1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/RAM.sch Wed Jan 26 22:13:42 2022 +0100
1.3 @@ -0,0 +1,512 @@
1.4 +EESchema Schematic File Version 4
1.5 +LIBS:AcornElectronMainboard-cache
1.6 +EELAYER 26 0
1.7 +EELAYER END
1.8 +$Descr A4 11693 8268
1.9 +encoding utf-8
1.10 +Sheet 3 9
1.11 +Title ""
1.12 +Date ""
1.13 +Rev ""
1.14 +Comp ""
1.15 +Comment1 ""
1.16 +Comment2 ""
1.17 +Comment3 ""
1.18 +Comment4 ""
1.19 +$EndDescr
1.20 +$Comp
1.21 +L DRAM:4164 IC4
1.22 +U 1 1 61D7F23A
1.23 +P 2350 2650
1.24 +F 0 "IC4" H 2350 3225 50 0000 C CNN
1.25 +F 1 "4164" H 2350 3134 50 0000 C CNN
1.26 +F 2 "" H 2300 2650 50 0001 C CNN
1.27 +F 3 "" H 2300 2650 50 0001 C CNN
1.28 + 1 2350 2650
1.29 + 1 0 0 -1
1.30 +$EndComp
1.31 +$Comp
1.32 +L DRAM:4164 IC5
1.33 +U 1 1 61D7F241
1.34 +P 3750 2650
1.35 +F 0 "IC5" H 3750 3225 50 0000 C CNN
1.36 +F 1 "4164" H 3750 3134 50 0000 C CNN
1.37 +F 2 "" H 3700 2650 50 0001 C CNN
1.38 +F 3 "" H 3700 2650 50 0001 C CNN
1.39 + 1 3750 2650
1.40 + 1 0 0 -1
1.41 +$EndComp
1.42 +$Comp
1.43 +L DRAM:4164 IC6
1.44 +U 1 1 61D7F248
1.45 +P 5150 2650
1.46 +F 0 "IC6" H 5150 3225 50 0000 C CNN
1.47 +F 1 "4164" H 5150 3134 50 0000 C CNN
1.48 +F 2 "" H 5100 2650 50 0001 C CNN
1.49 +F 3 "" H 5100 2650 50 0001 C CNN
1.50 + 1 5150 2650
1.51 + 1 0 0 -1
1.52 +$EndComp
1.53 +$Comp
1.54 +L DRAM:4164 IC7
1.55 +U 1 1 61D7F24F
1.56 +P 6550 2650
1.57 +F 0 "IC7" H 6550 3225 50 0000 C CNN
1.58 +F 1 "4164" H 6550 3134 50 0000 C CNN
1.59 +F 2 "" H 6500 2650 50 0001 C CNN
1.60 +F 3 "" H 6500 2650 50 0001 C CNN
1.61 + 1 6550 2650
1.62 + 1 0 0 -1
1.63 +$EndComp
1.64 +Entry Wire Line
1.65 + 1700 2600 1800 2700
1.66 +Entry Wire Line
1.67 + 1700 2700 1800 2800
1.68 +Entry Wire Line
1.69 + 1700 2800 1800 2900
1.70 +Connection ~ 3000 3300
1.71 +Wire Bus Line
1.72 + 3000 3300 1700 3300
1.73 +Entry Wire Line
1.74 + 2900 2600 3000 2700
1.75 +Entry Wire Line
1.76 + 2900 2700 3000 2800
1.77 +Entry Wire Line
1.78 + 2900 2800 3000 2900
1.79 +Entry Wire Line
1.80 + 2900 2900 3000 3000
1.81 +Entry Wire Line
1.82 + 2900 3000 3000 3100
1.83 +Connection ~ 3100 3300
1.84 +Wire Bus Line
1.85 + 3100 3300 3000 3300
1.86 +Entry Wire Line
1.87 + 3100 2600 3200 2700
1.88 +Entry Wire Line
1.89 + 3100 2700 3200 2800
1.90 +Entry Wire Line
1.91 + 3100 2800 3200 2900
1.92 +Entry Wire Line
1.93 + 4300 2600 4400 2700
1.94 +Entry Wire Line
1.95 + 4300 2700 4400 2800
1.96 +Entry Wire Line
1.97 + 4300 2800 4400 2900
1.98 +Entry Wire Line
1.99 + 4300 2900 4400 3000
1.100 +Entry Wire Line
1.101 + 4300 3000 4400 3100
1.102 +Entry Wire Line
1.103 + 4500 2600 4600 2700
1.104 +Entry Wire Line
