ramcard.sch@ 7d84448

main

Last change on this file since 7d84448 was 7d84448, checked in by PulkoMandy <pulkomandy@…>, 2 years ago
Gemini: update after review by Zik (thanks!)
Property mode set to `100644`
File size: 20.8 KB

Line
1	EESchema Schematic File Version 4
2	EELAYER 30 0
3	EELAYER END
4	$Descr User 10000 9054
5	encoding utf-8
6	Sheet 1 1
7	Title "Gemini 2020"
8	Date "2020-11-17"
9	Rev "1.0"
10	Comp "PulkoTronics"
11	Comment1 "2MB RAM expansion for Amstrad CPC 6128/Plus"
12	Comment2 ""
13	Comment3 ""
14	Comment4 ""
15	$EndDescr
16	Wire Wire Line
17	1050 2050 850 2050
18	Wire Wire Line
19	1050 1850 850 1850
20	Wire Wire Line
21	1550 2750 1700 2750
22	Wire Wire Line
23	1550 2650 1700 2650
24	Wire Wire Line
25	1550 2550 1700 2550
26	Wire Wire Line
27	1550 2450 1700 2450
28	Wire Wire Line
29	1550 2350 1700 2350
30	Wire Wire Line
31	1550 2250 1700 2250
32	Wire Wire Line
33	1550 1650 1700 1650
34	Wire Wire Line
35	1550 1450 1700 1450
36	Wire Wire Line
37	1550 1250 1700 1250
38	Wire Wire Line
39	1550 1050 1700 1050
40	Wire Wire Line
41	1550 1950 1850 1950
42	Wire Wire Line
43	1550 1750 1850 1750
44	Wire Wire Line
45	1550 3150 1700 3150
46	Wire Wire Line
47	1550 2950 1700 2950
48	Wire Wire Line
49	1050 850 850 850
50	Wire Wire Line
51	1050 2550 850 2550
52	Wire Wire Line
53	1050 2750 850 2750
54	Wire Wire Line
55	800 3350 800 3250
56	Wire Wire Line
57	800 3250 1050 3250
58	Wire Wire Line
59	800 2350 1050 2350
60	Wire Wire Line
61	800 2450 1050 2450
62	Wire Wire Line
63	1050 3150 850 3150
64	Wire Wire Line
65	1050 2850 850 2850
66	Wire Wire Line
67	1050 2650 850 2650
68	Wire Wire Line
69	1050 2250 850 2250
70	Wire Wire Line
71	1550 850 1700 850
72	Wire Wire Line
73	1550 3050 1700 3050
74	Wire Wire Line
75	1550 3250 1700 3250
76	Wire Wire Line
77	850 2950 1050 2950
78	Wire Wire Line
79	1550 1850 1850 1850
80	Wire Wire Line
81	1550 2050 1850 2050
82	Wire Wire Line
83	1550 950 1700 950
84	Wire Wire Line
85	1550 1150 1700 1150
86	Wire Wire Line
87	1550 1350 1700 1350
88	Wire Wire Line
89	1550 1550 1700 1550
90	Wire Wire Line
91	1050 950 900 950
92	Wire Wire Line
93	1050 1050 900 1050
94	Wire Wire Line
95	1050 1150 900 1150
96	Wire Wire Line
97	1050 1250 900 1250
98	Wire Wire Line
99	1050 1350 900 1350
100	Wire Wire Line
101	1050 1450 900 1450
102	Wire Wire Line
103	1050 1550 900 1550
104	Wire Wire Line
105	1050 1650 900 1650
106	Wire Wire Line
107	850 2150 1050 2150
108	Wire Wire Line
109	1550 2850 1750 2850
110	Wire Wire Line
111	1550 2150 1700 2150
112	Wire Wire Line
113	1050 1750 850 1750
114	Wire Wire Line
115	1050 1950 850 1950
116	NoConn ~ 1700 2650
117	NoConn ~ 1700 2550
118	NoConn ~ 1700 2450
119	NoConn ~ 1700 2250
120	$Comp
121	L power:VCC #PWR013
122	U 1 1 4DBBEA82
123	P 850 2150
124	F 0 "#PWR013" H 850 2250 30 0001 C CNN
125	F 1 "VCC" H 850 2250 30 0000 C CNN
126	F 2 "" H 850 2150 50 0001 C CNN
127	F 3 "" H 850 2150 50 0001 C CNN
128	1 850 2150
129	0 -1 -1 0
130	$EndComp
131	Text Label 900 950 0 60 ~ 0
132	A15
