1 EESchema Schematic File Version 4 2 LIBS:AcornElectronMainboard-cache 3 EELAYER 26 0 4 EELAYER END 5 $Descr A4 8268 11693 portrait 6 encoding utf-8 7 Sheet 1 11 8 Title "Acorn Electron Mainboard" 9 Date "" 10 Rev "" 11 Comp "" 12 Comment1 "" 13 Comment2 "" 14 Comment3 "" 15 Comment4 "" 16 $EndDescr 17 $Comp 18 L AcornElectron:ULA12C021 IC1 19 U 1 1 61CC86CA 20 P 4300 4100 21 F 0 "IC1" H 4300 6750 50 0000 C CNN 22 F 1 "ULA12C021" H 4300 6650 50 0000 C CNN 23 F 2 "" H 4300 4100 50 0001 C CNN 24 F 3 "" H 4300 4100 50 0001 C CNN 25 1 4300 4100 26 1 0 0 -1 27 $EndComp 28 Text Label 2900 3900 2 50 ~ 0 29 A0 30 Text Label 2900 4300 2 50 ~ 0 31 A4 32 Text Label 2900 4400 2 50 ~ 0 33 A5 34 Text Label 2900 4500 2 50 ~ 0 35 A6 36 Text Label 2900 4600 2 50 ~ 0 37 A7 38 Text Label 2900 4700 2 50 ~ 0 39 A8 40 Text Label 2900 4800 2 50 ~ 0 41 A9 42 Text Label 2900 4900 2 50 ~ 0 43 A10 44 Text Label 2900 5000 2 50 ~ 0 45 A11 46 Text Label 2900 5100 2 50 ~ 0 47 A12 48 Text Label 2900 5200 2 50 ~ 0 49 A13 50 Text Label 2900 5300 2 50 ~ 0 51 A14 52 Text Label 2900 4000 2 50 ~ 0 53 A1 54 Text Label 2900 4100 2 50 ~ 0 55 A2 56 Text Label 2900 4200 2 50 ~ 0 57 A3 58 Text Label 2900 5400 2 50 ~ 0 59 A15 60 Wire Bus Line 61 1700 3800 2100 3800 62 Entry Wire Line 63 2100 3800 2200 3900 64 Entry Wire Line 65 2100 4000 2200 4100 66 Entry Wire Line 67 2100 4100 2200 4200 68 Entry Wire Line 69 2100 4200 2200 4300 70 Entry Wire Line 71 2100 4300 2200 4400 72 Entry Wire Line 73 2100 4400 2200 4500 74 Entry Wire Line 75 2100 4500 2200 4600 76 Entry Wire Line 77 2100 4600 2200 4700 78 Entry Wire Line 79 2100 4700 2200 4800 80 Entry Wire Line 81 2100 4800 2200 4900 82 Entry Wire Line 83 2100 4900 2200 5000 84 Entry Wire Line 85 2100 5000 2200 5100 86 Entry Wire Line 87 2100 5100 2200 5200 88 Entry Wire Line 89 2100 5200 2200 5300 90 Entry Wire Line 91 2100 5300 2200 5400 92 Entry Wire Line 93 2100 3900 2200 4000 94 Wire Wire Line 95 2200 3900 2900 3900 96 Wire Wire Line 97 2200 4000 2900 4000 98 Wire Wire Line 99 2200 4100 2900 4100 100 Wire Wire Line 101 2200 4200 2900 4200 102 Wire Wire Line 103 2200 4300 2900 4300 104 Wire Wire Line 105 2200 4400 2900 4400 106 Wire Wire Line 107 2200 4500 2900 4500 108 Wire Wire Line 109 2200 4600 2900 4600 110 Wire Wire Line 111 2200 4700 2900 4700 112 Wire Wire Line 113 2200 4800 2900 4800 114 Wire Wire Line 115 2200 4900 2900 4900 116 Wire Wire Line 117 2200 5000 2900 5000 118 Wire Wire Line 119 2200 5100 2900 5100 120 Wire Wire Line 121 2200 5200 2900 5200 122 Wire Wire Line 123 2200 5300 2900 5300 124 Entry Wire Line 125 2100 2300 2200 2400 126 Entry Wire Line 127 2100 2400 2200 2500 128 Entry Wire Line 129 2100 2500 2200 2600 130 Entry Wire Line 131 2100 2600 2200 2700 132 Entry