ramcard.sch@ 4e47de3

main

Last change on this file since 4e47de3 was eecc779, checked in by Adrien Destugues <adrien.destugues@…>, 3 years ago
Latest version of flashgordon, WIP for Gemini
Property mode set to `100644`
File size: 14.0 KB

Line
1	EESchema Schematic File Version 4
2	LIBS:ramcard-cache
3	EELAYER 26 0
4	EELAYER END
5	$Descr User 10000 6000
6	encoding utf-8
7	Sheet 1 1
8	Title "Gemini 2020"
9	Date "2020-11-17"
10	Rev "1.0"
11	Comp "PulkoTronics"
12	Comment1 "2MB RAM expansion for Amstrad CPC 6128/Plus"
13	Comment2 ""
14	Comment3 ""
15	Comment4 ""
16	$EndDescr
17	Wire Wire Line
18	1050 2050 850 2050
19	Wire Wire Line
20	1050 1850 850 1850
21	Wire Wire Line
22	1850 2750 2000 2750
23	Wire Wire Line
24	1850 2650 2000 2650
25	Wire Wire Line
26	1850 2550 2000 2550
27	Wire Wire Line
28	1850 2450 2000 2450
29	Wire Wire Line
30	1850 2350 2000 2350
31	Wire Wire Line
32	1850 2250 2000 2250
33	Wire Wire Line
34	1850 1650 2000 1650
35	Wire Wire Line
36	1850 1450 2000 1450
37	Wire Wire Line
38	1850 1250 2000 1250
39	Wire Wire Line
40	1850 1050 2000 1050
41	Wire Wire Line
42	1850 1950 2150 1950
43	Wire Wire Line
44	1850 1750 2150 1750
45	Wire Wire Line
46	1850 3150 2000 3150
47	Wire Wire Line
48	1850 2950 2000 2950
49	Wire Wire Line
50	1050 850 850 850
51	Wire Wire Line
52	1050 2550 850 2550
53	Wire Wire Line
54	1050 2750 850 2750
55	Wire Wire Line
56	1050 3050 850 3050
57	Wire Wire Line
58	800 3350 800 3250
59	Wire Wire Line
60	800 3250 1050 3250
61	Wire Wire Line
62	800 2350 1050 2350
63	Wire Wire Line
64	800 2450 1050 2450
65	Wire Wire Line
66	1050 3150 850 3150
67	Wire Wire Line
68	1050 2850 850 2850
69	Wire Wire Line
70	1050 2650 850 2650
71	Wire Wire Line
72	1050 2250 850 2250
73	Wire Wire Line
74	1850 850 2000 850
75	Wire Wire Line
76	1850 3050 2000 3050
77	Wire Wire Line
78	1850 3250 2000 3250
79	Wire Wire Line
80	850 2950 1050 2950
81	Wire Wire Line
82	1850 1850 2150 1850
83	Wire Wire Line
84	1850 2050 2150 2050
85	Wire Wire Line
86	1850 950 2000 950
87	Wire Wire Line
88	1850 1150 2000 1150
89	Wire Wire Line
90	1850 1350 2000 1350
91	Wire Wire Line
92	1850 1550 2000 1550
93	Wire Wire Line
94	1050 950 900 950
95	Wire Wire Line
96	1050 1050 900 1050
97	Wire Wire Line
98	1050 1150 900 1150
99	Wire Wire Line
100	1050 1250 900 1250
101	Wire Wire Line
102	1050 1350 900 1350
103	Wire Wire Line
104	1050 1450 900 1450
105	Wire Wire Line
106	1050 1550 900 1550
107	Wire Wire Line
108	1050 1650 900 1650
109	Wire Wire Line
110	850 2150 1050 2150
111	Wire Wire Line
112	1850 2850 2050 2850
113	Wire Wire Line
114	1850 2150 2000 2150
115	Wire Wire Line
116	1050 1750 850 1750
117	Wire Wire Line
118	1050 1950 850 1950
119	Text GLabel 2000 2150 2 60 Output ~ 0