133	Text Label 1700 950 0 60 ~ 0
134	A14
135	Text Label 900 1050 0 60 ~ 0
136	A13
137	Text Label 1700 1050 0 60 ~ 0
138	A12
139	Text Label 900 1150 0 60 ~ 0
140	A11
141	Text Label 1700 1150 0 60 ~ 0
142	A10
143	Text Label 900 1250 0 60 ~ 0
144	A9
145	Text Label 1700 1250 0 60 ~ 0
146	A8
147	Text Label 900 1350 0 60 ~ 0
148	A7
149	Text Label 1700 1350 0 60 ~ 0
150	A6
151	Text Label 900 1450 0 60 ~ 0
152	A5
153	Text Label 1700 1450 0 60 ~ 0
154	A4
155	Text Label 900 1550 0 60 ~ 0
156	A3
157	Text Label 1700 1550 0 60 ~ 0
158	A2
159	Text Label 900 1650 0 60 ~ 0
160	A1
161	Text Label 1700 1650 0 60 ~ 0
162	A0
163	Text Label 850 1750 0 60 ~ 0
164	D7
165	Text Label 850 1850 0 60 ~ 0
166	D5
167	Text Label 850 1950 0 60 ~ 0
168	D3
169	Text Label 850 2050 0 60 ~ 0
170	D1
171	Text Label 1700 1750 0 60 ~ 0
172	D6
173	Text Label 1700 1850 0 60 ~ 0
174	D4
175	Text Label 1700 1950 0 60 ~ 0
176	D2
177	Text Label 1700 2050 0 60 ~ 0
178	D0
179	NoConn ~ 1700 3050
180	NoConn ~ 1700 3150
181	NoConn ~ 1700 3250
182	NoConn ~ 850 850
183	NoConn ~ 850 2250
184	NoConn ~ 850 2550
185	NoConn ~ 850 2650
186	NoConn ~ 850 2750
187	NoConn ~ 850 2950
188	NoConn ~ 850 3150
189	Text Notes 2060 1250 1 60 ~ 0
190	\ncpc connector
191	Wire Wire Line
192	1700 850 1700 650
193	Wire Wire Line
194	1700 650 1600 650
195	NoConn ~ 1700 2350
196	Text Label 7350 1950 2 50 ~ 0
197	D0
198	Text Label 7350 2050 2 50 ~ 0
199	D1
200	Text Label 7350 2350 2 50 ~ 0
201	D2
202	Text Label 7350 2450 2 50 ~ 0
203	D3
204	Text Label 8850 2550 0 50 ~ 0
205	D4
206	Text Label 8850 2450 0 50 ~ 0
207	D5
208	Text Label 8850 2150 0 50 ~ 0
209	D6
210	Text Label 8850 2050 0 50 ~ 0
211	D7
212	Text Label 7350 1750 2 50 ~ 0
213	A0
214	Text Label 7350 1650 2 50 ~ 0
215	A1
216	Text Label 7350 1550 2 50 ~ 0
217	A2
218	Text Label 7350 1450 2 50 ~ 0
219	A3
220	Text Label 7350 1350 2 50 ~ 0
221	A4
222	Text Label 8850 1450 0 50 ~ 0
223	A5
224	Text Label 8850 1550 0 50 ~ 0
225	A6
226	Text Label 8850 1650 0 50 ~ 0
227	A7
228	Text Label 8850 1950 0 50 ~ 0
229	A8
230	Text Label 8850 2650 0 50 ~ 0
231	A9
232	Text Label 8850 2750 0 50 ~ 0
233	A10
234	Text Label 8850 2850 0 50 ~ 0
235	A11
236	Text Label 8850 2950 0 50 ~ 0
237	A12
238	Text Label 8850 3050 0 50 ~ 0
239	A13
240	Text Label 8850 3150 0 50 ~ 0
241	XA14
242	Text Label 4700 3500 0 50 ~ 0
243	XA16
244	Text Label 4700 3600 0 50 ~ 0
245	XA17
246	Text Label 4700 3700 0 50 ~ 0
247	XA18
248	Text Label 4700 3800 0 50 ~ 0
249	XA19
250	Text Label 4700 3900 0 50 ~ 0
251	XA20
252	Text Label 3700 3700 2 50 ~ 0
253	D5
254	Text Label 3700 3600 2 50 ~ 0
255	D4
256	Text Label 3700 3500 2 50 ~ 0
257	D3
258	Text Label 2750 3700 2 50 ~ 0
259	A9
260	Text Label 2750 4250 2 50 ~ 0
261	A8
262	Text Label 3700 4100 2 50 ~ 0
263	~MMR
264	Text Label 4300 1200 0 50 ~ 0
265	~MMR
266	Text Label 2700 2100 2 50 ~ 0
267	A15
268	Text Label 2700 2000 2 50 ~ 0
269	A14
270	Text Label 4300 1400 0 50 ~ 0
271	XA14
272	Text Label 4300 1500 0 50 ~ 0
273	XA15
274	Text Label 4300 1600 0 50 ~ 0
275	RAMDIS