Wire Line 133 2100 2700 2200 2800 134 Entry Wire Line 135 2100 2800 2200 2900 136 Entry Wire Line 137 2100 2900 2200 3000 138 Entry Wire Line 139 2100 3000 2200 3100 140 Wire Wire Line 141 2200 2400 2900 2400 142 Wire Wire Line 143 2200 2500 2900 2500 144 Wire Wire Line 145 2200 2600 2900 2600 146 Wire Wire Line 147 2200 2700 2900 2700 148 Wire Wire Line 149 2200 2800 2900 2800 150 Wire Wire Line 151 2200 2900 2900 2900 152 Wire Wire Line 153 2200 3000 2900 3000 154 Wire Wire Line 155 2200 3100 2900 3100 156 Text Label 2900 2400 2 50 ~ 0 157 RA0 158 Text Label 2900 2500 2 50 ~ 0 159 RA1 160 Text Label 2900 2600 2 50 ~ 0 161 RA2 162 Text Label 2900 2700 2 50 ~ 0 163 RA3 164 Text Label 2900 2800 2 50 ~ 0 165 RA4 166 Text Label 2900 2900 2 50 ~ 0 167 RA5 168 Text Label 2900 3000 2 50 ~ 0 169 RA6 170 Text Label 2900 3100 2 50 ~ 0 171 RA7 172 Wire Wire Line 173 2300 2100 2900 2100 174 Wire Wire Line 175 2500 2200 2900 2200 176 Text Label 2900 2100 2 50 ~ 0 177 ~WE 178 Text Label 2900 2200 2 50 ~ 0 179 ~RAS 180 Text Label 2900 2300 2 50 ~ 0 181 ~CAS 182 Wire Wire Line 183 2200 2000 2900 2000 184 Wire Wire Line 185 2900 1900 2200 1900 186 Wire Wire Line 187 2900 1800 2200 1800 188 Wire Wire Line 189 2900 1700 2200 1700 190 Entry Wire Line 191 2100 1600 2200 1700 192 Entry Wire Line 193 2100 1700 2200 1800 194 Entry Wire Line 195 2100 1800 2200 1900 196 Entry Wire Line 197 2100 1900 2200 2000 198 Text Label 2900 1700 2 50 ~ 0 199 RAM0 200 Text Label 2900 1800 2 50 ~ 0 201 RAM1 202 Text Label 2900 1900 2 50 ~ 0 203 RAM2 204 Text Label 2900 2000 2 50 ~ 0 205 RAM3 206 Text Label 2900 5500 2 50 ~ 0 207 D0 208 Text Label 2900 5600 2 50 ~ 0 209 D1 210 Text Label 2900 5700 2 50 ~ 0 211 D2 212 Text Label 2900 5800 2 50 ~ 0 213 D3 214 Text Label 2900 5900 2 50 ~ 0 215 D4 216 Text Label 2900 6000 2 50 ~ 0 217 D5 218 Text Label 2900 6100 2 50 ~ 0 219 D6 220 Text Label 2900 6200 2 50 ~ 0 221 D7 222 Wire Wire Line 223 2900 3800 2300 3800 224 Wire Wire Line 225 2300 3800 2300 3700 226 Entry Wire Line 227 2100 3100 2200 3200 228 Entry Wire Line 229 2100 3200 2200 3300 230 Entry Wire Line 231 2100 3300 2200 3400 232 Entry Wire Line 233 2100 3400 2200 3500 234 Wire Wire Line 235 2200 3200 2900 3200 236 Wire Wire Line 237 2200 3300 2900 3300 238 Wire Wire Line 239 2200 3400 2900 3400 240 Wire Wire Line 241 2200 3500 2900 3500 242 Text GLabel 3800 7100 3 50 Input ~ 0 243 0V 244 Wire Wire Line 245 3800 7100 3800 6900 246 Wire Wire Line 247 3800 6900 4000 6900 248 Wire Wire Line 249 4000 6900 4000 6750 250 Connection ~ 3800 6900 251 Wire Wire Line 252 3800 6900 3800 6750 253 Text GLabel 3600 700 1 50 Input ~ 0 254 5V 255 Wire Wire Line 256 3600 700 3600 800 257 $Comp 258 L Device:R R5 259 U 1 1 61F10DD6 260 P 3800 1050 