# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1675777891 -3600
# Node ID dd9a3c03f3fdae544d8b48d3a7a61fdd0e4f9914
# Parent  08b8473ab24475733566fce8771925d8ab0a3c10
Added dedicated CSYNC sheet to try and consolidate sync processing.

diff -r 08b8473ab244 -r dd9a3c03f3fd AcornElectronMainboard.sch
--- a/AcornElectronMainboard.sch	Tue Feb 07 14:28:37 2023 +0100
+++ b/AcornElectronMainboard.sch	Tue Feb 07 14:51:31 2023 +0100
@@ -4,7 +4,7 @@
 EELAYER END
 $Descr A4 8268 11693 portrait
 encoding utf-8
-Sheet 1 10
+Sheet 1 11
 Title "Acorn Electron Mainboard"
 Date ""
 Rev ""
@@ -717,4 +717,10 @@
 	2100 5400 2100 6100
 Wire Bus Line
 	2100 3800 2100 5300
+$Sheet
+S 4300 9500 700  300 
+U 63E3F56E
+F0 "CSYNC" 50
+F1 "CSYNC.sch" 50
+$EndSheet
 $EndSCHEMATC
diff -r 08b8473ab244 -r dd9a3c03f3fd CPU_ROM_KBD.sch
--- a/CPU_ROM_KBD.sch	Tue Feb 07 14:28:37 2023 +0100
+++ b/CPU_ROM_KBD.sch	Tue Feb 07 14:51:31 2023 +0100
@@ -4,7 +4,7 @@
 EELAYER END
 $Descr A4 11693 8268
 encoding utf-8
-Sheet 7 10
+Sheet 7 11
 Title ""
 Date ""
 Rev ""
diff -r 08b8473ab244 -r dd9a3c03f3fd CSYNC.sch
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CSYNC.sch	Tue Feb 07 14:51:31 2023 +0100
@@ -0,0 +1,341 @@
+EESchema Schematic File Version 4
+LIBS:AcornElectronMainboard-cache
+EELAYER 26 0
+EELAYER END
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+Date ""
+Rev ""
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+Comment2 ""
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+Comment4 ""
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diff -r 08b8473ab244 -r dd9a3c03f3fd RAM.sch
--- a/RAM.sch	Tue Feb 07 14:28:37 2023 +0100
+++ b/RAM.sch	Tue Feb 07 14:51:31 2023 +0100
@@ -4,7 +4,7 @@
 EELAYER END
 $Descr A4 11693 8268
 encoding utf-8
-Sheet 3 10
+Sheet 3 11
 Title ""
 Date ""
 Rev ""
diff -r 08b8473ab244 -r dd9a3c03f3fd UHF.sch
--- a/UHF.sch	Tue Feb 07 14:28:37 2023 +0100
+++ b/UHF.sch	Tue Feb 07 14:51:31 2023 +0100
@@ -4,7 +4,7 @@
 EELAYER END
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 encoding utf-8
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-AR Path="/61DB955D/61F9D07A" Ref="R?"  Part="1" 
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-AR Path="/62411C42/61F9D07A" Ref="R26"  Part="1" 
-F 0 "R26" H 7750 1700 50  0000 L CNN
-F 1 "1800R" H 7750 1800 50  0000 L CNN
-F 2 "" V 7630 1750 50  0001 C CNN
-F 3 "~" H 7700 1750 50  0001 C CNN
-	1    7700 1750
-	-1   0    0    1   
-$EndComp
-Wire Wire Line
-	7450 2100 7700 2100
-Wire Wire Line
-	7700 2100 7700 1900
-Wire Wire Line
-	7100 2100 7150 2100
-Wire Wire Line
-	6600 2100 7100 2100
-Connection ~ 7700 2100
-Text GLabel 2200 800  0    50   Input ~ 0
-~CSYNC
-Wire Wire Line
-	2200 800  7700 800 
-Wire Wire Line
-	7700 800  7700 1600
-Wire Wire Line
-	6600 2100 6600 2000
-Wire Wire Line
-	4600 1100 4600 1300
-Wire Wire Line
-	6100 1300 6100 1100
-Connection ~ 6100 1100
-Wire Wire Line
-	6100 1100 6600 1100
-Wire Wire Line
-	4600 1600 4600 1800
-Wire Wire Line
-	4600 1800 4800 1800
-Wire Wire Line
-	6100 1800 6100 1600
-Connection ~ 6100 1800
-Wire Wire Line
-	6100 1800 6300 1800
-$Comp
-L Diode:1N4148 D?
