1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/AcornElectronMainboard.sch Wed Jan 26 22:13:42 2022 +0100
1.3 @@ -0,0 +1,831 @@
1.4 +EESchema Schematic File Version 4
1.5 +LIBS:AcornElectronMainboard-cache
1.6 +EELAYER 26 0
1.7 +EELAYER END
1.8 +$Descr A4 8268 11693 portrait
1.9 +encoding utf-8
1.10 +Sheet 1 9
1.11 +Title "Acorn Electron Mainboard"
1.12 +Date ""
1.13 +Rev ""
1.14 +Comp ""
1.15 +Comment1 ""
1.16 +Comment2 ""
1.17 +Comment3 ""
1.18 +Comment4 ""
1.19 +$EndDescr
1.20 +$Comp
1.21 +L AcornElectron:ULA12C021 IC1
1.22 +U 1 1 61CC86CA
1.23 +P 4300 4100
1.24 +F 0 "IC1" H 4300 6750 50 0000 C CNN
1.25 +F 1 "ULA12C021" H 4300 6650 50 0000 C CNN
1.26 +F 2 "" H 4300 4100 50 0001 C CNN
1.27 +F 3 "" H 4300 4100 50 0001 C CNN
1.28 + 1 4300 4100
1.29 + 1 0 0 -1
1.30 +$EndComp
1.31 +Text Label 2900 3900 2 50 ~ 0
1.32 +A0
1.33 +Text Label 2900 4300 2 50 ~ 0
1.34 +A4
1.35 +Text Label 2900 4400 2 50 ~ 0
1.36 +A5
1.37 +Text Label 2900 4500 2 50 ~ 0
1.38 +A6
1.39 +Text Label 2900 4600 2 50 ~ 0
1.40 +A7
1.41 +Text Label 2900 4700 2 50 ~ 0
1.42 +A8
1.43 +Text Label 2900 4800 2 50 ~ 0
1.44 +A9
1.45 +Text Label 2900 4900 2 50 ~ 0
1.46 +A10
1.47 +Text Label 2900 5000 2 50 ~ 0
1.48 +A11
1.49 +Text Label 2900 5100 2 50 ~ 0
1.50 +A12
1.51 +Text Label 2900 5200 2 50 ~ 0
1.52 +A13
1.53 +Text Label 2900 5300 2 50 ~ 0
1.54 +A14
1.55 +Text Label 2900 4000 2 50 ~ 0
1.56 +A1
1.57 +Text Label 2900 4100 2 50 ~ 0
1.58 +A2
1.59 +Text Label 2900 4200 2 50 ~ 0
1.60 +A3
1.61 +Text Label 2900 5400 2 50 ~ 0
1.62 +A15
1.63 +Wire Bus Line
1.64 + 2000 3800 2100 3800
1.65 +Entry Wire Line
1.66 + 2100 3800 2200 3900
1.67 +Entry Wire Line
1.68 + 2100 4000 2200 4100
1.69 +Entry Wire Line
1.70 + 2100 4100 2200 4200
1.71 +Entry Wire Line
1.72 + 2100 4200 2200 4300
1.73 +Entry Wire Line
1.74 + 2100 4300 2200 4400
1.75 +Entry Wire Line
1.76 + 2100 4400 2200 4500
1.77 +Entry Wire Line
1.78 + 2100 4500 2200 4600
1.79 +Entry Wire Line
1.80 + 2100 4600 2200 4700
1.81 +Entry Wire Line
1.82 + 2100 4700 2200 4800
1.83 +Entry Wire Line
1.84 + 2100 4800 2200 4900
1.85 +Entry Wire Line
1.86 + 2100 4900 2200 5000
1.87 +Entry Wire Line
1.88 + 2100 5000 2200 5100
1.89 +Entry Wire Line
1.90 + 2100 5100 2200 5200
1.91 +Entry Wire Line
1.92 + 2100 5200 2200 5300
1.93 +Entry Wire Line
1.94 + 2100 5300 2200 5400
1.95 +Entry Wire Line
1.96 + 2100 3900 2200 4000
1.97 +Wire Wire Line
1.98 + 2200 3900 2900 3900
1.99 +Wire Wire Line
1.100 + 2200 4000 2900 4000
1.101 +Wire Wire Line
1.102 + 2200 4100 2900 4100
1.103 +Wire Wire Line
1.104 + 2200 4200 2900 4200
1.105 +Wire Wire Line
1.106 + 2200 4300 2900 4300
1.107 +Wire Wire Line
1.108 + 2200 4400 2900 4400
1.109 +Wire Wire Line
1.110 + 2200 4500 2900 4500
1.111 +Wire Wire Line
1.112 + 2200 4600 2900 4600
1.113 +Wire Wire Line
1.114 + 2200 4700 2900 4700