261 F 0 "R5" H 3650 1100 50 0000 L CNN 262 F 1 "24R" H 3750 1000 50 0000 R CNN 263 F 2 "" V 3730 1050 50 0001 C CNN 264 F 3 "~" H 3800 1050 50 0001 C CNN 265 1 3800 1050 266 1 0 0 -1 267 $EndComp 268 $Comp 269 L Device:R R58 270 U 1 1 61F10E39 271 P 4000 1050 272 F 0 "R58" H 4050 1100 50 0000 L CNN 273 F 1 "24R" H 4050 1000 50 0000 L CNN 274 F 2 "" V 3930 1050 50 0001 C CNN 275 F 3 "~" H 4000 1050 50 0001 C CNN 276 1 4000 1050 277 1 0 0 -1 278 $EndComp 279 Wire Wire Line 280 3800 1550 3800 1350 281 Wire Wire Line 282 3800 900 3800 800 283 Wire Wire Line 284 3800 800 3600 800 285 Connection ~ 3600 800 286 Wire Wire Line 287 3600 800 3600 1550 288 Wire Wire Line 289 4000 800 3800 800 290 Connection ~ 3800 800 291 $Comp 292 L Device:C C27 293 U 1 1 61FBBBB4 294 P 3350 1250 295 F 0 "C27" H 3250 1300 50 0000 R CNN 296 F 1 "10??F/TANT" H 3250 1200 38 0000 R CNN 297 F 2 "" H 3388 1100 50 0001 C CNN 298 F 3 "~" H 3350 1250 50 0001 C CNN 299 1 3350 1250 300 1 0 0 -1 301 $EndComp 302 Wire Wire Line 303 3600 800 3350 800 304 Wire Wire Line 305 3350 800 3350 1100 306 Text GLabel 3250 1500 0 50 Input ~ 0 307 0V 308 Wire Wire Line 309 3250 1500 3350 1500 310 Wire Wire Line 311 3350 1500 3350 1400 312 Wire Wire Line 313 3600 6750 3600 7400 314 Wire Wire Line 315 3600 7400 3500 7400 316 Wire Wire Line 317 4600 7600 4600 6750 318 $Sheet 319 S 2800 8300 700 300 320 U 61DF4BC2 321 F0 "Clocks" 50 322 F1 "clocks.sch" 50 323 $EndSheet 324 Text GLabel 3500 7600 0 50 Input ~ 0 325 CLOCK_16MHz 326 Text GLabel 3500 7400 0 50 Input ~ 0 327 CLOCK_16MHz_DIV_13 328 $Sheet 329 S 1200 900 700 300 330 U 61D7EEE8 331 F0 "RAM" 50 332 F1 "RAM.sch" 50 333 $EndSheet 334 Wire Bus Line 335 2100 2300 1700 2300 336 Text GLabel 1700 1600 0 50 BiDi ~ 0 337 RAM[0..3] 338 Text GLabel 1700 2300 0 50 Output ~ 0 339 RA[0..7] 340 $Sheet 341 S 6700 900 700 300 342 U 624B50A6 343 F0 "Cassette" 50 344 F1 "cassette.sch" 50 345 $EndSheet 346 Text GLabel 5800 3600 2 50 Input ~ 0 347 CASSETTE_INPUT 348 Wire Wire Line 349 5600 3600 5800 3600 350 Text GLabel 5800 1800 2 50 Output ~ 0 351 CASSETTE_OUTPUT 352 Wire Wire Line 353 5600 1800 5800 1800 354 $Sheet 355 S 6700 4200 700 300 356 U 61E9B87F 357 F0 "Sound" 50 358 F1 "sound.sch" 50 359 $EndSheet 360 Text GLabel 5800 4700 2 50 Output ~ 0 361 SOUND_OUTPUT 362 Wire Wire Line 363 5600 4700 5800 4700 364 Wire Wire Line 365 3500 7600 4600 7600 366 Text GLabel 1700 6400 0 50 Output ~ 0 367 PHI_OUT 368 $Sheet 369 S 2800 8900 700 300 370 U 61FB7D7E 371 F0 "Expansion" 50 372 F1 "expansion.sch" 50 373 $EndSheet 374 Text GLabel 1700 5400 0 50 BiDi ~ 0 375 D[0..7] 376 Wire Bus Line 377 1700 5400 2100 5400 378 Text GLabel 1700 3800 0 50 Input ~ 0 379 A[0..15] 380 Text GLabel 1700 6600 0 50 Input ~ 0 381 RnW 