120	MREQ
121	NoConn ~ 2000 2650
122	NoConn ~ 2000 2550
123	NoConn ~ 2000 2450
124	NoConn ~ 2000 2250
125	$Comp
126	L power:VCC #PWR013
127	U 1 1 4DBBEA82
128	P 850 2150
129	F 0 "#PWR013" H 850 2250 30 0001 C CNN
130	F 1 "VCC" H 850 2250 30 0000 C CNN
131	F 2 "" H 850 2150 50 0001 C CNN
132	F 3 "" H 850 2150 50 0001 C CNN
133	1 850 2150
134	0 -1 -1 0
135	$EndComp
136	Text Label 900 950 0 60 ~ 0
137	A15
138	Text Label 2000 950 0 60 ~ 0
139	A14
140	Text Label 900 1050 0 60 ~ 0
141	A13
142	Text Label 2000 1050 0 60 ~ 0
143	A12
144	Text Label 900 1150 0 60 ~ 0
145	A11
146	Text Label 2000 1150 0 60 ~ 0
147	A10
148	Text Label 900 1250 0 60 ~ 0
149	A9
150	Text Label 2000 1250 0 60 ~ 0
151	A8
152	Text Label 900 1350 0 60 ~ 0
153	A7
154	Text Label 2000 1350 0 60 ~ 0
155	A6
156	Text Label 900 1450 0 60 ~ 0
157	A5
158	Text Label 2000 1450 0 60 ~ 0
159	A4
160	Text Label 900 1550 0 60 ~ 0
161	A3
162	Text Label 2000 1550 0 60 ~ 0
163	A2
164	Text Label 900 1650 0 60 ~ 0
165	A1
166	Text Label 2000 1650 0 60 ~ 0
167	A0
168	Text Label 850 1750 0 60 ~ 0
169	D7
170	Text Label 850 1850 0 60 ~ 0
171	D5
172	Text Label 850 1950 0 60 ~ 0
173	D3
174	Text Label 850 2050 0 60 ~ 0
175	D1
176	Text Label 2000 1750 0 60 ~ 0
177	D6
178	Text Label 2000 1850 0 60 ~ 0
179	D4
180	Text Label 2000 1950 0 60 ~ 0
181	D2
182	Text Label 2000 2050 0 60 ~ 0
183	D0
184	NoConn ~ 2000 3050
185	NoConn ~ 2000 3150
186	NoConn ~ 2000 3250
187	NoConn ~ 850 850
188	NoConn ~ 850 2250
189	NoConn ~ 850 2550
190	NoConn ~ 850 2650
191	NoConn ~ 850 2750
192	NoConn ~ 850 2950
193	NoConn ~ 850 3150
194	Text Notes 2360 1250 1 60 ~ 0
195	\ncpc connector
196	Text GLabel 800 2450 0 60 Output ~ 0
197	WR
198	$Comp
199	L ramcard-rescue:GND #PWR015
200	U 1 1 4CA89326
201	P 800 3350
202	F 0 "#PWR015" H 800 3350 30 0001 C CNN
203	F 1 "GND" H 800 3280 30 0001 C CNN
204	F 2 "" H 800 3350 50 0001 C CNN
205	F 3 "" H 800 3350 50 0001 C CNN
206	1 800 3350
207	1 0 0 -1
208	$EndComp
209	Text GLabel 800 2350 0 60 Output ~ 0
210	IORQ
211	$Comp
212	L ramcard-rescue:CONN_25X2 P1
213	U 1 1 4CA8712F
214	P 1450 2050
215	F 0 "P1" H 1450 3350 60 0000 C CNN
216	F 1 "CONN_25X2" V 1450 2050 50 0000 C CNN
217	F 2 "Connector_IDC:IDC-Header_2x25_P2.54mm_Vertical" H 1450 2050 50 0001 C CNN
218	F 3 "" H 1450 2050 50 0001 C CNN
219	1 1450 2050
220	1 0 0 -1
221	$EndComp
222	$Comp
223	L ramcard-rescue:GND #PWR0106
224	U 1 1 5EAC613B
225	P 1900 650
226	F 0 "#PWR0106" H 1900 650 30 0001 C CNN
227	F 1 "GND" H 1900 580 30 0001 C CNN
228	F 2 "" H 1900 650 50 0001 C CNN
229	F 3 "" H 1900 650 50 0001 C CNN
230	1 1900 650
231	0 1 1 0
232	$EndComp
233	Wire Wire Line
234	2000 850 2000 650
235	Wire Wire Line
236	2000 650 1900 650
237	NoConn ~ 2000 2350