1.115 +Wire Wire Line
1.116 + 2200 4800 2900 4800
1.117 +Wire Wire Line
1.118 + 2200 4900 2900 4900
1.119 +Wire Wire Line
1.120 + 2200 5000 2900 5000
1.121 +Wire Wire Line
1.122 + 2200 5100 2900 5100
1.123 +Wire Wire Line
1.124 + 2200 5200 2900 5200
1.125 +Wire Wire Line
1.126 + 2200 5300 2900 5300
1.127 +Entry Wire Line
1.128 + 2100 2300 2200 2400
1.129 +Entry Wire Line
1.130 + 2100 2400 2200 2500
1.131 +Entry Wire Line
1.132 + 2100 2500 2200 2600
1.133 +Entry Wire Line
1.134 + 2100 2600 2200 2700
1.135 +Entry Wire Line
1.136 + 2100 2700 2200 2800
1.137 +Entry Wire Line
1.138 + 2100 2800 2200 2900
1.139 +Entry Wire Line
1.140 + 2100 2900 2200 3000
1.141 +Entry Wire Line
1.142 + 2100 3000 2200 3100
1.143 +Wire Wire Line
1.144 + 2200 2400 2900 2400
1.145 +Wire Wire Line
1.146 + 2200 2500 2900 2500
1.147 +Wire Wire Line
1.148 + 2200 2600 2900 2600
1.149 +Wire Wire Line
1.150 + 2200 2700 2900 2700
1.151 +Wire Wire Line
1.152 + 2200 2800 2900 2800
1.153 +Wire Wire Line
1.154 + 2200 2900 2900 2900
1.155 +Wire Wire Line
1.156 + 2200 3000 2900 3000
1.157 +Wire Wire Line
1.158 + 2200 3100 2900 3100
1.159 +Text Label 2900 2400 2 50 ~ 0
1.160 +A0
1.161 +Text Label 2900 2500 2 50 ~ 0
1.162 +A1
1.163 +Text Label 2900 2600 2 50 ~ 0
1.164 +A2
1.165 +Text Label 2900 2700 2 50 ~ 0
1.166 +A3
1.167 +Text Label 2900 2800 2 50 ~ 0
1.168 +A4
1.169 +Text Label 2900 2900 2 50 ~ 0
1.170 +A5
1.171 +Text Label 2900 3000 2 50 ~ 0
1.172 +A6
1.173 +Text Label 2900 3100 2 50 ~ 0
1.174 +A7
1.175 +Entry Wire Line
1.176 + 2100 2000 2200 2100
1.177 +Entry Wire Line
1.178 + 2100 2100 2200 2200
1.179 +Entry Wire Line
1.180 + 2100 2200 2200 2300
1.181 +Wire Wire Line
1.182 + 2200 2100 2900 2100
1.183 +Wire Wire Line
1.184 + 2200 2200 2900 2200
1.185 +Wire Wire Line
1.186 + 2200 2300 2900 2300
1.187 +Text Label 2900 2100 2 50 ~ 0
1.188 +~WE
1.189 +Text Label 2900 2200 2 50 ~ 0
1.190 +~RAS
1.191 +Text Label 2900 2300 2 50 ~ 0
1.192 +~CAS
1.193 +Wire Wire Line
1.194 + 2200 2000 2900 2000
1.195 +Wire Wire Line
1.196 + 2900 1900 2200 1900
1.197 +Wire Wire Line
1.198 + 2900 1800 2200 1800
1.199 +Wire Wire Line
1.200 + 2900 1700 2200 1700
1.201 +Entry Wire Line
1.202 + 2100 1600 2200 1700
1.203 +Entry Wire Line
1.204 + 2100 1700 2200 1800
1.205 +Entry Wire Line
1.206 + 2100 1800 2200 1900
1.207 +Entry Wire Line
1.208 + 2100 1900 2200 2000
1.209 +Text Label 2900 1700 2 50 ~ 0
1.210 +RAM0
1.211 +Text Label 2900 1800 2 50 ~ 0
1.212 +RAM1
1.213 +Text Label 2900 1900 2 50 ~ 0
1.214 +RAM2
1.215 +Text Label 2900 2000 2 50 ~ 0
1.216 +RAM3
1.217 +Text Label 2900 5500 2 50 ~ 0
1.218 +D0
1.219 +Text Label 2900 5600 2 50 ~ 0
1.220 +D1
1.221 +Text Label 2900 5700 2 50 ~ 0
1.222 +D2
1.223 +Text Label 2900 5800 2 50 ~ 0
1.224 +D3
1.225 +Text Label 2900 5900 2 50 ~ 0
1.226 +D4
1.227 +Text Label 2900 6000 2 50 ~ 0
1.228 +D5
