ram.sch

EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A3 16535 11693
encoding utf-8
Sheet 2 3
Title "Hannes256: C16/+4 256 kB RAM Expansion"
Date "2022-09-25"
Rev "1git"
Comp "SukkoPera"
Comment1 "Hannes Version (Update 1 with \"TED Feature\")"
Comment2 "Based on drawings by Solder/Synergy"
Comment3 "Licensed under CC BY-NC-SA 4.0"
Comment4 ""
$EndDescr
Text Label 3400 8290 0    60   ~ 0
MultiplexedAddressBus
Text Label 3770 8770 2    60   ~ 0
DataBus
Text GLabel 3105 8770 0    50   BiDi ~ 0
d[0..7]
$Comp
L 41256:41256 U7
U 1 1 6378B1DD
P 4790 2525
F 0 "U7" H 4790 3240 50  0000 C CNN
F 1 "41256" H 4790 3149 50  0000 C CNN
F 2 "Package_DIP:DIP-16_W7.62mm_Socket" H 4790 2525 50  0001 C CNN
F 3 "DOCUMENTATION" H 4790 2525 50  0001 C CNN
F 4 "See README for supported chips" H 4790 2525 50  0001 C CNN "Notes"
	1    4790 2525
	1    0    0    -1  
$EndComp
$Comp
L 41256:41256 U10
U 1 1 6378F5B9
P 4790 7145
F 0 "U10" H 4790 7860 50  0000 C CNN
F 1 "41256" H 4790 7769 50  0000 C CNN
F 2 "Package_DIP:DIP-16_W7.62mm_Socket" H 4790 7145 50  0001 C CNN
F 3 "DOCUMENTATION" H 4790 7145 50  0001 C CNN
F 4 "See README for supported chips" H 4790 7145 50  0001 C CNN "Notes"
	1    4790 7145
	1    0    0    -1  
$EndComp
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Connection ~ 3840 2875
Wire Wire Line
	4040 7095 3735 7095
Wire Wire Line
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Wire Wire Line
	3735 2475 4040 2475
Wire Wire Line
	4040 2375 3635 2375
Wire Wire Line
	3635 2375 3635 3895
Wire Wire Line
	3635 6995 4040 6995
Wire Wire Line
	4040 5975 3840 5975
Connection ~ 3840 5975
Wire Wire Line
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Wire Wire Line
	4040 4395 3840 4395
Connection ~ 3840 4395
Wire Wire Line
	3840 4395 3840 5975
Wire Wire Line
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Connection ~ 3635 3895
Wire Wire Line
	3635 3895 3635 5475
Wire Wire Line
	4040 3995 3735 3995
Connection ~ 3735 3995
Wire Wire Line
	3735 3995 3735 2475
Wire Wire Line
	4040 5475 3635 5475
Connection ~ 3635 5475
Wire Wire Line
	3635 5475 3635 6995
Wire Wire Line
	4040 5575 3735 5575
Connection ~ 3735 5575
Wire Wire Line
	3735 5575 3735 3995
Wire Wire Line
	5540 2175 5640 2175
Wire Wire Line
	5640 2175 5640 3695
$Comp
L power:GND #PWR?
U 1 1 637A9FA6
P 5640 7880
AR Path="/637A9FA6" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/637A9FA6" Ref="#PWR0110"  Part="1" 
F 0 "#PWR0110" H 5640 7630 50  0001 C CNN
F 1 "GND" H 5645 7707 50  0000 C CNN
F 2 "" H 5640 7880 50  0001 C CNN
F 3 "" H 5640 7880 50  0001 C CNN
	1    5640 7880
	1    0    0    -1  
$EndComp
Wire Wire Line
	5540 6795 5640 6795
Connection ~ 5640 6795
Wire Wire Line
	5640 6795 5640 7880
Wire Wire Line
	5540 5275 5640 5275
Connection ~ 5640 5275
Wire Wire Line
	5640 5275 5640 6795
Wire Wire Line
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Connection ~ 5640 3695
Wire Wire Line
	5640 3695 5640 5275
Wire Wire Line
	5540 2275 5735 2275
Wire Wire Line
	5735 2275 5735 3795
Wire Wire Line
	5735 6895 5540 6895
Wire Wire Line
	5540 5375 5735 5375
Connection ~ 5735 5375
Wire Wire Line
	5735 5375 5735 6895
Wire Wire Line
	5540 3795 5735 3795
Connection ~ 5735 3795
Wire Wire Line
	5735 3795 5735 5375
Wire Wire Line
	3635 2375 2395 2375
Connection ~ 3635 2375
Wire Wire Line
	3735 2475 2635 2475
Connection ~ 3735 2475
Text GLabel 2635 2475 0    50   Input ~ 0
~RAS
Text GLabel 2395 2375 0    50   Input ~ 0
R_~W
Connection ~ 5735 2275
$Comp
L power:+5V #PWR?