238	Text GLabel 2000 2950 2 60 Output ~ 0
239	RAMRD
240	$Comp
241	L 74xx:74LS574 U2
242	U 1 1 5FB3A5F5
243	P 4200 3700
244	F 0 "U2" H 4200 4678 50 0000 C CNN
245	F 1 "74LS574" H 4400 4400 50 0000 C CNN
246	F 2 "Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm" H 4200 3700 50 0001 C CNN
247	F 3 "http://www.ti.com/lit/gpn/sn74LS574" H 4200 3700 50 0001 C CNN
248	1 4200 3700
249	1 0 0 -1
250	$EndComp
251	Text Label 7350 1950 2 50 ~ 0
252	D0
253	Text Label 7350 2050 2 50 ~ 0
254	D1
255	Text Label 7350 2350 2 50 ~ 0
256	D2
257	Text Label 7350 2450 2 50 ~ 0
258	D3
259	Text Label 8850 2550 0 50 ~ 0
260	D4
261	Text Label 8850 2450 0 50 ~ 0
262	D5
263	Text Label 8850 2150 0 50 ~ 0
264	D6
265	Text Label 8850 2050 0 50 ~ 0
266	D7
267	Text Label 7350 1750 2 50 ~ 0
268	A0
269	Text Label 7350 1650 2 50 ~ 0
270	A1
271	Text Label 7350 1550 2 50 ~ 0
272	A2
273	Text Label 7350 1450 2 50 ~ 0
274	A3
275	Text Label 7350 1350 2 50 ~ 0
276	A4
277	Text Label 8850 1450 0 50 ~ 0
278	A5
279	Text Label 8850 1550 0 50 ~ 0
280	A6
281	Text Label 8850 1650 0 50 ~ 0
282	A7
283	Text Label 8850 1950 0 50 ~ 0
284	A8
285	Text Label 8850 2650 0 50 ~ 0
286	A9
287	Text Label 8850 2750 0 50 ~ 0
288	A10
289	Text Label 8850 2850 0 50 ~ 0
290	A11
291	Text Label 8850 2950 0 50 ~ 0
292	A12
293	Text Label 8850 3050 0 50 ~ 0
294	A13
295	Text Label 8850 3150 0 50 ~ 0
296	XA14
297	Text GLabel 8950 1750 2 60 Output ~ 0
298	RAMRD
299	Text Label 4700 3900 0 50 ~ 0
300	XA16
301	Text Label 4700 3800 0 50 ~ 0
302	XA17
303	Text Label 4700 3700 0 50 ~ 0
304	XA18
305	Text Label 4700 3600 0 50 ~ 0
306	XA19
307	Text Label 4700 3500 0 50 ~ 0
308	XA20
309	Text Label 3700 3700 2 50 ~ 0
310	D5
311	Text Label 3700 3600 2 50 ~ 0
312	D4
313	Text Label 3700 3500 2 50 ~ 0
314	D3
315	Text Label 2250 3700 2 50 ~ 0
316	A7
317	Text Label 2250 4000 2 50 ~ 0
318	A8
319	Text Label 3700 4100 2 50 ~ 0
320	MMR
321	Text Label 4300 1200 0 50 ~ 0
322	MMR
323	Text Label 2700 2100 2 50 ~ 0
324	A15
325	Text Label 2700 2000 2 50 ~ 0
326	A14
327	Text Label 4300 1400 0 50 ~ 0
328	XA14
329	Text Label 4300 1500 0 50 ~ 0
330	XA15
331	Text Label 4300 1600 0 50 ~ 0
332	RAMDIS
333	Text Label 3700 3200 2 50 ~ 0
334	D0
335	Text Label 3700 3300 2 50 ~ 0
336	D1
337	Text Label 3700 3400 2 50 ~ 0
338	D2
339	Text Label 2700 1300 2 50 ~ 0
340	D6
341	Text Label 2700 1200 2 50 ~ 0
342	D7
343	Text Label 4700 3200 0 50 ~ 0
344	XD0
345	Text Label 4700 3300 0 50 ~ 0
346	XD1
347	Text Label 4700 3400 0 50 ~ 0
348	XD2
349	Text Label 4300 2000 0 50 ~ 0
350	XD0
351	Text Label 4300 1900 0 50 ~ 0
352	XD1
353	Text Label 4300 1800 0 50 ~ 0
354	XD2
355	Text Label 7350 3150 2 50 ~ 0
356	XA15
357	Text Label 7350 3050 2 50 ~ 0
358	XA16
359	Text Label 7350 2950 2 50 ~ 0
360	XA17