1.229 +Text Label 2900 6100 2 50 ~ 0
1.230 +D6
1.231 +Text Label 2900 6200 2 50 ~ 0
1.232 +D7
1.233 +Wire Wire Line
1.234 + 2900 3800 2300 3800
1.235 +Wire Wire Line
1.236 + 2300 3800 2300 3700
1.237 +Entry Wire Line
1.238 + 2100 3100 2200 3200
1.239 +Entry Wire Line
1.240 + 2100 3200 2200 3300
1.241 +Entry Wire Line
1.242 + 2100 3300 2200 3400
1.243 +Entry Wire Line
1.244 + 2100 3400 2200 3500
1.245 +Wire Wire Line
1.246 + 2200 3200 2900 3200
1.247 +Wire Wire Line
1.248 + 2200 3300 2900 3300
1.249 +Wire Wire Line
1.250 + 2200 3400 2900 3400
1.251 +Wire Wire Line
1.252 + 2200 3500 2900 3500
1.253 +$Comp
1.254 +L Connector_Generic:Conn_01x03 PL3
1.255 +U 1 1 61CF9DF4
1.256 +P 1400 8900
1.257 +F 0 "PL3" H 1320 9217 50 0000 C CNN
1.258 +F 1 "Power" H 1320 9126 50 0000 C CNN
1.259 +F 2 "" H 1400 8900 50 0001 C CNN
1.260 +F 3 "~" H 1400 8900 50 0001 C CNN
1.261 + 1 1400 8900
1.262 + -1 0 0 -1
1.263 +$EndComp
1.264 +Text GLabel 2800 8800 2 50 Output ~ 0
1.265 +5V
1.266 +Wire Wire Line
1.267 + 1600 8800 2200 8800
1.268 +Text GLabel 2800 9300 2 50 Output ~ 0
1.269 +0V
1.270 +Text GLabel 2800 9800 2 50 Output ~ 0
1.271 +-5V
1.272 +Wire Wire Line
1.273 + 1900 9300 2100 9300
1.274 +Wire Wire Line
1.275 + 1800 9800 2100 9800
1.276 +Text GLabel 3800 7100 3 50 Input ~ 0
1.277 +0V
1.278 +Wire Wire Line
1.279 + 3800 7100 3800 6900
1.280 +Wire Wire Line
1.281 + 3800 6900 4000 6900
1.282 +Wire Wire Line
1.283 + 4000 6900 4000 6750
1.284 +Connection ~ 3800 6900
1.285 +Wire Wire Line
1.286 + 3800 6900 3800 6750
1.287 +Text GLabel 3600 900 1 50 Input ~ 0
1.288 +5V
1.289 +Wire Wire Line
1.290 + 3600 900 3600 1000
1.291 +$Comp
1.292 +L Device:R R5
1.293 +U 1 1 61F10DD6
1.294 +P 3800 1250
1.295 +F 0 "R5" H 3650 1300 50 0000 L CNN
1.296 +F 1 "24R" H 3750 1200 50 0000 R CNN
1.297 +F 2 "" V 3730 1250 50 0001 C CNN
1.298 +F 3 "~" H 3800 1250 50 0001 C CNN
1.299 + 1 3800 1250
1.300 + 1 0 0 -1
1.301 +$EndComp
1.302 +$Comp
1.303 +L Device:R R58
1.304 +U 1 1 61F10E39
1.305 +P 4000 1250
1.306 +F 0 "R58" H 4050 1300 50 0000 L CNN
1.307 +F 1 "24R" H 4050 1200 50 0000 L CNN
1.308 +F 2 "" V 3930 1250 50 0001 C CNN
1.309 +F 3 "~" H 4000 1250 50 0001 C CNN
1.310 + 1 4000 1250
1.311 + 1 0 0 -1
1.312 +$EndComp
1.313 +Wire Wire Line
1.314 + 3800 1550 3800 1400
1.315 +Wire Wire Line
1.316 + 4000 1550 4000 1400
1.317 +Wire Wire Line
1.318 + 3800 1100 3800 1000
1.319 +Wire Wire Line
1.320 + 3800 1000 3600 1000
1.321 +Connection ~ 3600 1000
1.322 +Wire Wire Line
1.323 + 3600 1000 3600 1550
1.324 +Wire Wire Line
1.325 + 4000 1100 4000 1000
1.326 +Wire Wire Line
1.327 + 4000 1000 3800 1000
1.328 +Connection ~ 3800 1000
1.329 +$Comp
1.330 +L Device:C C27
1.331 +U 1 1 61FBBBB4
1.332 +P 3350 1250
1.333 +F 0 "C27" H 3250 1300 50 0000 R CNN
1.334 +F 1 "10µF" H 3250 1200 50 0000 R CNN