1.105 + 4500 2700 4600 2800
1.106 +Entry Wire Line
1.107 + 4500 2800 4600 2900
1.108 +Entry Wire Line
1.109 + 5700 2600 5800 2700
1.110 +Entry Wire Line
1.111 + 5700 2700 5800 2800
1.112 +Entry Wire Line
1.113 + 5700 2800 5800 2900
1.114 +Entry Wire Line
1.115 + 5700 2900 5800 3000
1.116 +Entry Wire Line
1.117 + 5700 3000 5800 3100
1.118 +Entry Wire Line
1.119 + 5900 2600 6000 2700
1.120 +Entry Wire Line
1.121 + 5900 2700 6000 2800
1.122 +Entry Wire Line
1.123 + 5900 2800 6000 2900
1.124 +Entry Wire Line
1.125 + 7100 2600 7200 2700
1.126 +Entry Wire Line
1.127 + 7100 2700 7200 2800
1.128 +Entry Wire Line
1.129 + 7100 2800 7200 2900
1.130 +Entry Wire Line
1.131 + 7100 2900 7200 3000
1.132 +Entry Wire Line
1.133 + 7100 3000 7200 3100
1.134 +Wire Wire Line
1.135 + 6900 2600 7100 2600
1.136 +Wire Wire Line
1.137 + 6900 2700 7100 2700
1.138 +Wire Wire Line
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1.140 +Wire Wire Line
1.141 + 6900 2900 7100 2900
1.142 +Wire Wire Line
1.143 + 6900 3000 7100 3000
1.144 +Wire Wire Line
1.145 + 6000 2700 6200 2700
1.146 +Wire Wire Line
1.147 + 6000 2800 6200 2800
1.148 +Wire Wire Line
1.149 + 6000 2900 6200 2900
1.150 +Wire Wire Line
1.151 + 1800 2700 2000 2700
1.152 +Wire Wire Line
1.153 + 1800 2800 2000 2800
1.154 +Wire Wire Line
1.155 + 1800 2900 2000 2900
1.156 +Wire Wire Line
1.157 + 2700 2600 2900 2600
1.158 +Wire Wire Line
1.159 + 2700 2700 2900 2700
1.160 +Wire Wire Line
1.161 + 2700 2800 2900 2800
1.162 +Wire Wire Line
1.163 + 2700 2900 2900 2900
1.164 +Wire Wire Line
1.165 + 2700 3000 2900 3000
1.166 +Wire Wire Line
1.167 + 3200 2700 3400 2700
1.168 +Wire Wire Line
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1.170 +Wire Wire Line
1.171 + 3200 2900 3400 2900
1.172 +Wire Wire Line
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1.174 +Wire Wire Line
1.175 + 4100 2700 4300 2700
1.176 +Wire Wire Line
1.177 + 4100 2800 4300 2800
1.178 +Wire Wire Line
1.179 + 4100 2900 4300 2900
1.180 +Wire Wire Line
1.181 + 4100 3000 4300 3000
1.182 +Wire Wire Line
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1.184 +Wire Wire Line
1.185 + 4600 2800 4800 2800
1.186 +Wire Wire Line
1.187 + 4600 2900 4800 2900
1.188 +Wire Wire Line
1.189 + 5500 2600 5700 2600
1.190 +Wire Wire Line
1.191 + 5500 2700 5700 2700
1.192 +Wire Wire Line
1.193 + 5500 2800 5700 2800
1.194 +Wire Wire Line
1.195 + 5500 2900 5700 2900
1.196 +Wire Wire Line
1.197 + 5500 3000 5700 3000
1.198 +Text Label 6900 2600 0 50 ~ 0
1.199 +A6
1.200 +Text Label 6900 2700 0 50 ~ 0
1.201 +A3
1.202 +Text Label 6900 2800 0 50 ~ 0
1.203 +A4
