Adjustments for OSI RESET and shiftlock circuits

- adjust RC constants to use simple, common values and reduce number of
different part values.

- Create add-on PCB to provide reset/shiftlock function for older 542 and SB2
keyboards.

hardware/interface-osi/addon.pro

@@ -0,0 +1,43 @@
+update=Thursday, May 14, 2020 at 04:14:31 PM
+version=1
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hardware/interface-osi/addon.sch

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+F 1 "+5V" H 1115 1223 50  0000 C CNN
+F 2 "" H 1100 1050 50  0001 C CNN
+F 3 "" H 1100 1050 50  0001 C CNN
+	1    1100 1050
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
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+Wire Wire Line
+	2500 4050 3600 4050
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+Text Label 1150 2500 0    50   ~ 0
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+Text Label 1150 2700 0    50   ~ 0
+ShiftLock2
+Text Label 1150 2300 0    50   ~ 0
+Break2
+Text Label 1150 2100 0    50   ~ 0
+Break1
+Wire Wire Line
+	950  2900 1550 2900
+Text GLabel 1550 2900 2    50   Input ~ 0
+Row0
+Text GLabel 1550 3000 2    50   Input ~ 0
+Col0
+Text GLabel 1550 3100 2    50   Input ~ 0
+ShifLockLED+
+Text GLabel 1550 3200 2    50   Input ~ 0
+ShiftLockLED-
+Text GLabel 8800 4900 2    50   Input ~ 0
+Row0
+Text GLabel 8800 3650 2    50   Input ~ 0
+Col0
+Text GLabel 8800 5550 2    50   Input ~ 0
+ShifLockLED+
+Text GLabel 8800 5700 2    50   Input ~ 0
+ShiftLockLED-
+Wire Wire Line
+	8800 4900 8750 4900
+Wire Wire Line
+	1550 3000 950  3000
+Wire Wire Line
+	1550 3100 950  3100
+Wire Wire Line
+	1550 3200 950  3200
+Text GLabel 10700 2500 2    50   Input ~ 0
+~RESET
+Text GLabel 1550 3400 2    50   Input ~ 0
+~RESET
+Wire Wire Line
+	1550 3400 950  3400
+Wire Wire Line
+	950  3500 1250 3500
+Connection ~ 1250 3500
+Wire Wire Line
+	1250 3500 1250 3950
+$Comp
+L power:PWR_FLAG #FLG01
+U 1 1 61EB4CE6
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+F 0 "#FLG01" H 1650 6375 50  0001 C CNN
+F 1 "PWR_FLAG" H 1650 6473 50  0000 C CNN
+F 2 "" H 1650 6300 50  0001 C CNN
+F 3 "~" H 1650 6300 50  0001 C CNN
+	1    1650 6300
+	1    0    0    -1  
+$EndComp
+Connection ~ 1650 6300
+Wire Wire Line
+	1650 6300 1800 6300
+Connection ~ 1400 7450
+Wire Wire Line
+	1400 7450 1750 7450
+Wire Wire Line
+	1100 7450 1400 7450
+$Comp
+L power:PWR_FLAG #FLG02
+U 1 1 61EC3E1F
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+F 0 "#FLG02" H 1750 7525 50  0001 C CNN
+F 1 "PWR_FLAG" H 1750 7623 50  0000 C CNN
+F 2 "" H 1750 7450 50  0001 C CNN
+F 3 "~" H 1750 7450 50  0001 C CNN
+	1    1750 7450
+	-1   0    0    1   
+$EndComp
+Connection ~ 1750 7450
+Wire Wire Line
+	1750 7450 1800 7450
+NoConn ~ 950  2200
+NoConn ~ 950  2400
+NoConn ~ 950  2600
+NoConn ~ 950  3300
+Text Label 1150 6300 0    50   ~ 0
++5V
+$Comp
+L Diode:1N914 D3
+U 1 1 61F5D2C9
+P 8750 2250
+F 0 "D3" V 8850 2200 50  0000 C CNN
+F 1 "1N914" V 8650 2100 50  0000 C CNN
+F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 8750 2075 50  0001 C CNN
+F 3 "http://www.vishay.com/docs/85622/1n914.pdf" H 8750 2250 50  0001 C CNN
+	1    8750 2250
+	0    -1   -1   0   
+$EndComp
+$Comp
+L Device:C C5
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+F 0 "C5" H 8865 1796 50  0000 L CNN
+F 1 "0.33uF" H 8865 1705 50  0000 L CNN
+F 2 "Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm" H 8788 1600 50  0001 C CNN
+F 3 "~" H 8750 1750 50  0001 C CNN
+	1    8750 1750
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+$EndComp