1.335 +F 2 "" H 3388 1100 50 0001 C CNN
1.336 +F 3 "~" H 3350 1250 50 0001 C CNN
1.337 + 1 3350 1250
1.338 + 1 0 0 -1
1.339 +$EndComp
1.340 +Wire Wire Line
1.341 + 3600 1000 3350 1000
1.342 +Wire Wire Line
1.343 + 3350 1000 3350 1100
1.344 +Text GLabel 3250 1500 0 50 Input ~ 0
1.345 +0V
1.346 +Wire Wire Line
1.347 + 3250 1500 3350 1500
1.348 +Wire Wire Line
1.349 + 3350 1500 3350 1400
1.350 +$Comp
1.351 +L Device:C Ax19
1.352 +U 1 1 621AFB3A
1.353 +P 2700 9050
1.354 +F 0 "Ax19" H 2815 9096 50 0000 L CNN
1.355 +F 1 "47nF" H 2815 9005 50 0000 L CNN
1.356 +F 2 "" H 2738 8900 50 0001 C CNN
1.357 +F 3 "~" H 2700 9050 50 0001 C CNN
1.358 + 1 2700 9050
1.359 + 1 0 0 -1
1.360 +$EndComp
1.361 +$Comp
1.362 +L Device:C Ax1
1.363 +U 1 1 62245E33
1.364 +P 2600 9550
1.365 +F 0 "Ax1" H 2715 9596 50 0000 L CNN
1.366 +F 1 "47nF" H 2715 9505 50 0000 L CNN
1.367 +F 2 "" H 2638 9400 50 0001 C CNN
1.368 +F 3 "~" H 2600 9550 50 0001 C CNN
1.369 + 1 2600 9550
1.370 + 1 0 0 -1
1.371 +$EndComp
1.372 +$Comp
1.373 +L Device:CP C1
1.374 +U 1 1 62245FAE
1.375 +P 2200 9050
1.376 +F 0 "C1" H 2318 9096 50 0000 L CNN
1.377 +F 1 "47µF" H 2318 9005 50 0000 L CNN
1.378 +F 2 "" H 2238 8900 50 0001 C CNN
1.379 +F 3 "~" H 2200 9050 50 0001 C CNN
1.380 + 1 2200 9050
1.381 + 1 0 0 -1
1.382 +$EndComp
1.383 +$Comp
1.384 +L Device:CP C2
1.385 +U 1 1 62245FF4
1.386 +P 2100 9550
1.387 +F 0 "C2" H 2218 9596 50 0000 L CNN
1.388 +F 1 "10µF" H 2218 9505 50 0000 L CNN
1.389 +F 2 "" H 2138 9400 50 0001 C CNN
1.390 +F 3 "~" H 2100 9550 50 0001 C CNN
1.391 + 1 2100 9550
1.392 + 1 0 0 -1
1.393 +$EndComp
1.394 +Wire Wire Line
1.395 + 1900 9300 1900 8900
1.396 +Wire Wire Line
1.397 + 1900 8900 1600 8900
1.398 +Wire Wire Line
1.399 + 1800 9800 1800 9000
1.400 +Wire Wire Line
1.401 + 2200 8900 2200 8800
1.402 +Connection ~ 2200 8800
1.403 +Wire Wire Line
1.404 + 2200 8800 2700 8800
1.405 +Wire Wire Line
1.406 + 2100 9400 2100 9300
1.407 +Connection ~ 2100 9300
1.408 +Wire Wire Line
1.409 + 2100 9300 2200 9300
1.410 +Wire Wire Line
1.411 + 2200 9200 2200 9300
1.412 +Connection ~ 2200 9300
1.413 +Wire Wire Line
1.414 + 2200 9300 2600 9300
1.415 +Wire Wire Line
1.416 + 2100 9700 2100 9800
1.417 +Connection ~ 2100 9800
1.418 +Wire Wire Line
1.419 + 2100 9800 2600 9800
1.420 +Wire Wire Line
1.421 + 2600 9800 2600 9700
1.422 +Connection ~ 2600 9800
1.423 +Wire Wire Line
1.424 + 2600 9800 2800 9800
1.425 +Wire Wire Line
1.426 + 2600 9400 2600 9300
1.427 +Connection ~ 2600 9300
1.428 +Wire Wire Line
1.429 + 2600 9300 2700 9300
1.430 +Wire Wire Line
1.431 + 2700 9300 2700 9200
1.432 +Connection ~ 2700 9300
1.433 +Wire Wire Line
1.434 + 2700 9300 2800 9300
1.435 +Wire Wire Line
1.436 + 2700 8900 2700 8800
1.437 +Connection ~ 2700 8800
1.438 +Wire Wire Line
1.439 + 2700 8800 2800 8800
1.440 +$Comp
1.441 +L Connector_Generic:Conn_01x02 J?