276	Text Label 3700 3200 2 50 ~ 0
277	D0
278	Text Label 3700 3300 2 50 ~ 0
279	D1
280	Text Label 3700 3400 2 50 ~ 0
281	D2
282	Text Label 2700 1300 2 50 ~ 0
283	D6
284	Text Label 2700 1200 2 50 ~ 0
285	D7
286	Text Label 4700 3200 0 50 ~ 0
287	XD0
288	Text Label 4700 3300 0 50 ~ 0
289	XD1
290	Text Label 4700 3400 0 50 ~ 0
291	XD2
292	Text Label 2700 1900 2 50 ~ 0
293	XD0
294	Text Label 2700 1800 2 50 ~ 0
295	XD1
296	Text Label 2700 1700 2 50 ~ 0
297	XD2
298	Text Label 7350 3150 2 50 ~ 0
299	XA15
300	Text Label 7350 3050 2 50 ~ 0
301	XA16
302	Text Label 7350 2950 2 50 ~ 0
303	XA17
304	Text Label 7350 2850 2 50 ~ 0
305	XA18
306	Text Label 7350 2650 2 50 ~ 0
307	~RAMWR
308	Text Label 2700 1400 2 50 ~ 0
309	D5
310	Text Label 2700 1500 2 50 ~ 0
311	D4
312	Text Label 2700 1600 2 50 ~ 0
313	D3
314	Text Notes 4600 1100 0 50 ~ 0
315	~MMR~ = ~IORQ~ + ~WR~ + A15 + !A14 + !D6 + !D7
316	Text Label 8850 1850 0 50 ~ 0
317	RAMDIS
318	Text Notes 4600 1800 0 50 ~ 0
319	XA14 = A14 * !XD2 + XD0 * XD2
320	Text Notes 4600 2050 0 50 ~ 0
321	XA15 = A15 * !XD2 + XD1 * XD2\n\n~CRTC~ = ~IORQ~ + ~WR~ + A14
322	Text Notes 4600 2350 0 50 ~ 0
323	RAMDIS = (!XD2 * XD0 * A15 * A14)\n + (!XD2 * XD1 * !XD0)\n + (XD2 * !A15 * A14)
324	Text Notes 4600 1450 0 50 ~ 0
325	RMR2 = UNLOCK * !~IORQ~ * !~WR~ * !A15 * A14 * D7 * !D6 * D5\nASIC.R = RMR2 * (D4 * D3) * ~RESET\n + !RMR2 * ASIC * ~RESET
326	Text Label 7350 1850 2 50 ~ 0
327	~MREQ
328	$Comp
329	L power:VCC #PWR05
330	U 1 1 5FB4DD31
331	P 4200 2900
332	F 0 "#PWR05" H 4200 3000 30 0001 C CNN
333	F 1 "VCC" H 4200 3000 30 0000 C CNN
334	F 2 "" H 4200 2900 50 0001 C CNN
335	F 3 "" H 4200 2900 50 0001 C CNN
336	1 4200 2900
337	1 0 0 -1
338	$EndComp
339	$Comp
340	L power:VCC #PWR03
341	U 1 1 5FB4DD4E
342	P 4300 1000
343	F 0 "#PWR03" H 4300 1100 30 0001 C CNN
344	F 1 "VCC" H 4300 1100 30 0000 C CNN
345	F 2 "" H 4300 1000 50 0001 C CNN
346	F 3 "" H 4300 1000 50 0001 C CNN
347	1 4300 1000
348	1 0 0 -1
349	$EndComp
350	$Comp
351	L power:VCC #PWR07
352	U 1 1 5FB4DD65
353	P 8100 800
354	F 0 "#PWR07" H 8100 900 30 0001 C CNN
355	F 1 "VCC" H 8100 900 30 0000 C CNN
356	F 2 "" H 8100 800 50 0001 C CNN
357	F 3 "" H 8100 800 50 0001 C CNN
358	1 8100 800
359	1 0 0 -1
360	$EndComp
361	$Comp
362	L power:VCC #PWR01
363	U 1 1 5FB4DE9C
364	P 2900 6150
365	F 0 "#PWR01" H 2900 6250 30 0001 C CNN
366	F 1 "VCC" H 2900 6250 30 0000 C CNN
367	F 2 "" H 2900 6150 50 0001 C CNN
368	F 3 "" H 2900 6150 50 0001 C CNN
369	1 2900 6150
370	1 0 0 -1
371	$EndComp
372	$Comp
373	L Device:C C1
374	U 1 1 5FB4DF4E
375	P 1700 6300
376	F 0 "C1" H 1815 6346 50 0000 L CNN
377	F 1 "C" H 1815 6255 50 0000 L CNN
378	F 2 "Capacitors_SMD:C_1206" H 1738 6150 50 0001 C CNN
379	F 3 "~" H 1700 6300 50 0001 C CNN
380	1 1700 6300
381	1 0 0 -1
382	$EndComp
383	$Comp
384	L Device:C C2
385	U 1 1 5FB4E00C
386	P 2100 6300
387	F 0 "C2" H 2215 6346 50 0000 L CNN
388	F 1 "C" H 2215 6255 50 0000 L CNN
389	F 2 "Capacitors_SMD:C_1206" H 2138 6150 50 0001 C CNN
390	F 3 "~" H 2100 6300 50 0001 C CNN