361	Text Label 7350 2850 2 50 ~ 0
362	XA18
363	Text Label 7350 2650 2 50 ~ 0
364	RAMWR
365	Text Label 2700 1400 2 50 ~ 0
366	D5
367	Text Label 2700 1500 2 50 ~ 0
368	D4
369	Text Label 2700 1600 2 50 ~ 0
370	D3
371	Text Notes 4600 1100 0 50 ~ 0
372	MMR = IORQ + WR + A15 + !A14 + !D6 + !D7
373	Text Label 8850 1850 0 50 ~ 0
374	RAMDIS
375	Text Notes 4600 1800 0 50 ~ 0
376	XA14 = A14 * !XD2 + XD0 * XD2
377	Text Notes 4600 1900 0 50 ~ 0
378	XA15 = A15 * !XD2 + XD1 * XD2
379	Text Notes 4600 2150 0 50 ~ 0
380	RAMDIS = (!XD2 * XD0 * A15 * A14)\n + (!XD2 * XD1 * !XD0)\n + (XD2 * !A15 * A14)
381	Text Notes 4600 1450 0 50 ~ 0
382	UNLOCK = ???\nRMR2 = (UNLOCK * !IORQ * !WR * !A15 * A14 * D7 * !D6 * D5)\nASIC.R = RMR2 * (D4 * D3) * RESET\n + !RMR2 * ASIC * RESET
383	Text Label 7350 1850 2 50 ~ 0
384	MREQ
385	$Comp
386	L power:VCC #PWR05
387	U 1 1 5FB4DD31
388	P 4200 2900
389	F 0 "#PWR05" H 4200 3000 30 0001 C CNN
390	F 1 "VCC" H 4200 3000 30 0000 C CNN
391	F 2 "" H 4200 2900 50 0001 C CNN
392	F 3 "" H 4200 2900 50 0001 C CNN
393	1 4200 2900
394	1 0 0 -1
395	$EndComp
396	$Comp
397	L power:VCC #PWR03
398	U 1 1 5FB4DD4E
399	P 4300 1000
400	F 0 "#PWR03" H 4300 1100 30 0001 C CNN
401	F 1 "VCC" H 4300 1100 30 0000 C CNN
402	F 2 "" H 4300 1000 50 0001 C CNN
403	F 3 "" H 4300 1000 50 0001 C CNN
404	1 4300 1000
405	1 0 0 -1
406	$EndComp
407	$Comp
408	L power:VCC #PWR07
409	U 1 1 5FB4DD65
410	P 8100 800
411	F 0 "#PWR07" H 8100 900 30 0001 C CNN
412	F 1 "VCC" H 8100 900 30 0000 C CNN
413	F 2 "" H 8100 800 50 0001 C CNN
414	F 3 "" H 8100 800 50 0001 C CNN
415	1 8100 800
416	1 0 0 -1
417	$EndComp
418	$Comp
419	L ramcard-rescue:GND #PWR06
420	U 1 1 5FB4DD7C
421	P 4200 4500
422	F 0 "#PWR06" H 4200 4500 30 0001 C CNN
423	F 1 "GND" H 4200 4430 30 0001 C CNN
424	F 2 "" H 4200 4500 50 0001 C CNN
425	F 3 "" H 4200 4500 50 0001 C CNN
426	1 4200 4500
427	1 0 0 -1
428	$EndComp
429	$Comp
430	L ramcard-rescue:GND #PWR04
431	U 1 1 5FB4DD93
432	P 2700 2300
433	F 0 "#PWR04" H 2700 2300 30 0001 C CNN
434	F 1 "GND" H 2700 2230 30 0001 C CNN
435	F 2 "" H 2700 2300 50 0001 C CNN
436	F 3 "" H 2700 2300 50 0001 C CNN
437	1 2700 2300
438	1 0 0 -1
439	$EndComp
440	$Comp
441	L ramcard-rescue:GND #PWR08
442	U 1 1 5FB4DDAA
443	P 8100 3450
444	F 0 "#PWR08" H 8100 3450 30 0001 C CNN
445	F 1 "GND" H 8100 3380 30 0001 C CNN
446	F 2 "" H 8100 3450 50 0001 C CNN
447	F 3 "" H 8100 3450 50 0001 C CNN
448	1 8100 3450
449	1 0 0 -1
450	$EndComp
451	$Comp
452	L power:VCC #PWR01
453	U 1 1 5FB4DE9C
454	P 1850 5100
455	F 0 "#PWR01" H 1850 5200 30 0001 C CNN
456	F 1 "VCC" H 1850 5200 30 0000 C CNN
457	F 2 "" H 1850 5100 50 0001 C CNN
458	F 3 "" H 1850 5100 50 0001 C CNN
459	1 1850 5100
460	1 0 0 -1
461	$EndComp
462	$Comp