1.442 +U 1 1 627DA4FF
1.443 +P 1400 10100
1.444 +F 0 "J?" H 1320 10317 50 0000 C CNN
1.445 +F 1 "Power" H 1320 10226 50 0000 C CNN
1.446 +F 2 "" H 1400 10100 50 0001 C CNN
1.447 +F 3 "~" H 1400 10100 50 0001 C CNN
1.448 + 1 1400 10100
1.449 + -1 0 0 -1
1.450 +$EndComp
1.451 +Wire Wire Line
1.452 + 3600 6750 3600 7400
1.453 +Wire Wire Line
1.454 + 3600 7400 3500 7400
1.455 +Text Label 1600 8800 0 50 ~ 0
1.456 +5V
1.457 +Text Label 1600 8900 0 50 ~ 0
1.458 +0V
1.459 +Wire Wire Line
1.460 + 1600 9000 1800 9000
1.461 +Text Label 1600 9000 0 50 ~ 0
1.462 +-5V
1.463 +Text Label 1600 10100 0 50 ~ 0
1.464 +RETURN
1.465 +Text Label 1600 10200 0 50 ~ 0
1.466 +18VAC
1.467 +Wire Wire Line
1.468 + 4600 7600 4600 6750
1.469 +$Sheet
1.470 +S 2800 7800 700 300
1.471 +U 61DF4BC2
1.472 +F0 "Clocks" 50
1.473 +F1 "clocks.sch" 50
1.474 +$EndSheet
1.475 +Text GLabel 3500 7600 0 50 Input ~ 0
1.476 +CLOCK_16MHz
1.477 +Text GLabel 3500 7400 0 50 Input ~ 0
1.478 +CLOCK_16MHz_DIV_13
1.479 +$Sheet
1.480 +S 1200 1100 700 300
1.481 +U 61D7EEE8
1.482 +F0 "RAM" 50
1.483 +F1 "RAM.sch" 50
1.484 +$EndSheet
1.485 +Wire Bus Line
1.486 + 2100 2000 2000 2000
1.487 +Wire Bus Line
1.488 + 2100 1600 2000 1600
1.489 +Text GLabel 2000 1600 0 50 BiDi ~ 0
1.490 +RAM_DATA
1.491 +Text GLabel 2000 2000 0 50 Output ~ 0
1.492 +RAM_ADDRESS
1.493 +$Sheet
1.494 +S 5800 1300 700 300
1.495 +U 624B50A6
1.496 +F0 "Cassette" 50
1.497 +F1 "cassette.sch" 50
1.498 +$EndSheet
1.499 +Text GLabel 5800 3600 2 50 Input ~ 0
1.500 +CASSETTE_INPUT
1.501 +Wire Wire Line
1.502 + 5600 3600 5800 3600
1.503 +Text GLabel 5800 1800 2 50 Output ~ 0
1.504 +CASSETTE_OUTPUT
1.505 +Wire Wire Line
1.506 + 5600 1800 5800 1800
1.507 +$Sheet
1.508 +S 5800 4200 700 300
1.509 +U 61E9B87F
1.510 +F0 "Sound" 50
1.511 +F1 "sound.sch" 50
1.512 +$EndSheet
1.513 +Text GLabel 5800 4700 2 50 Output ~ 0
1.514 +SOUND_OUTPUT
1.515 +Wire Wire Line
1.516 + 5600 4700 5800 4700
1.517 +Text GLabel 2000 10100 2 50 UnSpc ~ 0
1.518 +POWER_AC_RETURN
1.519 +Text GLabel 2000 10200 2 50 UnSpc ~ 0
1.520 +POWER_18VAC
1.521 +Wire Wire Line
1.522 + 1600 10100 2000 10100
1.523 +Wire Wire Line
1.524 + 1600 10200 2000 10200
1.525 +Wire Wire Line
1.526 + 3500 7600 4600 7600
1.527 +Text GLabel 1700 6400 0 50 Output ~ 0
1.528 +PHI_OUT
1.529 +$Sheet
1.530 +S 1300 7800 700 300
1.531 +U 61FB7D7E
1.532 +F0 "Expansion" 50
1.533 +F1 "expansion.sch" 50
1.534 +$EndSheet
1.535 +Text GLabel 2000 5400 0 50 BiDi ~ 0
1.536 +CPU_DATA
1.537 +Wire Bus Line
1.538 + 2000 5400 2100 5400
1.539 +Text GLabel 2000 3800 0 50 Input ~ 0
1.540 +CPU_ADDRESS
1.541 +Text GLabel 1700 6600 0 50 Input ~ 0
1.542 +RnW