391	1 2100 6300
392	1 0 0 -1
393	$EndComp
394	$Comp
395	L Device:C C3
396	U 1 1 5FB4E067
397	P 2550 6300
398	F 0 "C3" H 2665 6346 50 0000 L CNN
399	F 1 "C" H 2665 6255 50 0000 L CNN
400	F 2 "Capacitors_SMD:C_1206" H 2588 6150 50 0001 C CNN
401	F 3 "~" H 2550 6300 50 0001 C CNN
402	1 2550 6300
403	1 0 0 -1
404	$EndComp
405	$Comp
406	L Device:CP C5
407	U 1 1 5FB4E0EC
408	P 3350 6300
409	F 0 "C5" H 3468 6346 50 0000 L CNN
410	F 1 "CP" H 3468 6255 50 0000 L CNN
411	F 2 "Capacitor_THT:CP_Radial_D5.0mm_P2.50mm" H 3388 6150 50 0001 C CNN
412	F 3 "~" H 3350 6300 50 0001 C CNN
413	1 3350 6300
414	1 0 0 -1
415	$EndComp
416	Wire Wire Line
417	1700 6150 2100 6150
418	Wire Wire Line
419	2100 6150 2550 6150
420	Connection ~ 2100 6150
421	Connection ~ 2550 6150
422	Wire Wire Line
423	1700 6450 2100 6450
424	Wire Wire Line
425	2100 6450 2550 6450
426	Connection ~ 2100 6450
427	Connection ~ 2550 6450
428	$Comp
429	L RAM:LY6220488 U4
430	U 1 1 5FB62A0C
431	P 8100 2250
432	F 0 "U4" H 8100 3515 50 0000 C CNN
433	F 1 "LY6220488" H 8100 3424 50 0000 C CNN
434	F 2 "Package_SO:TSOP-II-44_10.16x18.41mm_P0.8mm" H 8100 2250 50 0001 C CNN
435	F 3 "DOCUMENTATION" H 8100 2250 50 0001 C CNN
436	1 8100 2250
437	1 0 0 -1
438	$EndComp
439	Text Label 7350 2750 2 50 ~ 0
440	XA19
441	Text Label 7350 2550 2 50 ~ 0
442	XA20
443	Text Label 2700 1100 2 50 ~ 0
444	~IORQ
445	Text Label 4300 2100 0 50 ~ 0
446	~WR
447	Text Notes 4600 1600 0 50 ~ 0
448	~RAMWR~ = ~WR~ + (ASIC * !A15 * A14)
449	Text Label 4300 1300 0 50 ~ 0
450	~RAMWR
451	Text Label 600 4050 0 50 ~ 0
452	RAMDIS
453	NoConn ~ 1750 2850
454	NoConn ~ 1700 2750
455	Text Label 4300 2200 0 50 ~ 0
456	~RESET
457	Text Label 850 2850 2 50 ~ 0
458	~RESET
459	Wire Wire Line
460	2550 3900 2750 3900
461	Text Label 3150 3800 0 50 ~ 0
462	MA7
463	Text Label 3150 4350 0 50 ~ 0
464	MA8
465	Wire Wire Line
466	7350 2250 7050 2250
467	Wire Wire Line
468	7050 2250 7050 3400
469	Wire Wire Line
470	7050 3400 8100 3400
471	Wire Wire Line
472	9150 3400 9150 2250
473	Wire Wire Line
474	9150 2250 8850 2250
475	Wire Wire Line
476	8100 3450 8100 3400
477	Connection ~ 8100 3400
478	Wire Wire Line
479	8100 3400 9150 3400
480	Wire Wire Line
481	7350 2150 7100 2150
482	Wire Wire Line
483	7100 2150 7100 900
484	Wire Wire Line
485	7100 900 8100 900
486	Wire Wire Line
487	9350 900 9350 2350
488	Wire Wire Line
489	9350 2350 8850 2350
490	Wire Wire Line
491	8100 900 8100 800
492	Connection ~ 8100 900
493	Wire Wire Line
494	8100 900 9350 900
495	Wire Wire Line
496	4300 1100 4300 1000
497	Wire Wire Line
498	2700 2300 2700 2200
499	Wire Wire Line
500	3150 3800 3700 3800
501	Wire Wire Line
502	3450 3900 3700 3900
503	Wire Wire Line
504	2550 6150 2900 6150
505	Wire Wire Line
506	2550 6450 2900 6450
507	Connection ~ 2900 6150
508	Wire Wire Line
509	2900 6150 3350 6150
510	Wire Wire Line
511	2900 6500 2900 6450
512	Connection ~ 2900 6450
513	Wire Wire Line
514	2900 6450 3350 6450
515	$Comp
516	L ATF22v10:ATF22V10C-10SU U1
517	U 1 1 6192A276
518	P 2700 1100