382 Text GLabel 2000 6500 0 50 Output ~ 0 383 ~IRQ 384 Text GLabel 2000 6300 0 50 Input ~ 0 385 ~NMI 386 Text GLabel 2700 3700 0 50 Input ~ 0 387 ~RST 388 $Sheet 389 S 1300 8300 700 300 390 U 61F2273C 391 F0 "CPU, ROM, keyboard" 50 392 F1 "CPU_ROM_KBD.sch" 50 393 $EndSheet 394 Text GLabel 1700 3100 0 50 Input ~ 0 395 KBD[0..3] 396 Wire Bus Line 397 1700 3100 2100 3100 398 Wire Wire Line 399 2700 3700 2900 3700 400 Entry Wire Line 401 2100 5400 2200 5500 402 Entry Wire Line 403 2100 5500 2200 5600 404 Entry Wire Line 405 2100 5600 2200 5700 406 Entry Wire Line 407 2100 5700 2200 5800 408 Entry Wire Line 409 2100 5800 2200 5900 410 Entry Wire Line 411 2100 5900 2200 6000 412 Entry Wire Line 413 2100 6000 2200 6100 414 Entry Wire Line 415 2100 6100 2200 6200 416 Wire Wire Line 417 2200 5500 2900 5500 418 Wire Wire Line 419 2200 5600 2900 5600 420 Wire Wire Line 421 2200 5700 2900 5700 422 Wire Wire Line 423 2200 5800 2900 5800 424 Wire Wire Line 425 2200 5900 2900 5900 426 Wire Wire Line 427 2200 6000 2900 6000 428 Wire Wire Line 429 2200 6100 2900 6100 430 Wire Wire Line 431 2200 6200 2900 6200 432 Text GLabel 1700 3600 0 50 Input ~ 0 433 CAPS_LOCK 434 Wire Wire Line 435 2200 5400 2900 5400 436 Text GLabel 1000 3700 0 50 Output ~ 0 437 ROM 438 Wire Wire Line 439 1700 3600 2900 3600 440 Wire Wire Line 441 2300 3700 1000 3700 442 Wire Wire Line 443 2000 6300 2900 6300 444 Wire Wire Line 445 2000 6500 2900 6500 446 Wire Wire Line 447 1700 6600 2900 6600 448 Wire Wire Line 449 1700 6400 2900 6400 450 $Sheet 451 S 4300 8900 700 300 452 U 61DB955D 453 F0 "Video" 50 454 F1 "video.sch" 50 455 $EndSheet 456 Wire Wire Line 457 6300 5500 6200 5500 458 Wire Wire Line 459 6300 5100 6200 5100 460 Wire Wire Line 461 5800 5100 5900 5100 462 Wire Wire Line 463 5800 5500 5900 5500 464 Wire Wire Line 465 5800 5300 5800 5100 466 Wire Wire Line 467 5800 5300 5800 5500 468 Connection ~ 5800 5300 469 Wire Wire Line 470 5600 5300 5800 5300 471 Text GLabel 6300 5500 2 50 Input ~ 0 472 0V 473 $Comp 474 L Device:C C9 475 U 1 1 621AE941 476 P 6050 5500 477 F 0 "C9" V 5798 5500 50 0000 C CNN 478 F 1 "1??F/35V/TANT" V 5889 5500 38 0000 C CNN 479 F 2 "" H 6088 5350 50 0001 C CNN 480 F 3 "~" H 6050 5500 50 0001 C CNN 481 1 6050 5500 482 0 1 1 0 483 $EndComp 484 Text GLabel 6300 5100 2 50 Input ~ 0 485 5V 486 $Comp 487 L Device:R R7 488 U 1 1 61FA16A2 489 P 6050 5100 490 F 0 "R7" V 5843 5100 50 0000 C CNN 491 F 1 "56000R" V 5934 5100 50 0000 C CNN 492 F 2 "" V 5980 5100 50 0001 C CNN 493 F 3 "~" H 6050 5100 50 0001 C CNN 494 1 6050 5100 495 0 1 1 0 496 $EndComp 497 Text GLabel 7100 6100 2 50 Output ~ 0 498 ~CSYNC 499 Text GLabel 7100 6700 2 50 Output ~ 0 500 BLUE 501 Text GLabel 7100 7300 2 50 Output ~ 0 502 GREEN 503 Text