1.543 +Text GLabel 2000 6500 0 50 Output ~ 0
1.544 +~IRQ
1.545 +Text GLabel 2000 6300 0 50 Input ~ 0
1.546 +~NMI
1.547 +Text GLabel 2700 3700 0 50 Input ~ 0
1.548 +~RST
1.549 +$Sheet
1.550 +S 1300 6800 700 300
1.551 +U 61F2273C
1.552 +F0 "CPU, ROM, keyboard" 50
1.553 +F1 "CPU_ROM_KBD.sch" 50
1.554 +$EndSheet
1.555 +Text GLabel 2000 3100 0 50 Input ~ 0
1.556 +KBD_DATA
1.557 +Wire Bus Line
1.558 + 2000 3100 2100 3100
1.559 +Wire Wire Line
1.560 + 2700 3700 2900 3700
1.561 +Entry Wire Line
1.562 + 2100 5400 2200 5500
1.563 +Entry Wire Line
1.564 + 2100 5500 2200 5600
1.565 +Entry Wire Line
1.566 + 2100 5600 2200 5700
1.567 +Entry Wire Line
1.568 + 2100 5700 2200 5800
1.569 +Entry Wire Line
1.570 + 2100 5800 2200 5900
1.571 +Entry Wire Line
1.572 + 2100 5900 2200 6000
1.573 +Entry Wire Line
1.574 + 2100 6000 2200 6100
1.575 +Entry Wire Line
1.576 + 2100 6100 2200 6200
1.577 +Wire Wire Line
1.578 + 2200 5500 2900 5500
1.579 +Wire Wire Line
1.580 + 2200 5600 2900 5600
1.581 +Wire Wire Line
1.582 + 2200 5700 2900 5700
1.583 +Wire Wire Line
1.584 + 2200 5800 2900 5800
1.585 +Wire Wire Line
1.586 + 2200 5900 2900 5900
1.587 +Wire Wire Line
1.588 + 2200 6000 2900 6000
1.589 +Wire Wire Line
1.590 + 2200 6100 2900 6100
1.591 +Wire Wire Line
1.592 + 2200 6200 2900 6200
1.593 +Text GLabel 2000 3600 0 50 Input ~ 0
1.594 +CAPS_LOCK
1.595 +Wire Wire Line
1.596 + 2200 5400 2900 5400
1.597 +Text GLabel 1300 3700 0 50 Output ~ 0
1.598 +ROM
1.599 +Wire Wire Line
1.600 + 2000 3600 2900 3600
1.601 +Wire Wire Line
1.602 + 2300 3700 1300 3700
1.603 +Wire Wire Line
1.604 + 2000 6300 2900 6300
1.605 +Wire Wire Line
1.606 + 2000 6500 2900 6500
1.607 +Wire Wire Line
1.608 + 1700 6600 2900 6600
1.609 +Wire Wire Line
1.610 + 1700 6400 2900 6400
1.611 +$Sheet
1.612 +S 4800 7800 700 300
1.613 +U 61DB955D
1.614 +F0 "Video" 50
1.615 +F1 "video.sch" 50
1.616 +$EndSheet
1.617 +Wire Wire Line
1.618 + 6300 5500 6200 5500
1.619 +Wire Wire Line
1.620 + 6300 5100 6200 5100
1.621 +Wire Wire Line
1.622 + 5800 5100 5900 5100
1.623 +Wire Wire Line
1.624 + 5800 5500 5900 5500
1.625 +Wire Wire Line
1.626 + 5800 5300 5800 5100
1.627 +Wire Wire Line
1.628 + 5800 5300 5800 5500
1.629 +Connection ~ 5800 5300
1.630 +Wire Wire Line
1.631 + 5600 5300 5800 5300
1.632 +Text GLabel 6300 5500 2 50 Input ~ 0
1.633 +0V
1.634 +$Comp
1.635 +L Device:C C9
1.636 +U 1 1 621AE941
1.637 +P 6050 5500
1.638 +F 0 "C9" V 5798 5500 50 0000 C CNN
1.639 +F 1 "1µF" V 5889 5500 50 0000 C CNN
1.640 +F 2 "" H 6088 5350 50 0001 C CNN
1.641 +F 3 "~" H 6050 5500 50 0001 C CNN
1.642 + 1 6050 5500
1.643 + 0 1 1 0
1.644 +$EndComp
1.645 +Text GLabel 6300 5100 2 50 Input ~ 0