519	F 0 "U1" H 3500 1487 60 0000 C CNN
520	F 1 "ATF22V10C-10SU" H 3500 1381 60 0000 C CNN
521	F 2 "Housings_SOIC:SOIC-24W_7.5x15.4mm_Pitch1.27mm" H 3500 1340 60 0001 C CNN
522	F 3 "" H 2700 1100 60 0000 C CNN
523	1 2700 1100
524	1 0 0 -1
525	$EndComp
526	Text Label 4300 1700 0 50 ~ 0
527	UNLOCK
528	$Comp
529	L Device:C C6
530	U 1 1 61B5E5C9
531	P 1350 6300
532	F 0 "C6" H 1465 6346 50 0000 L CNN
533	F 1 "C" H 1465 6255 50 0000 L CNN
534	F 2 "Capacitors_SMD:C_1206" H 1388 6150 50 0001 C CNN
535	F 3 "~" H 1350 6300 50 0001 C CNN
536	1 1350 6300
537	1 0 0 -1
538	$EndComp
539	$Comp
540	L Device:C C4
541	U 1 1 61B5E739
542	P 950 6300
543	F 0 "C4" H 1065 6346 50 0000 L CNN
544	F 1 "C" H 1065 6255 50 0000 L CNN
545	F 2 "Capacitors_SMD:C_1206" H 988 6150 50 0001 C CNN
546	F 3 "~" H 950 6300 50 0001 C CNN
547	1 950 6300
548	1 0 0 -1
549	$EndComp
550	Wire Wire Line
551	1700 6150 1350 6150
552	Connection ~ 1700 6150
553	Wire Wire Line
554	1350 6150 950 6150
555	Connection ~ 1350 6150
556	Wire Wire Line
557	950 6450 1350 6450
558	Wire Wire Line
559	1700 6450 1350 6450
560	Connection ~ 1700 6450
561	Connection ~ 1350 6450
562	$Comp
563	L power:GND #PWR014
564	U 1 1 61B901D3
565	P 8100 3450
566	F 0 "#PWR014" H 8100 3200 50 0001 C CNN
567	F 1 "GND" H 8105 3277 50 0000 C CNN
568	F 2 "" H 8100 3450 50 0001 C CNN
569	F 3 "" H 8100 3450 50 0001 C CNN
570	1 8100 3450
571	1 0 0 -1
572	$EndComp
573	$Comp
574	L power:GND #PWR010
575	U 1 1 61B9081A
576	P 4200 4500
577	F 0 "#PWR010" H 4200 4250 50 0001 C CNN
578	F 1 "GND" H 4205 4327 50 0000 C CNN
579	F 2 "" H 4200 4500 50 0001 C CNN
580	F 3 "" H 4200 4500 50 0001 C CNN
581	1 4200 4500
582	1 0 0 -1
583	$EndComp
584	$Comp
585	L power:GND #PWR06
586	U 1 1 61B90C22
587	P 2550 4600
588	F 0 "#PWR06" H 2550 4350 50 0001 C CNN
589	F 1 "GND" H 2400 4550 50 0000 C CNN
590	F 2 "" H 2550 4600 50 0001 C CNN
591	F 3 "" H 2550 4600 50 0001 C CNN
592	1 2550 4600
593	1 0 0 -1
594	$EndComp
595	$Comp
596	L power:GND #PWR09
597	U 1 1 61B90FC4
598	P 2900 6500
599	F 0 "#PWR09" H 2900 6250 50 0001 C CNN
600	F 1 "GND" H 2905 6327 50 0000 C CNN
601	F 2 "" H 2900 6500 50 0001 C CNN
602	F 3 "" H 2900 6500 50 0001 C CNN
603	1 2900 6500
604	1 0 0 -1
605	$EndComp
606	$Comp
607	L power:GND #PWR02
608	U 1 1 61B91A59
609	P 800 3350
610	F 0 "#PWR02" H 800 3100 50 0001 C CNN
611	F 1 "GND" H 805 3177 50 0000 C CNN
612	F 2 "" H 800 3350 50 0001 C CNN
613	F 3 "" H 800 3350 50 0001 C CNN
614	1 800 3350
615	1 0 0 -1
616	$EndComp
617	$Comp
618	L power:GND #PWR04
619	U 1 1 61B91D3F
620	P 1600 650
621	F 0 "#PWR04" H 1600 400 50 0001 C CNN
622	F 1 "GND" H 1605 477 50 0000 C CNN
623	F 2 "" H 1600 650 50 0001 C CNN
624	F 3 "" H 1600 650 50 0001 C CNN
625	1 1600 650
626	1 0 0 -1
627	$EndComp
628	$Comp
629	L Connector_Generic:Conn_02x25_Odd_Even J1
630	U 1 1 61B927B8
631	P 1250 2050
632	F 0 "J1" H 1300 3467 50 0000 C CNN
633	F 1 "Conn_02x25_Odd_Even" H 1300 3376 50 0000 C CNN
634	F 2 "Pin_Headers:Pin_Header_Straight_2x25_Pitch2.54mm" H 1250 2050 50 0001 C CNN