GLabel 7100 7900 2 50 Output ~ 0 504 RED 505 Wire Wire Line 506 5600 5700 6100 5700 507 Text GLabel 4900 7000 2 50 Output ~ 0 508 ~HS 509 Wire Wire Line 510 4800 6750 4800 7000 511 Wire Wire Line 512 4800 7000 4900 7000 513 Text GLabel 5800 2300 2 50 BiDi ~ 0 514 CASSETTE_RC 515 Text GLabel 5800 2600 2 50 Output ~ 0 516 CASSETTE_MOTOR 517 Wire Wire Line 518 5600 2300 5800 2300 519 Wire Wire Line 520 5600 2600 5800 2600 521 $Sheet 522 S 4300 8300 700 300 523 U 62411C42 524 F0 "UHF" 50 525 F1 "UHF.sch" 50 526 $EndSheet 527 Wire Wire Line 528 5600 6300 5800 6300 529 Wire Wire Line 530 5600 5900 6000 5900 531 Text Notes 6100 9100 0 50 ~ 0 532 Issue 6 boards tend to have\nIC19 (74LS08) fitted for\nsome kind of buffering\nof the video signals.\n\nLK7 is supposedly connected\nto +5V to ensure this. 533 $Comp 534 L 74xx:74LS08 IC19 535 U 1 1 61E3E3E3 536 P 6700 7300 537 F 0 "IC19" H 6700 7625 50 0000 C CNN 538 F 1 "74LS08" H 6700 7534 50 0000 C CNN 539 F 2 "" H 6700 7300 50 0001 C CNN 540 F 3 "http://www.ti.com/lit/gpn/sn74LS08" H 6700 7300 50 0001 C CNN 541 1 6700 7300 542 1 0 0 -1 543 $EndComp 544 $Comp 545 L 74xx:74LS08 IC19 546 U 2 1 61E3E49E 547 P 6700 7900 548 F 0 "IC19" H 6700 8225 50 0000 C CNN 549 F 1 "74LS08" H 6700 8134 50 0000 C CNN 550 F 2 "" H 6700 7900 50 0001 C CNN 551 F 3 "http://www.ti.com/lit/gpn/sn74LS08" H 6700 7900 50 0001 C CNN 552 2 6700 7900 553 1 0 0 -1 554 $EndComp 555 $Comp 556 L 74xx:74LS08 IC19 557 U 3 1 61E3E509 558 P 6700 6100 559 F 0 "IC19" H 6700 6425 50 0000 C CNN 560 F 1 "74LS08" H 6700 6334 50 0000 C CNN 561 F 2 "" H 6700 6100 50 0001 C CNN 562 F 3 "http://www.ti.com/lit/gpn/sn74LS08" H 6700 6100 50 0001 C CNN 563 3 6700 6100 564 1 0 0 -1 565 $EndComp 566 $Comp 567 L 74xx:74LS08 IC19 568 U 4 1 61E3E573 569 P 6700 6700 570 F 0 "IC19" H 6700 7025 50 0000 C CNN 571 F 1 "74LS08" H 6700 6934 50 0000 C CNN 572 F 2 "" H 6700 6700 50 0001 C CNN 573 F 3 "http://www.ti.com/lit/gpn/sn74LS08" H 6700 6700 50 0001 C CNN 574 4 6700 6700 575 1 0 0 -1 576 $EndComp 577 Wire Wire Line 578 5800 6300 5800 7800 579 Wire Wire Line 580 5800 7800 6400 7800 581 Wire Wire Line 582 5900 6100 5900 7200 583 Wire Wire Line 584 5900 7200 6400 7200 585 Wire Wire Line 586 5600 6100 5900 6100 587 Wire Wire Line 588 6000 5900 6000 6800 589 Wire Wire Line 590 6000 6800 6400 6800 591 Wire Wire Line 592 6100 5700 6100 6200 593 Wire Wire Line 594 6100 6200 6400 6200 595 $Comp 596 L Jumper:Jumper_2_Bridged LK7 597 U 1 1 61EC346B 598 P 6600 8400 599 F 0 "LK7" H 6600 8595 50 0000 C CNN 600 F 1 "Jumper_2_Bridged" H 6600 8504 50 0000 C CNN 601 F 2 "" H 6600 8400 50 0001 C CNN 602 F 3 "~" H 6600 8400 50 0001 C CNN 603 1 6600 8400 604 1 0 0 -1 605 $EndComp 606 Wire Wire Line 607 6400 8000 6200 8000 608 Wire