+Wire Wire Line
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+Wire Wire Line
+	8750 1600 8750 1450
+Wire Wire Line
+	8750 2500 8750 2400
+Connection ~ 8750 2500
+Wire Wire Line
+	8750 2500 9000 2500
+Wire Wire Line
+	7600 3850 7600 3900
+Wire Wire Line
+	8300 4900 8450 4900
+Wire Wire Line
+	8300 3650 8800 3650
+Wire Wire Line
+	7750 4150 7850 4150
+Wire Wire Line
+	7600 4400 7600 4500
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+	7600 4500 6900 4500
+Connection ~ 6900 4500
+Wire Wire Line
+	6900 4500 6900 4300
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+L 4xxx:4066 U1
+U 3 1 5EA7AD03
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+F 0 "U1" V 7946 5572 50  0000 R CNN
+F 1 "4066" V 7855 5572 50  0000 R CNN
+F 2 "Package_DIP:DIP-14_W7.62mm" H 7900 5700 50  0001 C CNN
+F 3 "http://www.ti.com/lit/ds/symlink/cd4066b.pdf" H 7900 5700 50  0001 C CNN
+	3    7900 5700
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	8200 5700 8800 5700
+Wire Wire Line
+	7400 5700 7400 5950
+$Comp
+L power:GND #PWR013
+U 1 1 5EA9E7F3
+P 7400 5950
+F 0 "#PWR013" H 7400 5700 50  0001 C CNN
+F 1 "GND" H 7405 5777 50  0000 C CNN
+F 2 "" H 7400 5950 50  0001 C CNN
+F 3 "" H 7400 5950 50  0001 C CNN
+	1    7400 5950
+	1    0    0    -1  
+$EndComp
+Connection ~ 7900 4150
+Wire Wire Line
+	7900 4150 8000 4150
+Wire Wire Line
+	7900 4150 7900 5400
+Wire Wire Line
+	3600 4700 4250 4700
+$Comp
+L power:PWR_FLAG #FLG0101
+U 1 1 6213F2E5
+P 7850 4150
+F 0 "#FLG0101" H 7850 4225 50  0001 C CNN
+F 1 "PWR_FLAG" H 7850 4323 50  0000 C CNN
+F 2 "" H 7850 4150 50  0001 C CNN
+F 3 "~" H 7850 4150 50  0001 C CNN
+	1    7850 4150
+	1    0    0    -1  
+$EndComp
+Connection ~ 7850 4150
+Wire Wire Line
+	7850 4150 7900 4150
+$Comp
+L power:+5V #PWR0101
+U 1 1 621441A6
+P 8750 1450
+F 0 "#PWR0101" H 8750 1300 50  0001 C CNN
+F 1 "+5V" H 8765 1623 50  0000 C CNN
+F 2 "" H 8750 1450 50  0001 C CNN
+F 3 "" H 8750 1450 50  0001 C CNN
+	1    8750 1450
+	1    0    0    -1  
+$EndComp
+$Comp
+L 4xxx:4066 U1
+U 2 1 6100162B
+P 5250 4700
+F 0 "U1" V 5296 4572 50  0000 R CNN
+F 1 "4066" V 5205 4572 50  0000 R CNN
+F 2 "Package_DIP:DIP-14_W7.62mm" H 5250 4700 50  0001 C CNN
+F 3 "http://www.ti.com/lit/ds/symlink/cd4066b.pdf" H 5250 4700 50  0001 C CNN
+	2    5250 4700
+	0    -1   -1   0   
+$EndComp
+$Comp
+L Connector_Generic:Conn_01x16 J1
+U 1 1 61D7A2C5
+P 750 2800
+F 0 "J1" H 668 3717 50  0000 C CNN
+F 1 "Conn_01x16" H 668 3626 50  0000 C CNN
+F 2 "Package_DIP:DIP-16_W7.62mm_Socket" H 750 2800 50  0001 C CNN
+F 3 "~" H 750 2800 50  0001 C CNN
+	1    750  2800
+	-1   0    0    -1  
+$EndComp
+$Comp
+L Diode:1N914 D4
+U 1 1 5FC99F09
+P 10050 2500
+F 0 "D4" H 10050 2600 50  0000 C CNN
+F 1 "1N914" H 10250 2450 50  0000 C CNN
+F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 10050 2325 50  0001 C CNN
+F 3 "http://www.vishay.com/docs/85622/1n914.pdf" H 10050 2500 50  0001 C CNN
+	1    10050 2500
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	9900 2500 9600 2500
+$Comp
+L Device:C C6
+U 1 1 5FCCE85D
+P 2500 6900
+F 0 "C6" H 2550 6800 50  0000 L CNN
+F 1 "0.1uF" H 2150 7000 50  0000 L CNN
+F 2 "Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm" H 2538 6750 50  0001 C CNN
+F 3 "~" H 2500 6900 50  0001 C CNN
+	1    2500 6900
+	-1   0    0    1   
+$EndComp
+Wire Wire Line
+	1800 6300 2500 6300
+Wire Wire Line
+	2500 6300 2500 6750
+Connection ~ 1800 6300
+Wire Wire Line
+	2500 7050 2500 7450
+Wire Wire Line
+	2500 7450 1800 7450
+Connection ~ 1800 7450
+$EndSCHEMATC