-U 1 1 62248B0E
-P 3550 1500
-AR Path="/61DB955D/62248B0E" Ref="D?"  Part="1" 
-AR Path="/61DB955D/61DF7FF4/62248B0E" Ref="D2"  Part="1" 
-AR Path="/62411C42/62248B0E" Ref="D2"  Part="1" 
-F 0 "D2" H 3550 1300 50  0000 C CNN
-F 1 "1N4148" H 3550 1400 50  0000 C CNN
-F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 3550 1325 50  0001 C CNN
-F 3 "http://www.nxp.com/documents/data_sheet/1N4148_1N4448.pdf" H 3550 1500 50  0001 C CNN
-	1    3550 1500
-	-1   0    0    1   
-$EndComp
-$Comp
-L Diode:1N4148 D?
-U 1 1 62248C2A
-P 3350 1200
-AR Path="/61DB955D/62248C2A" Ref="D?"  Part="1" 
-AR Path="/61DB955D/61DF7FF4/62248C2A" Ref="D3"  Part="1" 
-AR Path="/62411C42/62248C2A" Ref="D3"  Part="1" 
-F 0 "D3" H 3350 1000 50  0000 C CNN
-F 1 "1N4148" H 3350 1100 50  0000 C CNN
-F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 3350 1025 50  0001 C CNN
-F 3 "http://www.nxp.com/documents/data_sheet/1N4148_1N4448.pdf" H 3350 1200 50  0001 C CNN
-	1    3350 1200
-	-1   0    0    1   
-$EndComp
-Wire Wire Line
-	4100 1800 4000 1800
-Wire Wire Line
-	4000 1800 4000 1500
-Wire Wire Line
-	4000 1500 3700 1500
-Connection ~ 4000 1800
-Wire Wire Line
-	4000 1800 3900 1800
-Wire Wire Line
-	4000 1500 4000 1200
-Wire Wire Line
-	4000 1200 3500 1200
-Connection ~ 4000 1500
-Wire Wire Line
-	3600 1800 3500 1800
-Wire Wire Line
-	3500 1800 3500 3300
-Connection ~ 3500 3300
-Wire Wire Line
-	3500 3300 4500 3300
-Wire Wire Line
-	3400 1500 3300 1500
-Wire Wire Line
-	3300 1500 3300 3100
-Connection ~ 3300 3100
-Wire Wire Line
-	3300 3100 4300 3100
-Wire Wire Line
-	3200 1200 3100 1200
-Wire Wire Line
-	3100 1200 3100 2900
-Connection ~ 3100 2900
-Wire Wire Line
-	3100 2900 4100 2900
-Wire Wire Line
-	4400 1800 4600 1800
-Connection ~ 4600 1800
-Wire Wire Line
-	4900 2800 5000 2800
-Wire Wire Line
-	5000 2800 5000 1800
-Connection ~ 5000 1800
-Wire Wire Line
-	5000 1800 6100 1800
-Wire Wire Line
-	4600 2800 4500 2800
-Wire Wire Line
-	4500 2800 4500 3300
-Connection ~ 4500 3300
-Wire Wire Line
-	4500 3300 4900 3300
-Wire Wire Line
-	4700 2500 4900 2500
-Wire Wire Line
-	4900 2500 4900 1800
-Connection ~ 4900 1800
-Wire Wire Line
-	4900 1800 5000 1800
-Wire Wire Line
-	4400 2500 4300 2500
-Wire Wire Line
-	4300 2500 4300 3100
-Connection ~ 4300 3100
-Wire Wire Line
-	4300 3100 5000 3100
-Wire Wire Line
-	4500 2200 4800 2200
-Wire Wire Line
-	4800 2200 4800 1800
-Connection ~ 4800 1800
-Wire Wire Line
-	4800 1800 4900 1800
-Wire Wire Line
-	4200 2200 4100 2200
-Wire Wire Line
-	4100 2200 4100 2900
-Connection ~ 4100 2900
-Wire Wire Line
-	4100 2900 5500 2900
-$Comp
 L Device:C C17
 U 1 1 6241CD4D
 P 10550 3300
@@ -1432,9 +1112,15 @@
 Connection ~ 3850 5550
 Wire Wire Line
 	3850 5550 3850 5850
-Text GLabel 7900 800  2    50   UnSpc ~ 0
-~CSYNC_COMMON
+Text GLabel 2200 2100 0    50   UnSpc ~ 0
+~CSYNC_UHF
+Wire Wire Line
+	2200 3300 4900 3300
 Wire Wire Line
-	7700 800  7900 800 
-Connection ~ 7700 800 
+	2200 3100 5000 3100
+Wire Wire Line
+	2200 2900 5500 2900
+Wire Wire Line
+	8700 2100 2200 2100
+Connection ~ 8700 2100
 $EndSCHEMATC