1.204 +Text Label 6900 2900 0 50 ~ 0
1.205 +A5
1.206 +Text Label 6900 3000 0 50 ~ 0
1.207 +A7
1.208 +Text Label 6200 2700 2 50 ~ 0
1.209 +A0
1.210 +Text Label 6200 2800 2 50 ~ 0
1.211 +A2
1.212 +Text Label 6200 2900 2 50 ~ 0
1.213 +A1
1.214 +Text Label 5500 2600 0 50 ~ 0
1.215 +A6
1.216 +Text Label 4100 2600 0 50 ~ 0
1.217 +A6
1.218 +Text Label 2700 2600 0 50 ~ 0
1.219 +A6
1.220 +Text Label 5500 2700 0 50 ~ 0
1.221 +A3
1.222 +Text Label 4100 2700 0 50 ~ 0
1.223 +A3
1.224 +Text Label 2700 2700 0 50 ~ 0
1.225 +A3
1.226 +Text Label 5500 2800 0 50 ~ 0
1.227 +A4
1.228 +Text Label 4100 2800 0 50 ~ 0
1.229 +A4
1.230 +Text Label 2700 2800 0 50 ~ 0
1.231 +A4
1.232 +Text Label 5500 2900 0 50 ~ 0
1.233 +A5
1.234 +Text Label 4100 2900 0 50 ~ 0
1.235 +A5
1.236 +Text Label 2700 2900 0 50 ~ 0
1.237 +A5
1.238 +Text Label 5500 3000 0 50 ~ 0
1.239 +A7
1.240 +Text Label 4100 3000 0 50 ~ 0
1.241 +A7
1.242 +Text Label 2700 3000 0 50 ~ 0
1.243 +A7
1.244 +Text Label 4800 2700 2 50 ~ 0
1.245 +A0
1.246 +Text Label 4800 2800 2 50 ~ 0
1.247 +A2
1.248 +Text Label 4800 2900 2 50 ~ 0
1.249 +A1
1.250 +Text Label 3400 2700 2 50 ~ 0
1.251 +A0
1.252 +Text Label 2000 2700 2 50 ~ 0
1.253 +A0
1.254 +Text Label 3400 2800 2 50 ~ 0
1.255 +A2
1.256 +Text Label 2000 2800 2 50 ~ 0
1.257 +A2
1.258 +Text Label 3400 2900 2 50 ~ 0
1.259 +A1
1.260 +Text Label 2000 2900 2 50 ~ 0
1.261 +A1
1.262 +Entry Wire Line
1.263 + 7100 2400 7200 2500
1.264 +Entry Wire Line
1.265 + 5900 2400 6000 2500
1.266 +Entry Wire Line
1.267 + 5900 2500 6000 2600
1.268 +Entry Wire Line
1.269 + 5700 2400 5800 2500
1.270 +Entry Wire Line
1.271 + 4500 2400 4600 2500
1.272 +Entry Wire Line
1.273 + 4500 2500 4600 2600
1.274 +Entry Wire Line
1.275 + 4300 2400 4400 2500
1.276 +Entry Wire Line
1.277 + 3100 2400 3200 2500
1.278 +Entry Wire Line
1.279 + 3100 2500 3200 2600
1.280 +Entry Wire Line
1.281 + 2900 2400 3000 2500
1.282 +Entry Wire Line
1.283 + 1700 2400 1800 2500
1.284 +Entry Wire Line
1.285 + 1700 2500 1800 2600
1.286 +Wire Wire Line
1.287 + 1800 2500 2000 2500
1.288 +Wire Wire Line
1.289 + 1800 2600 2000 2600
1.290 +Wire Wire Line
1.291 + 2700 2400 2900 2400
1.292 +Wire Wire Line
1.293 + 3200 2500 3400 2500
1.294 +Wire Wire Line
1.295 + 3200 2600 3400 2600
1.296 +Wire Wire Line
1.297 + 4100 2400 4300 2400
1.298 +Wire Wire Line
1.299 + 4600 2500 4800 2500
1.300 +Wire Wire Line
1.301 + 4600 2600 4800 2600
1.302 +Wire Wire Line
1.303 + 5500 2400 5700 2400
1.304 +Wire Wire Line
1.305 + 6000 2500 6200 2500
1.306 +Wire Wire Line
1.307 + 6000 2600 6200 2600
1.308 +Wire Wire Line
1.309 + 6900 2400 7100 2400
1.310 +Text Label 6200 2600 2 50 ~ 0