1.646 +5V
1.647 +$Comp
1.648 +L Device:R R7
1.649 +U 1 1 61FA16A2
1.650 +P 6050 5100
1.651 +F 0 "R7" V 5843 5100 50 0000 C CNN
1.652 +F 1 "56000R" V 5934 5100 50 0000 C CNN
1.653 +F 2 "" V 5980 5100 50 0001 C CNN
1.654 +F 3 "~" H 6050 5100 50 0001 C CNN
1.655 + 1 6050 5100
1.656 + 0 1 1 0
1.657 +$EndComp
1.658 +Text GLabel 7100 6100 2 50 Output ~ 0
1.659 +~CSYNC
1.660 +Text GLabel 7100 6700 2 50 Output ~ 0
1.661 +BLUE
1.662 +Text GLabel 7100 7300 2 50 Output ~ 0
1.663 +GREEN
1.664 +Text GLabel 7100 7900 2 50 Output ~ 0
1.665 +RED
1.666 +Wire Wire Line
1.667 + 5600 5700 6100 5700
1.668 +Text GLabel 4900 7000 2 50 Output ~ 0
1.669 +~HS
1.670 +Wire Wire Line
1.671 + 4800 6750 4800 7000
1.672 +Wire Wire Line
1.673 + 4800 7000 4900 7000
1.674 +Text GLabel 5800 2300 2 50 BiDi ~ 0
1.675 +CASSETTE_RC
1.676 +Text GLabel 5800 2600 2 50 Output ~ 0
1.677 +CASSETTE_MOTOR
1.678 +Wire Wire Line
1.679 + 5600 2300 5800 2300
1.680 +Wire Wire Line
1.681 + 5600 2600 5800 2600
1.682 +$Sheet
1.683 +S 4800 7200 700 300
1.684 +U 62411C42
1.685 +F0 "UHF" 50
1.686 +F1 "UHF.sch" 50
1.687 +$EndSheet
1.688 +Wire Wire Line
1.689 + 5600 6300 5800 6300
1.690 +Wire Wire Line
1.691 + 5600 5900 6000 5900
1.692 +Text Notes 5800 9150 0 50 ~ 0
1.693 +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.
1.694 +$Comp
1.695 +L 74xx:74LS08 IC19
1.696 +U 1 1 61E3E3E3
1.697 +P 6700 7300
1.698 +F 0 "IC19" H 6700 7625 50 0000 C CNN
1.699 +F 1 "74LS08" H 6700 7534 50 0000 C CNN
1.700 +F 2 "" H 6700 7300 50 0001 C CNN
1.701 +F 3 "http://www.ti.com/lit/gpn/sn74LS08" H 6700 7300 50 0001 C CNN
1.702 + 1 6700 7300
1.703 + 1 0 0 -1
1.704 +$EndComp
1.705 +$Comp
1.706 +L 74xx:74LS08 IC19
1.707 +U 2 1 61E3E49E
1.708 +P 6700 7900
1.709 +F 0 "IC19" H 6700 8225 50 0000 C CNN
1.710 +F 1 "74LS08" H 6700 8134 50 0000 C CNN
1.711 +F 2 "" H 6700 7900 50 0001 C CNN
1.712 +F 3 "http://www.ti.com/lit/gpn/sn74LS08" H 6700 7900 50 0001 C CNN
1.713 + 2 6700 7900
1.714 + 1 0 0 -1
1.715 +$EndComp
1.716 +$Comp
1.717 +L 74xx:74LS08 IC19
1.718 +U 3 1 61E3E509
1.719 +P 6700 6100
1.720 +F 0 "IC19" H 6700 6425 50 0000 C CNN
1.721 +F 1 "74LS08" H 6700 6334 50 0000 C CNN
1.722 +F 2 "" H 6700 6100 50 0001 C CNN
1.723 +F 3 "http://www.ti.com/lit/gpn/sn74LS08" H 6700 6100 50 0001 C CNN
1.724 + 3 6700 6100
1.725 + 1 0 0 -1
1.726 +$EndComp
1.727 +$Comp
1.728 +L 74xx:74LS08 IC19
1.729 +U 4 1 61E3E573
1.730 +P 6700 6700
1.731 +F 0 "IC19" H 6700 7025 50 0000 C CNN
1.732 +F 1 "74LS08" H 6700 6934 50 0000 C CNN
1.733 +F 2 "" H 6700 6700 50 0001 C CNN
1.734 +F 3 "http://www.ti.com/lit/gpn/sn74LS08" H 6700 6700 50 0001 C CNN
1.735 + 4 6700 6700