635	F 3 "~" H 1250 2050 50 0001 C CNN
636	1 1250 2050
637	1 0 0 -1
638	$EndComp
639	$Comp
640	L power:GND #PWR08
641	U 1 1 61BA39EC
642	P 2700 2300
643	F 0 "#PWR08" H 2700 2050 50 0001 C CNN
644	F 1 "GND" H 2705 2127 50 0000 C CNN
645	F 2 "" H 2700 2300 50 0001 C CNN
646	F 3 "" H 2700 2300 50 0001 C CNN
647	1 2700 2300
648	1 0 0 -1
649	$EndComp
650	$Comp
651	L Switch:SW_DPDT_x2 SW1
652	U 1 1 61BA57BE
653	P 2950 3800
654	F 0 "SW1" H 2950 3475 50 0000 C CNN
655	F 1 "SW_DPDT_x2" H 2950 3566 50 0000 C CNN
656	F 2 "Buttons_Switches_ThroughHole:SW_CuK_JS202011CQN_DPDT_Straight" H 2950 3800 50 0001 C CNN
657	F 3 "~" H 2950 3800 50 0001 C CNN
658	1 2950 3800
659	-1 0 0 1
660	$EndComp
661	$Comp
662	L Switch:SW_DPDT_x2 SW1
663	U 2 1 61BA6969
664	P 2950 4350
665	F 0 "SW1" H 2950 4025 50 0000 C CNN
666	F 1 "SW_DPDT_x2" H 2950 4116 50 0000 C CNN
667	F 2 "Buttons_Switches_ThroughHole:SW_CuK_JS202011CQN_DPDT_Straight" H 2950 4350 50 0001 C CNN
668	F 3 "~" H 2950 4350 50 0001 C CNN
669	2 2950 4350
670	-1 0 0 1
671	$EndComp
672	Wire Wire Line
673	2550 3900 2550 4450
674	Wire Wire Line
675	2750 4450 2550 4450
676	Connection ~ 2550 4450
677	Wire Wire Line
678	2550 4450 2550 4600
679	Wire Wire Line
680	3150 4350 3450 4350
681	Wire Wire Line
682	3450 3900 3450 4350
683	Text Label 4300 1800 0 50 ~ 0
684	ASIC
685	Text Label 4300 2000 0 50 ~ 0
686	~CRTC
687	Connection ~ 7500 4050
688	$Comp
689	L power:VCC #PWR012
690	U 1 1 61B91779
691	P 7500 4050
692	F 0 "#PWR012" H 7500 4150 30 0001 C CNN
693	F 1 "VCC" H 7500 4150 30 0000 C CNN
694	F 2 "" H 7500 4050 50 0001 C CNN
695	F 3 "" H 7500 4050 50 0001 C CNN
696	1 7500 4050
697	1 0 0 -1
698	$EndComp
699	Connection ~ 5600 6350
700	$Comp
701	L power:GND #PWR011
702	U 1 1 61B9147E
703	P 5600 6350
704	F 0 "#PWR011" H 5600 6100 50 0001 C CNN
705	F 1 "GND" H 5605 6177 50 0000 C CNN
706	F 2 "" H 5600 6350 50 0001 C CNN
707	F 3 "" H 5600 6350 50 0001 C CNN
708	1 5600 6350
709	1 0 0 -1
710	$EndComp
711	Wire Wire Line
712	7200 6350 8000 6350
713	Connection ~ 7200 6350
714	Wire Wire Line
715	7200 5150 7200 6350
716	Wire Wire Line
717	8000 6350 8500 6350
718	Connection ~ 8000 6350
719	Wire Wire Line
720	8000 6050 8000 6350
721	Wire Wire Line
722	5600 6350 7200 6350
723	Wire Wire Line
724	5600 5150 5600 6350
725	Wire Wire Line
726	7200 4050 7500 4050
727	Text Label 5300 4450 0 50 ~ 0
728	A9
729	Text Label 5300 4350 0 50 ~ 0
730	A8
731	Text Label 5300 4150 0 50 ~ 0
732	~CRTC
733	Text Label 5300 4050 0 50 ~ 0
734	CLKIN
735	Wire Wire Line
736	7200 4550 8000 4550
737	Wire Wire Line
738	7200 4450 8000 4450
739	Wire Wire Line
740	7200 4350 8000 4350
741	Text Label 5300 4250 0 50 ~ 0
742	NCO
743	Text Label 7200 4250 0 50 ~ 0
744	UNLOCK
745	Wire Wire Line
746	5300 4650 5600 4650
747	Wire Wire Line
748	5300 4250 5600 4250
749	$Comp
750	L ATF22v10:ATF22V10C-10SU U3
751	U 1 1 6192C385
752	P 5600 4050
753	F 0 "U3" H 6400 4437 60 0000 C CNN
754	F 1 "ATF22V10C-10SU" H 6400 4331 60 0000 C CNN