1.311 +~RAS
1.312 +Text Label 4800 2600 2 50 ~ 0
1.313 +~RAS
1.314 +Text Label 3400 2600 2 50 ~ 0
1.315 +~RAS
1.316 +Text Label 2000 2600 2 50 ~ 0
1.317 +~RAS
1.318 +Text Label 6200 2500 2 50 ~ 0
1.319 +~WE
1.320 +Text Label 4800 2500 2 50 ~ 0
1.321 +~WE
1.322 +Text Label 3400 2500 2 50 ~ 0
1.323 +~WE
1.324 +Text Label 2000 2500 2 50 ~ 0
1.325 +~WE
1.326 +Text Label 6900 2400 0 50 ~ 0
1.327 +~CAS
1.328 +Text Label 5500 2400 0 50 ~ 0
1.329 +~CAS
1.330 +Text Label 4100 2400 0 50 ~ 0
1.331 +~CAS
1.332 +Text Label 2700 2400 0 50 ~ 0
1.333 +~CAS
1.334 +Wire Wire Line
1.335 + 6000 2400 5900 2300
1.336 +Wire Wire Line
1.337 + 5900 2300 5900 1700
1.338 +Wire Wire Line
1.339 + 7200 2400 7200 1700
1.340 +Wire Wire Line
1.341 + 7100 2500 7200 2400
1.342 +Wire Wire Line
1.343 + 6900 2500 7100 2500
1.344 +Wire Wire Line
1.345 + 5700 2500 5800 2400
1.346 +Wire Wire Line
1.347 + 5800 2400 5800 1700
1.348 +Wire Wire Line
1.349 + 5500 2500 5700 2500
1.350 +Wire Wire Line
1.351 + 4300 2500 4400 2400
1.352 +Wire Wire Line
1.353 + 4400 2400 4400 1700
1.354 +Wire Wire Line
1.355 + 4300 2500 4100 2500
1.356 +Wire Wire Line
1.357 + 2900 2500 3000 2400
1.358 +Wire Wire Line
1.359 + 3000 2400 3000 1700
1.360 +Wire Wire Line
1.361 + 2900 2500 2700 2500
1.362 +Wire Wire Line
1.363 + 4500 2300 4600 2400
1.364 +Wire Wire Line
1.365 + 4500 1700 4500 2300
1.366 +Wire Wire Line
1.367 + 1700 2300 1800 2400
1.368 +Wire Wire Line
1.369 + 1700 1700 1700 2300
1.370 +Wire Wire Line
1.371 + 3100 2300 3200 2400
1.372 +Wire Wire Line
1.373 + 3100 1700 3100 2300
1.374 +Connection ~ 7200 3300
1.375 +Text Label 6900 2500 0 50 ~ 0
1.376 +RAM3
1.377 +Connection ~ 5900 3300
1.378 +Wire Bus Line
1.379 + 5900 3300 7200 3300
1.380 +Connection ~ 4500 3300
1.381 +Connection ~ 5800 3300
1.382 +Wire Bus Line
1.383 + 5800 3300 5900 3300
1.384 +Wire Bus Line
1.385 + 4500 3300 5800 3300
1.386 +Connection ~ 4400 3300
1.387 +Wire Bus Line
1.388 + 4400 3300 4500 3300
1.389 +Wire Bus Line
1.390 + 3100 3300 4400 3300
1.391 +Text Label 5500 2500 0 50 ~ 0
1.392 +RAM2
1.393 +Text Label 4100 2500 0 50 ~ 0
1.394 +RAM1
1.395 +Text Label 2700 2500 0 50 ~ 0
1.396 +RAM0
1.397 +Text Label 6200 2400 2 50 ~ 0
1.398 +RAM3
1.399 +Text Label 4800 2400 2 50 ~ 0
1.400 +RAM2
1.401 +Text Label 3400 2400 2 50 ~ 0
1.402 +RAM1
1.403 +Text Label 2000 2400 2 50 ~ 0
1.404 +RAM0
1.405 +Wire Wire Line
1.406 + 6000 2400 6200 2400
1.407 +Wire Wire Line
1.408 + 4600 2400 4800 2400
1.409 +Wire Wire Line
1.410 + 3200 2400 3400 2400
1.411 +Wire Wire Line
1.412 + 1800 2400 2000 2400
1.413 +Entry Wire Line