Wire Line 609 6200 8000 6200 8400 610 Wire Wire Line 611 6200 8400 6400 8400 612 Wire Wire Line 613 6200 8000 6200 7400 614 Wire Wire Line 615 6200 7400 6400 7400 616 Connection ~ 6200 8000 617 Wire Wire Line 618 6200 7400 6200 6600 619 Wire Wire Line 620 6200 6600 6400 6600 621 Connection ~ 6200 7400 622 Wire Wire Line 623 6200 6600 6200 6000 624 Wire Wire Line 625 6200 6000 6400 6000 626 Connection ~ 6200 6600 627 Wire Wire Line 628 7000 6100 7100 6100 629 Wire Wire Line 630 7000 6700 7100 6700 631 Wire Wire Line 632 7000 7300 7100 7300 633 Wire Wire Line 634 7000 7900 7100 7900 635 Text GLabel 6900 8400 2 50 Input ~ 0 636 5V 637 Wire Wire Line 638 6900 8400 6800 8400 639 Text GLabel 6100 8400 0 50 Output ~ 0 640 BUFFER_ENABLE 641 Wire Wire Line 642 6100 8400 6200 8400 643 Connection ~ 6200 8400 644 Text Label 2100 5400 2 50 ~ 0 645 D[0..7] 646 Text Label 2100 3800 2 50 ~ 0 647 A[0..15] 648 Text Label 2100 3100 2 50 ~ 0 649 KBD[0..3] 650 Text Label 2100 2300 2 50 ~ 0 651 RA[0..7] 652 Text GLabel 2300 2100 0 50 Output ~ 0 653 ~WE 654 Text GLabel 2500 2200 0 50 Output ~ 0 655 ~RAS 656 Text GLabel 2700 2300 0 50 Output ~ 0 657 ~CAS 658 Wire Wire Line 659 2900 2300 2700 2300 660 Text Label 2900 3200 2 50 ~ 0 661 KBD0 662 Text Label 2900 3300 2 50 ~ 0 663 KBD1 664 Text Label 2900 3400 2 50 ~ 0 665 KBD2 666 Text Label 2900 3500 2 50 ~ 0 667 KBD3 668 Wire Wire Line 669 4000 900 4000 800 670 Wire Wire Line 671 4000 1550 4000 1250 672 $Comp 673 L power:PWR_FLAG #FLG0106 674 U 1 1 62024979 675 P 4000 1250 676 F 0 "#FLG0106" H 4000 1325 50 0001 C CNN 677 F 1 "PWR_FLAG" V 4000 1378 50 0000 L CNN 678 F 2 "" H 4000 1250 50 0001 C CNN 679 F 3 "~" H 4000 1250 50 0001 C CNN 680 1 4000 1250 681 0 1 1 0 682 $EndComp 683 Connection ~ 4000 1250 684 Wire Wire Line 685 4000 1250 4000 1200 686 $Comp 687 L power:PWR_FLAG #FLG0107 688 U 1 1 620249E5 689 P 3800 1350 690 F 0 "#FLG0107" H 3800 1425 50 0001 C CNN 691 F 1 "PWR_FLAG" V 3800 1650 50 0000 L CNN 692 F 2 "" H 3800 1350 50 0001 C CNN 693 F 3 "~" H 3800 1350 50 0001 C CNN 694 1 3800 1350 695 0 1 1 0 696 $EndComp 697 Connection ~ 3800 1350 698 Wire Wire Line 699 3800 1350 3800 1200 700 Text Notes 4550 1400 0 50 ~ 0 701 Note that KiCad gets upset\nwhen connecting passives\nto power input pins. 702 Wire Bus Line 703 1700 1600 2100 1600 704 $Sheet 705 S 1300 8900 700 300 706 U 6460C88B 707 F0 "Power" 50 708 F1 "power.sch" 50 709 $EndSheet 710 Wire Bus Line 711 2100 1600 2100 1900 712 Wire Bus Line 713 2100 3100 2100 3400 714 Wire Bus Line 715 2100 2300 2100 3000 716 Wire Bus Line 717 2100 5400 2100 6100 718 Wire Bus Line 719 2100 3800 2100 5300 720 $Sheet 721 S 4300 9500 700 300 722 U 63E3F56E 723 F0 "CSYNC" 50 724 F1 "CSYNC.sch" 50 725 $EndSheet 726 $EndSCHEMATC