1.736 + 1 0 0 -1
1.737 +$EndComp
1.738 +$Comp
1.739 +L 74xx:74LS08 IC19
1.740 +U 5 1 61E3E5E4
1.741 +P 7200 8900
1.742 +F 0 "IC19" H 7430 8946 50 0000 L CNN
1.743 +F 1 "74LS08" H 7430 8855 50 0000 L CNN
1.744 +F 2 "" H 7200 8900 50 0001 C CNN
1.745 +F 3 "http://www.ti.com/lit/gpn/sn74LS08" H 7200 8900 50 0001 C CNN
1.746 + 5 7200 8900
1.747 + 1 0 0 -1
1.748 +$EndComp
1.749 +Wire Wire Line
1.750 + 5800 6300 5800 7800
1.751 +Wire Wire Line
1.752 + 5800 7800 6400 7800
1.753 +Wire Wire Line
1.754 + 5900 6100 5900 7200
1.755 +Wire Wire Line
1.756 + 5900 7200 6400 7200
1.757 +Wire Wire Line
1.758 + 5600 6100 5900 6100
1.759 +Wire Wire Line
1.760 + 6000 5900 6000 6800
1.761 +Wire Wire Line
1.762 + 6000 6800 6400 6800
1.763 +Wire Wire Line
1.764 + 6100 5700 6100 6200
1.765 +Wire Wire Line
1.766 + 6100 6200 6400 6200
1.767 +$Comp
1.768 +L Jumper:Jumper_2_Bridged LK7
1.769 +U 1 1 61EC346B
1.770 +P 6600 8400
1.771 +F 0 "LK7" H 6600 8595 50 0000 C CNN
1.772 +F 1 "Jumper_2_Bridged" H 6600 8504 50 0000 C CNN
1.773 +F 2 "" H 6600 8400 50 0001 C CNN
1.774 +F 3 "~" H 6600 8400 50 0001 C CNN
1.775 + 1 6600 8400
1.776 + 1 0 0 -1
1.777 +$EndComp
1.778 +Wire Wire Line
1.779 + 6400 8000 6200 8000
1.780 +Wire Wire Line
1.781 + 6200 8000 6200 8400
1.782 +Wire Wire Line
1.783 + 6200 8400 6400 8400
1.784 +Wire Wire Line
1.785 + 6200 8000 6200 7400
1.786 +Wire Wire Line
1.787 + 6200 7400 6400 7400
1.788 +Connection ~ 6200 8000
1.789 +Wire Wire Line
1.790 + 6200 7400 6200 6600
1.791 +Wire Wire Line
1.792 + 6200 6600 6400 6600
1.793 +Connection ~ 6200 7400
1.794 +Wire Wire Line
1.795 + 6200 6600 6200 6000
1.796 +Wire Wire Line
1.797 + 6200 6000 6400 6000
1.798 +Connection ~ 6200 6600
1.799 +Wire Wire Line
1.800 + 7000 6100 7100 6100
1.801 +Wire Wire Line
1.802 + 7000 6700 7100 6700
1.803 +Wire Wire Line
1.804 + 7000 7300 7100 7300
1.805 +Wire Wire Line
1.806 + 7000 7900 7100 7900
1.807 +Text GLabel 6900 8400 2 50 Input ~ 0
1.808 +5V
1.809 +Wire Wire Line
1.810 + 6900 8400 6800 8400
1.811 +Text GLabel 7200 8300 1 50 Input ~ 0
1.812 +5V
1.813 +Wire Wire Line
1.814 + 7200 8300 7200 8400
1.815 +Text GLabel 7200 9500 3 50 Input ~ 0
1.816 +0V
1.817 +Wire Wire Line
1.818 + 7200 9500 7200 9400
1.819 +Text GLabel 6100 8400 0 50 Output ~ 0
1.820 +BUFFER_ENABLE
1.821 +Wire Wire Line
1.822 + 6100 8400 6200 8400
1.823 +Wire Bus Line
1.824 + 2100 1600 2100 1900
1.825 +Wire Bus Line
1.826 + 2100 3100 2100 3400
1.827 +Wire Bus Line
1.828 + 2100 2000 2100 3000
1.829 +Wire Bus Line
1.830 + 2100 5400 2100 6100
1.831 +Wire Bus Line
1.832 + 2100 3800 2100 5300
1.833 +Connection ~ 6200 8400
1.834 +$EndSCHEMATC