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1.415 +Entry Wire Line
1.416 + 5800 1600 5900 1700
1.417 +Entry Wire Line
1.418 + 5700 1600 5800 1700
1.419 +Entry Wire Line
1.420 + 4400 1600 4500 1700
1.421 +Entry Wire Line
1.422 + 4300 1600 4400 1700
1.423 +Entry Wire Line
1.424 + 3000 1600 3100 1700
1.425 +Entry Wire Line
1.426 + 2900 1600 3000 1700
1.427 +Entry Wire Line
1.428 + 1600 1600 1700 1700
1.429 +Text GLabel 1400 1200 1 50 Input ~ 0
1.430 +5V
1.431 +Wire Wire Line
1.432 + 1400 1200 1400 3100
1.433 +Wire Wire Line
1.434 + 6100 3100 6100 3000
1.435 +Wire Wire Line
1.436 + 6100 3000 6200 3000
1.437 +Wire Wire Line
1.438 + 4700 3100 4700 3000
1.439 +Wire Wire Line
1.440 + 4700 3000 4800 3000
1.441 +Connection ~ 4700 3100
1.442 +Wire Wire Line
1.443 + 3300 3100 3300 3000
1.444 +Wire Wire Line
1.445 + 3300 3000 3400 3000
1.446 +Connection ~ 3300 3100
1.447 +Wire Wire Line
1.448 + 1900 3100 1900 3000
1.449 +Wire Wire Line
1.450 + 1900 3000 2000 3000
1.451 +Wire Wire Line
1.452 + 1400 3100 1900 3100
1.453 +Connection ~ 1900 3100
1.454 +Text GLabel 1600 1200 1 50 Input ~ 0
1.455 +0V
1.456 +Wire Wire Line
1.457 + 1600 1200 1600 1400
1.458 +Wire Wire Line
1.459 + 1600 1400 2800 1400
1.460 +Wire Wire Line
1.461 + 7000 1400 7000 2300
1.462 +Wire Wire Line
1.463 + 7000 2300 6900 2300
1.464 +Wire Wire Line
1.465 + 5500 2300 5600 2300
1.466 +Wire Wire Line
1.467 + 5600 2300 5600 1400
1.468 +Connection ~ 5600 1400
1.469 +Wire Wire Line
1.470 + 5600 1400 7000 1400
1.471 +Wire Wire Line
1.472 + 4100 2300 4200 2300
1.473 +Wire Wire Line
1.474 + 4200 2300 4200 1400
1.475 +Connection ~ 4200 1400
1.476 +Wire Wire Line
1.477 + 4200 1400 5600 1400
1.478 +Wire Wire Line
1.479 + 2700 2300 2800 2300
1.480 +Wire Wire Line
1.481 + 2800 2300 2800 1400
1.482 +Connection ~ 2800 1400
1.483 +Wire Wire Line
1.484 + 2800 1400 4200 1400
1.485 +Wire Bus Line
1.486 + 7200 3300 7400 3300
1.487 +Text GLabel 7400 1600 2 50 BiDi ~ 0
1.488 +RAM_DATA
1.489 +Text GLabel 7400 3300 2 50 Input ~ 0
1.490 +RAM_ADDRESS
1.491 +Wire Wire Line
1.492 + 1900 3100 3300 3100
1.493 +Wire Wire Line
1.494 + 3300 3100 4700 3100
1.495 +Wire Wire Line
1.496 + 4700 3100 6100 3100
1.497 +Wire Bus Line
1.498 + 5900 2400 5900 3300
1.499 +Wire Bus Line
1.500 + 4500 2400 4500 3300
1.501 +Wire Bus Line
1.502 + 3100 2400 3100 3300
1.503 +Wire Bus Line
1.504 + 1700 2400 1700 3300
1.505 +Wire Bus Line
1.506 + 3000 2500 3000 3300
1.507 +Wire Bus Line
1.508 + 4400 2500 4400 3300
1.509 +Wire Bus Line
1.510 + 5800 2500 5800 3300
1.511 +Wire Bus Line
1.512 + 7200 2500 7200 3300
1.513 +Wire Bus Line
1.514 + 1600 1600 7400 1600
1.515 +$EndSCHEMATC