755	F 2 "Housings_SOIC:SOIC-24W_7.5x15.4mm_Pitch1.27mm" H 6400 4290 60 0001 C CNN
756	F 3 "" H 5600 4050 60 0000 C CNN
757	1 5600 4050
758	1 0 0 -1
759	$EndComp
760	Text Label 5300 4650 0 50 ~ 0
761	~RESET
762	Wire Wire Line
763	7850 5850 8000 5850
764	Wire Wire Line
765	7850 5750 8000 5750
766	Wire Wire Line
767	7850 5650 8000 5650
768	Wire Wire Line
769	7850 5550 8000 5550
770	Wire Wire Line
771	7850 5450 8000 5450
772	Wire Wire Line
773	7850 5350 8000 5350
774	Wire Wire Line
775	7850 5250 8000 5250
776	Wire Wire Line
777	7850 5150 8000 5150
778	Text Label 7850 5150 0 50 ~ 0
779	D7
780	Text Label 7850 5250 0 50 ~ 0
781	D6
782	Text Label 7850 5350 0 50 ~ 0
783	D5
784	Text Label 7850 5450 0 50 ~ 0
785	D4
786	Text Label 7850 5850 0 50 ~ 0
787	D3
788	Text Label 7850 5750 0 50 ~ 0
789	D2
790	Text Label 7850 5650 0 50 ~ 0
791	D1
792	Text Label 7850 5550 0 50 ~ 0
793	D0
794	Text Label 7600 4250 0 50 ~ 0
795	PRBS7
796	Text Label 7600 4350 0 50 ~ 0
797	PRBS6
798	Text Label 7600 4450 0 50 ~ 0
799	PRBS5
800	Text Label 7600 4550 0 50 ~ 0
801	PRBS4
802	Text Label 7200 4950 0 50 ~ 0
803	PRBS0
804	Text Label 7200 4850 0 50 ~ 0
805	PRBS1
806	Text Label 7200 4750 0 50 ~ 0
807	PRBS2
808	Text Label 7200 4650 0 50 ~ 0
809	PRBS3
810	Wire Wire Line
811	7500 4050 8300 4050
812	Wire Wire Line
813	7750 4950 8000 4950
814	Wire Wire Line
815	7750 4850 8000 4850
816	Wire Wire Line
817	7750 4750 8000 4750
818	Wire Wire Line
819	7750 4650 8000 4650
820	Text Label 7750 4950 0 50 ~ 0
821	PRBS3
822	Text Label 7750 4850 0 50 ~ 0
823	PRBS2
824	Text Label 7750 4750 0 50 ~ 0
825	PRBS1
826	Text Label 7750 4650 0 50 ~ 0
827	PRBS0
828	Text Label 9000 4250 0 50 ~ 0
829	NCO
830	Wire Wire Line
831	8300 4050 8300 3950
832	Wire Wire Line
833	8300 3950 8500 3950
834	$Comp
835	L 74xx:74LS688 U5
836	U 1 1 616423BA
837	P 8500 5150
838	F 0 "U5" H 9044 5196 50 0000 L CNN
839	F 1 "74LS688" H 9044 5105 50 0000 L CNN
840	F 2 "Housings_SOIC:SOIC-20W_7.5x12.8mm_Pitch1.27mm" H 8500 5150 50 0001 C CNN
841	F 3 "http://www.ti.com/lit/gpn/sn74LS688" H 8500 5150 50 0001 C CNN
842	1 8500 5150
843	1 0 0 -1
844	$EndComp
845	Text Label 4300 1900 0 50 ~ 0
846	RMR2
847	Wire Wire Line
848	5300 4150 5600 4150
849	Text Notes 650 5950 0 50 ~ 0
850	STATE13 = !(PRBS0 * !PRBS1 * PRBS2 * PRBS3 * !PRBS4 * !PRBS5 * PRBS6 * PRBS7)\nUNLOCK.R = (UNLOCK * STATE13)\n + (!UNLOCK * !PRBS0 * PRBS1 * PRBS2 * PRBS3 * !PRBS4 * PRBS5 * PRBS6 * PRBS7)\n\nPRBS0.R = PRBS1 + NCO\nPRBS1.R = PRBS2 + NCO\nPRBS2.R = PRBS3 + NCO\nPRBS3.R = (PRBS0 XOR PRBS1) + NCO = (PRBS0* !PRBS1) + (!PRBS0 * PRBS1) + NCO\nPRBS4.R = PRBS5 + NCO\nPRBS5.R = PRBS6 + NCO\nPRBS6.R = PRBS7 + NCO\nPRBS7.R = (PRBS4 XOR PRBS7) + NCO = (PRBS4* !PRBS7) + (!PRBS4 * PRBS7) + NCO\n\nCLKOUT = ~CRTC~ + A9 + A8\nAR=!~RESET
851	Wire Wire Line
852	5300 4050 5600 4050
853	Wire Wire Line
854	7200 5050 6400 5050
855	Wire Wire Line
856	6400 5050 6400 4050
857	Wire Wire Line
858	6400 4050 5600 4050
859	Connection ~ 5600 4050
860	Wire Wire Line
861	5300 4350 5600 4350
862	Wire Wire Line
863	5300 4450 5600 4450