diff -r 08b8473ab244 -r dd9a3c03f3fd cassette.sch
--- a/cassette.sch	Tue Feb 07 14:28:37 2023 +0100
+++ b/cassette.sch	Tue Feb 07 14:51:31 2023 +0100
@@ -4,7 +4,7 @@
 EELAYER END
 $Descr A4 11693 8268
 encoding utf-8
-Sheet 4 10
+Sheet 4 11
 Title ""
 Date ""
 Rev ""
diff -r 08b8473ab244 -r dd9a3c03f3fd clocks.sch
--- a/clocks.sch	Tue Feb 07 14:28:37 2023 +0100
+++ b/clocks.sch	Tue Feb 07 14:51:31 2023 +0100
@@ -4,7 +4,7 @@
 EELAYER END
 $Descr A4 11693 8268
 encoding utf-8
-Sheet 2 10
+Sheet 2 11
 Title ""
 Date ""
 Rev ""
diff -r 08b8473ab244 -r dd9a3c03f3fd expansion.sch
--- a/expansion.sch	Tue Feb 07 14:28:37 2023 +0100
+++ b/expansion.sch	Tue Feb 07 14:51:31 2023 +0100
@@ -4,7 +4,7 @@
 EELAYER END
 $Descr A4 11693 8268
 encoding utf-8
-Sheet 6 10
+Sheet 6 11
 Title ""
 Date ""
 Rev ""
diff -r 08b8473ab244 -r dd9a3c03f3fd power.sch
--- a/power.sch	Tue Feb 07 14:28:37 2023 +0100
+++ b/power.sch	Tue Feb 07 14:51:31 2023 +0100
@@ -4,7 +4,7 @@
 EELAYER END
 $Descr A4 11693 8268
 encoding utf-8
-Sheet 10 10
+Sheet 10 11
 Title ""
 Date ""
 Rev ""
diff -r 08b8473ab244 -r dd9a3c03f3fd sound.sch
--- a/sound.sch	Tue Feb 07 14:28:37 2023 +0100
+++ b/sound.sch	Tue Feb 07 14:51:31 2023 +0100
@@ -4,7 +4,7 @@
 EELAYER END
 $Descr A4 11693 8268
 encoding utf-8
-Sheet 5 10
+Sheet 5 11
 Title ""
 Date ""
 Rev ""
diff -r 08b8473ab244 -r dd9a3c03f3fd video.sch
--- a/video.sch	Tue Feb 07 14:28:37 2023 +0100
+++ b/video.sch	Tue Feb 07 14:51:31 2023 +0100
@@ -4,7 +4,7 @@
 EELAYER END
 $Descr A4 11693 8268
 encoding utf-8
-Sheet 8 10
+Sheet 8 11
 Title ""
 Date ""
 Rev ""
@@ -112,8 +112,6 @@
 Wire Wire Line
 	6300 2200 6300 2100
 Wire Wire Line
-	1000 1300 3700 1300
-Wire Wire Line
 	6600 1200 6600 1700
 $Comp
 L Connector:Conn_Coaxial SK3
@@ -265,24 +263,22 @@
 0V
 Wire Wire Line
 	5400 3300 5400 3000
-Text GLabel 1000 1300 0    50   Input ~ 0
-~CSYNC
-Text GLabel 1000 1500 0    50   Input ~ 0
+Text GLabel 1100 1500 0    50   Input ~ 0
 BLUE
-Text GLabel 1000 1700 0    50   Input ~ 0
+Text GLabel 1100 1700 0    50   Input ~ 0
 GREEN
-Text GLabel 1000 1900 0    50   Input ~ 0
+Text GLabel 1100 1900 0    50   Input ~ 0
 RED
 Wire Wire Line
 	4000 1500 4000 2600
 Wire Wire Line
 	3900 1700 3900 2800
 Wire Wire Line
-	1000 1500 4000 1500
+	1100 1500 4000 1500
 Wire Wire Line
-	1000 1700 3900 1700
+	1100 1700 3900 1700
 Wire Wire Line
-	1000 1900 3800 1900
+	1100 1900 3800 1900
 Wire Wire Line
 	3700 1300 3700 3200
 $Comp
@@ -307,11 +303,8 @@
 	4200 4000 4300 4000
 Text Notes 3900 4200 0    50   ~ 0
 For optional link from UHF circuit.
-Text GLabel 3500 3200 0    50   UnSpc ~ 0
-~CSYNC_COMMON
-Wire Wire Line
-	3500 3200 3700 3200
-Connection ~ 3700 3200
+Text GLabel 1100 1300 0    50   UnSpc ~ 0
+~CSYNC_VIDEO
 $Comp
 L 74xx:74LS86 IC14
 U 4 1 63EE1FF3
@@ -327,7 +320,6 @@
 	6300 1200 6600 1200
 Wire Wire Line
 	3700 1300 5700 1300
-Connection ~ 3700 1300
 Wire Wire Line
 	5100 950  5100 1100
 Wire Wire Line
@@ -363,4 +355,7 @@
 	0    -1   -1   0   
 $EndComp
 Connection ~ 5100 1100
+Wire Wire Line
+	1100 1300 3700 1300
+Connection ~ 3700 1300
 $EndSCHEMATC