463	L ramcard-rescue:GND #PWR02
464	U 1 1 5FB4DEB5
465	P 1850 5450
466	F 0 "#PWR02" H 1850 5450 30 0001 C CNN
467	F 1 "GND" H 1850 5380 30 0001 C CNN
468	F 2 "" H 1850 5450 50 0001 C CNN
469	F 3 "" H 1850 5450 50 0001 C CNN
470	1 1850 5450
471	1 0 0 -1
472	$EndComp
473	$Comp
474	L Device:C C1
475	U 1 1 5FB4DF4E
476	P 650 5250
477	F 0 "C1" H 765 5296 50 0000 L CNN
478	F 1 "C" H 765 5205 50 0000 L CNN
479	F 2 "Capacitor_SMD:C_1206_3216Metric" H 688 5100 50 0001 C CNN
480	F 3 "~" H 650 5250 50 0001 C CNN
481	1 650 5250
482	1 0 0 -1
483	$EndComp
484	$Comp
485	L Device:C C2
486	U 1 1 5FB4E00C
487	P 1050 5250
488	F 0 "C2" H 1165 5296 50 0000 L CNN
489	F 1 "C" H 1165 5205 50 0000 L CNN
490	F 2 "Capacitor_SMD:C_1206_3216Metric" H 1088 5100 50 0001 C CNN
491	F 3 "~" H 1050 5250 50 0001 C CNN
492	1 1050 5250
493	1 0 0 -1
494	$EndComp
495	$Comp
496	L Device:C C3
497	U 1 1 5FB4E067
498	P 1500 5250
499	F 0 "C3" H 1615 5296 50 0000 L CNN
500	F 1 "C" H 1615 5205 50 0000 L CNN
501	F 2 "Capacitor_SMD:C_1206_3216Metric" H 1538 5100 50 0001 C CNN
502	F 3 "~" H 1500 5250 50 0001 C CNN
503	1 1500 5250
504	1 0 0 -1
505	$EndComp
506	$Comp
507	L Device:CP C5
508	U 1 1 5FB4E0EC
509	P 2300 5250
510	F 0 "C5" H 2418 5296 50 0000 L CNN
511	F 1 "CP" H 2418 5205 50 0000 L CNN
512	F 2 "Capacitor_THT:CP_Radial_D5.0mm_P2.50mm" H 2338 5100 50 0001 C CNN
513	F 3 "~" H 2300 5250 50 0001 C CNN
514	1 2300 5250
515	1 0 0 -1
516	$EndComp
517	Wire Wire Line
518	650 5100 1050 5100
519	Wire Wire Line
520	1050 5100 1500 5100
521	Connection ~ 1050 5100
522	Connection ~ 1500 5100
523	Wire Wire Line
524	650 5400 1050 5400
525	Wire Wire Line
526	1050 5400 1500 5400
527	Connection ~ 1050 5400
528	Connection ~ 1500 5400
529	$Comp
530	L RAM:LY6220488 U4
531	U 1 1 5FB62A0C
532	P 8100 2250
533	F 0 "U4" H 8100 3515 50 0000 C CNN
534	F 1 "LY6220488" H 8100 3424 50 0000 C CNN
535	F 2 "Package_SO:TSOP-II-44_10.16x18.41mm_P0.8mm" H 8100 2250 50 0001 C CNN
536	F 3 "DOCUMENTATION" H 8100 2250 50 0001 C CNN
537	1 8100 2250
538	1 0 0 -1
539	$EndComp
540	Text Label 7350 2750 2 50 ~ 0
541	XA19
542	Text Label 7350 2550 2 50 ~ 0
543	XA20
544	Wire Wire Line
545	8850 1750 8950 1750
546	Text Label 2700 1100 2 50 ~ 0
547	IORQ
548	Text Label 4300 2100 0 50 ~ 0
549	WR
550	Text Notes 4600 1600 0 50 ~ 0
551	RAMWR = WR + (ASIC * !A15 * A14)
552	Text Label 4300 1300 0 50 ~ 0
553	RAMWR
554	Text Label 850 3050 2 50 ~ 0
555	RAMDIS
556	NoConn ~ 2050 2850
557	NoConn ~ 2000 2750
558	Wire Wire Line
559	3700 4200 3700 4450
560	Wire Wire Line
561	3700 4450 4200 4450
562	Wire Wire Line
563	4200 4450 4200 4500
564	Connection ~ 4200 4500
565	Text Label 4300 2200 0 50 ~ 0
566	RESET
567	Text Label 850 2850 2 50 ~ 0
568	RESET
569	$Comp