864	Text Label 7200 5050 0 50 ~ 0
865	CLKOUT
866	Wire Wire Line
867	8000 4250 7600 4250
868	Wire Wire Line
869	7200 4150 7600 4150
870	Wire Wire Line
871	7600 4150 7600 4250
872	$Comp
873	L Device:LED D1
874	U 1 1 61E50A5C
875	P 5750 2800
876	F 0 "D1" H 5743 3017 50 0000 C CNN
877	F 1 "LED" H 5743 2926 50 0000 C CNN
878	F 2 "LEDs:LED_D5.0mm" H 5750 2800 50 0001 C CNN
879	F 3 "~" H 5750 2800 50 0001 C CNN
880	1 5750 2800
881	1 0 0 -1
882	$EndComp
883	$Comp
884	L Device:LED D2
885	U 1 1 61E511A8
886	P 5750 3200
887	F 0 "D2" H 5743 3417 50 0000 C CNN
888	F 1 "LED" H 5743 3326 50 0000 C CNN
889	F 2 "LEDs:LED_D5.0mm" H 5750 3200 50 0001 C CNN
890	F 3 "~" H 5750 3200 50 0001 C CNN
891	1 5750 3200
892	1 0 0 -1
893	$EndComp
894	$Comp
895	L Device:R R1
896	U 1 1 61E51890
897	P 6050 2800
898	F 0 "R1" V 5843 2800 50 0000 C CNN
899	F 1 "R" V 5934 2800 50 0000 C CNN
900	F 2 "Resistors_SMD:R_0805" V 5980 2800 50 0001 C CNN
901	F 3 "~" H 6050 2800 50 0001 C CNN
902	1 6050 2800
903	0 1 1 0
904	$EndComp
905	$Comp
906	L Device:R R2
907	U 1 1 61E51CEA
908	P 6050 3200
909	F 0 "R2" V 5843 3200 50 0000 C CNN
910	F 1 "R" V 5934 3200 50 0000 C CNN
911	F 2 "Resistors_SMD:R_0805" V 5980 3200 50 0001 C CNN
912	F 3 "~" H 6050 3200 50 0001 C CNN
913	1 6050 3200
914	0 1 1 0
915	$EndComp
916	Wire Wire Line
917	6200 3200 6200 2800
918	Text Label 5600 2800 2 50 ~ 0
919	UNLOCK
920	Text Label 5600 3200 2 50 ~ 0
921	ASIC
922	$Comp
923	L power:GND #PWR0101
924	U 1 1 61E5800A
925	P 6200 3200
926	F 0 "#PWR0101" H 6200 2950 50 0001 C CNN
927	F 1 "GND" H 6205 3027 50 0000 C CNN
928	F 2 "" H 6200 3200 50 0001 C CNN
929	F 3 "" H 6200 3200 50 0001 C CNN
930	1 6200 3200
931	1 0 0 -1
932	$EndComp
933	Connection ~ 6200 3200
934	Text Label 800 2350 0 50 ~ 0
935	~IORQ
936	Text Label 800 2450 0 50 ~ 0
937	~WR
938	$Comp
939	L pspice:DIODE D3
940	U 1 1 6165927E
941	P 600 3700
942	F 0 "D3" V 646 3572 50 0000 R CNN
943	F 1 "DIODE" V 555 3572 50 0000 R CNN
944	F 2 "Diodes_SMD:D_1206" H 600 3700 50 0001 C CNN
945	F 3 "~" H 600 3700 50 0001 C CNN
946	1 600 3700
947	0 -1 -1 0
948	$EndComp
949	Wire Wire Line
950	600 3500 600 3050
951	Wire Wire Line
952	600 3050 1050 3050
953	Wire Wire Line
954	600 4050 600 3900
955	Text Label 1700 2950 0 50 ~ 0
956	~RAMRD
957	Text Label 8850 1750 0 50 ~ 0
958	~RAMRD
959	Text Label 1700 2150 0 50 ~ 0
960	~MREQ
961	$Comp
962	L 74xx:74AHCT273 U2
963	U 1 1 61EB5442
964	P 4200 3700
965	F 0 "U2" H 4350 4500 50 0000 C CNN
966	F 1 "74AHCT273" H 4450 4400 50 0000 C CNN
967	F 2 "Housings_SOIC:SOIC-20W_7.5x12.8mm_Pitch1.27mm" H 4200 3700 50 0001 C CNN
968	F 3 "https://assets.nexperia.com/documents/data-sheet/74AHC_AHCT273.pdf" H 4200 3700 50 0001 C CNN
969	1 4200 3700
970	1 0 0 -1
971	$EndComp
972	Text Label 3500 4200 0 50 ~ 0
973	~RESET
974	Wire Wire Line
975	3500 4200 3700 4200
976	$EndSCHEMATC

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source: avrstuff/CPC stuff/gemini/ramcard.sch@ 7d84448

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