hardware/interface-osi/interface-osi.sch

@@ -1493,6 +1493,10 @@ Wire Wire Line
 	7150 8550 7150 8300
 Wire Wire Line
 	7150 8300 10400 8300
+Text Notes 5750 8800 0    50   ~ 0
+S1
+Text Notes 5750 8350 0    50   ~ 0
+~S1
 Wire Bus Line
 	12800 1150 12800 1600
 Wire Bus Line
@@ -1501,8 +1505,4 @@ Wire Bus Line
 	13000 5800 13000 7300
 Wire Bus Line
 	11200 1150 11200 5800
-Text Notes 5750 8800 0    50   ~ 0
-S1
-Text Notes 5750 8350 0    50   ~ 0
-~S1
 $EndSCHEMATC

hardware/interface-osi/special_keys.sch

@@ -28,61 +28,6 @@ Break_2
 Text HLabel 9700 2550 2    50   Output ~ 0
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-U 1 1 60F8E3EB
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-F 0 "U10" H 5600 4817 50  0000 C CNN
-F 1 "74LS14" H 5600 4726 50  0000 C CNN
-F 2 "Package_DIP:DIP-14_W7.62mm" H 5600 4500 50  0001 C CNN
-F 3 "http://www.ti.com/lit/gpn/sn74LS14" H 5600 4500 50  0001 C CNN
-	1    5600 4500
-	1    0    0    -1  
-$EndComp
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-U 2 1 60F90788
-P 5600 5350
-F 0 "U10" H 5600 5667 50  0000 C CNN
-F 1 "74LS14" H 5600 5576 50  0000 C CNN
-F 2 "Package_DIP:DIP-14_W7.62mm" H 5600 5350 50  0001 C CNN
-F 3 "http://www.ti.com/lit/gpn/sn74LS14" H 5600 5350 50  0001 C CNN
-	2    5600 5350
-	1    0    0    -1  
-$EndComp
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-U 3 1 60F91229
-P 3650 4900
-F 0 "U10" H 3650 5217 50  0000 C CNN
-F 1 "74LS14" H 3650 5126 50  0000 C CNN
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-F 3 "http://www.ti.com/lit/gpn/sn74LS14" H 3650 4900 50  0001 C CNN
-	3    3650 4900
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-U 4 1 60F9322B
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-F 0 "U10" H 4150 2117 50  0000 C CNN
-F 1 "74LS14" H 4150 2026 50  0000 C CNN
-F 2 "Package_DIP:DIP-14_W7.62mm" H 4150 1800 50  0001 C CNN
-F 3 "http://www.ti.com/lit/gpn/sn74LS14" H 4150 1800 50  0001 C CNN
-	4    4150 1800
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-U 6 1 60F956F9
-P 8500 2550
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-F 1 "74LS14" H 8500 2776 50  0000 C CNN
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-F 3 "http://www.ti.com/lit/gpn/sn74LS14" H 8500 2550 50  0001 C CNN
-	6    8500 2550
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 U 1 1 60F9ED41
 P 5000 5350
@@ -163,7 +108,7 @@ L Device:R_US R14
 U 1 1 60FF7380
 P 3000 1600
 F 0 "R14" H 3068 1646 50  0000 L CNN
-F 1 "5.6M" H 3068 1555 50  0000 L CNN
+F 1 "1M" H 3068 1555 50  0000 L CNN
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 F 3 "~" H 3000 1600 50  0001 C CNN
 	1    3000 1600
@@ -174,7 +119,7 @@ L Device:C C18
 U 1 1 60FF7386
 P 3000 2150
 F 0 "C18" H 3115 2196 50  0000 L CNN
-F 1 "0.33uF" H 3115 2105 50  0000 L CNN
+F 1 "6.8 uF" H 3115 2105 50  0000 L CNN
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 F 3 "~" H 3000 2150 50  0001 C CNN
 	1    3000 2150
@@ -363,7 +308,7 @@ L Device:C C20
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-F 1 "0.33uF" H 6265 2855 50  0000 L CNN
+F 1 "0.1 uF" H 6265 2855 50  0000 L CNN
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 	1    6150 2900
@@ -387,7 +332,7 @@ L Device:R_US R17
 U 1 1 614646B8
 P 5900 2550
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-F 1 "100k" V 5786 2550 50  0000 C CNN
+F 1 "1k" V 5786 2550 50  0000 C CNN
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-F 1 "100K" H 3068 1055 50  0000 L CNN
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 	1    3000 1100
@@ -424,17 +369,6 @@ Wire Wire Line
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-F 3 "http://www.ti.com/lit/gpn/sn74LS14" H 5250 2550 50  0001 C CNN
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 Wire Wire Line
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 U 5 1 61CB40DD
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+F 3 "http://www.ti.com/lit/gpn/sn74HC14" H 5600 5350 50  0001 C CNN
+	2    5600 5350
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+F 3 "http://www.ti.com/lit/gpn/sn74HC14" H 3650 4900 50  0001 C CNN
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+F 3 "http://www.ti.com/lit/gpn/sn74HC14" H 8500 2550 50  0001 C CNN
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