570	L ramcard-rescue:Switch_DSDP-byteeeprom SW1
571	U 1 1 5FBA3EE1
572	P 2700 3950
573	F 0 "SW1" H 2700 3450 60 0000 C CNN
574	F 1 "Switch_DSDP-byteeeprom" H 2700 3550 60 0000 C CNN
575	F 2 "Button_Switch_THT:SW_CuK_JS202011CQN_DPDT_Straight" H 2700 3950 50 0001 C CNN
576	F 3 "" H 2700 3950 50 0001 C CNN
577	1 2700 3950
578	-1 0 0 1
579	$EndComp
580	$Comp
581	L ramcard-rescue:GND #PWR0101
582	U 1 1 5FBA945B
583	P 2050 4350
584	F 0 "#PWR0101" H 2050 4350 30 0001 C CNN
585	F 1 "GND" H 2050 4280 30 0001 C CNN
586	F 2 "" H 2050 4350 50 0001 C CNN
587	F 3 "" H 2050 4350 50 0001 C CNN
588	1 2050 4350
589	1 0 0 -1
590	$EndComp
591	Wire Wire Line
592	2050 4350 2050 4200
593	Wire Wire Line
594	2050 3900 2250 3900
595	Wire Wire Line
596	2250 4200 2050 4200
597	Connection ~ 2050 4200
598	Wire Wire Line
599	2050 4200 2050 3900
600	Text Label 3150 3800 0 50 ~ 0
601	MA7
602	Text Label 3150 4100 0 50 ~ 0
603	MA8
604	Wire Wire Line
605	7350 2250 7050 2250
606	Wire Wire Line
607	7050 2250 7050 3400
608	Wire Wire Line
609	7050 3400 8100 3400
610	Wire Wire Line
611	9150 3400 9150 2250
612	Wire Wire Line
613	9150 2250 8850 2250
614	Wire Wire Line
615	8100 3450 8100 3400
616	Connection ~ 8100 3400
617	Wire Wire Line
618	8100 3400 9150 3400
619	Wire Wire Line
620	7350 2150 7100 2150
621	Wire Wire Line
622	7100 2150 7100 900
623	Wire Wire Line
624	7100 900 8100 900
625	Wire Wire Line
626	9350 900 9350 2350
627	Wire Wire Line
628	9350 2350 8850 2350
629	Wire Wire Line
630	8100 900 8100 800
631	Connection ~ 8100 900
632	Wire Wire Line
633	8100 900 9350 900
634	$Comp
635	L GAL:ATF750C-10SU U1
636	U 1 1 5FBC62C0
637	P 2700 1100
638	F 0 "U1" H 3500 1487 60 0000 C CNN
639	F 1 "ATF750C-10SU" H 3500 1381 60 0000 C CNN
640	F 2 "Package_SO:SOIC-24W_7.5x15.4mm_P1.27mm" H 3500 1340 60 0001 C CNN
641	F 3 "" H 2700 1100 60 0000 C CNN
642	1 2700 1100
643	1 0 0 -1
644	$EndComp
645	Wire Wire Line
646	4300 1100 4300 1000
647	Wire Wire Line
648	2700 2300 2700 2200
649	Text Label 2700 1700 2 50 ~ 0
650	D2
651	Text Label 2700 1800 2 50 ~ 0
652	D1
653	Text Label 2700 1900 2 50 ~ 0
654	D0
655	Wire Wire Line
656	3150 3800 3700 3800
657	Wire Wire Line
658	3150 4100 3450 4100
659	Wire Wire Line
660	3450 4100 3450 3900
661	Wire Wire Line
662	3450 3900 3700 3900
663	Wire Wire Line
664	1500 5100 1850 5100
665	Wire Wire Line
666	1500 5400 1850 5400
667	Connection ~ 1850 5100
668	Wire Wire Line
669	1850 5100 2300 5100
670	Wire Wire Line
671	1850 5450 1850 5400
672	Connection ~ 1850 5400
673	Wire Wire Line
674	1850 5400 2300 5400
675	$EndSCHEMATC

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source: avrstuff/CPC stuff/gemini/ramcard.sch@ 4e47de3

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