm("sta ($fd),y"); |
| 639 | asm("iny"); |
| 640 | asm("cpy #$30"); |
| 641 | asm("bne loop2"); |
| 642 | |
| 643 | asm("lda $f7"); |
| 644 | asm("clc"); |
| 645 | asm("adc #$40"); |
| 646 | asm("sta $f7"); |
| 647 | asm("sta $fb"); |
| 648 | asm("bcc :+"); |
| 649 | asm("inc $f8"); |
| 650 | asm("inc $fc"); |
| 651 | asm(":"); |
| 652 | |
| 653 | asm("lda $f9"); |
| 654 | asm("clc"); |
| 655 | asm("adc #$40"); |
| 656 | asm("sta $f9"); |
| 657 | asm("sta $fd"); |
| 658 | asm("bcc :+"); |
| 659 | asm("inc $fa"); |
| 660 | asm("inc $fe"); |
| 661 | asm(":"); |
| 662 | |
| 663 | |
| 664 | asm("inx"); |
| 665 | asm("cpx #24"); |
| 666 | asm("bne loop3"); |
| 667 | |
| 668 | asm("pla"); |
| 669 | asm("sta $01"); |
| 670 | asm("pla"); |
| 671 | asm("sta $fe"); |
| 672 | asm("pla"); |
| 673 | asm("sta $fd"); |
| 674 | asm("pla"); |
| 675 | asm("sta $fc"); |
| 676 | asm("pla"); |
| 677 | asm("sta $fb"); |
| 678 | asm("pla"); |
| 679 | asm("sta $fa"); |
| 680 | asm("pla"); |
| 681 | asm("sta $f9"); |
| 682 | asm("pla"); |
| 683 | asm("sta $f8"); |
| 684 | asm("pla"); |
| 685 | asm("sta $f7"); |
| 686 | } |
oliverschmidt | a5b57db | 2004-07-18 13:23:28 +0000 | [diff] [blame] | 687 | #pragma optimize(pop) |
adamdunkels | 4fa940f | 2003-04-11 20:30:14 +0000 | [diff] [blame] | 688 | /*-----------------------------------------------------------------------------------*/ |
| 689 | |
| 690 | |
| 691 | |
| 692 | #endif /* 0 */ |