U 1 1 6398BCC0
P 3840 2020
AR Path="/6398BCC0" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/6398BCC0" Ref="#PWR0111"  Part="1" 
AR Path="/63A22C28/6398BCC0" Ref="#PWR?"  Part="1" 
F 0 "#PWR0111" H 3840 1870 50  0001 C CNN
F 1 "+5V" H 3855 2193 50  0000 C CNN
F 2 "" H 3840 2020 50  0001 C CNN
F 3 "" H 3840 2020 50  0001 C CNN
	1    3840 2020
	1    0    0    -1  
$EndComp
Wire Wire Line
	4040 2175 3500 2175
Wire Wire Line
	4040 3695 3500 3695
Wire Wire Line
	4040 6795 3500 6795
Entry Wire Line
	3400 2275 3500 2175
Entry Wire Line
	3400 3795 3500 3695
Entry Wire Line
	3400 6895 3500 6795
Wire Bus Line
	3400 8290 3105 8290
Wire Wire Line
	4040 7195 3500 7195
Entry Wire Line
	3400 7295 3500 7195
Wire Wire Line
	4040 7295 3500 7295
Wire Wire Line
	4040 7395 3500 7395
Entry Wire Line
	3400 7495 3500 7395
Entry Wire Line
	3400 7395 3500 7295
Entry Wire Line
	3400 7395 3500 7295
Text Label 3500 7195 0    50   ~ 0
m0
Text Label 3500 7295 0    50   ~ 0
m2
Text Label 3500 7395 0    50   ~ 0
m1
Text Label 3500 6795 0    50   ~ 0
m8
Wire Wire Line
	4040 5275 3500 5275
Entry Wire Line
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Wire Wire Line
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Entry Wire Line
	3400 5775 3500 5675
Wire Wire Line
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Wire Wire Line
	4040 5875 3500 5875
Entry Wire Line
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Entry Wire Line
	3400 5875 3500 5775
Entry Wire Line
	3400 5875 3500 5775
Text Label 3500 5675 0    50   ~ 0
m0
Text Label 3500 5775 0    50   ~ 0
m2
Text Label 3500 5875 0    50   ~ 0
m1
Text Label 3500 5275 0    50   ~ 0
m8
Entry Wire Line
	3400 3795 3500 3695
Wire Wire Line
	4040 4095 3500 4095
Entry Wire Line
	3400 4195 3500 4095
Wire Wire Line
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Wire Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
	3400 4295 3500 4195
Text Label 3500 4095 0    50   ~ 0
m0
Text Label 3500 4195 0    50   ~ 0
m2
Text Label 3500 4295 0    50   ~ 0
m1
Text Label 3500 3695 0    50   ~ 0
m8
Entry Wire Line
	3400 2275 3500 2175
Wire Wire Line
	4040 2575 3500 2575
Entry Wire Line
	3400 2675 3500 2575
Wire Wire Line
	4040 2675 3500 2675
Wire Wire Line
	4040 2775 3500 2775
Entry Wire Line
	3400 2875 3500 2775
Entry Wire Line
	3400 2775 3500 2675
Entry Wire Line
	3400 2775 3500 2675
Text Label 3500 2575 0    50   ~ 0
m0
Text Label 3500 2675 0    50   ~ 0
m2
Text Label 3500 2775 0    50   ~ 0
m1
Text Label 3500 2175 0    50   ~ 0
m8
Wire Wire Line
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Wire Wire Line
	5540 2575 5890 2575
Wire Wire Line
	5540 2675 5890 2675
Wire Wire Line
	5540 2775 5890 2775
Wire Wire Line
	5540 2875 5890 2875
Entry Wire Line
	5890 2475 5990 2575
Entry Wire Line
	5890 2575 5990 2675
Entry Wire Line
	5890 2675 5990 2775
Entry Wire Line
	5890 2775 5990 2875
Entry Wire Line
	5890 2875 5990 2975
Text Label 5890 2475 2    50   ~ 0
m6
Text Label 5890 2575 2    50   ~ 0
m3
Text Label 5890 2675 2    50   ~ 0
m4
Text Label 5890 2775 2    50   ~ 0
m5
Text Label 5890 2875 2    50   ~ 0
m7
Wire Wire Line
	5540 3995 5890 3995
Wire Wire Line
	5540 4095 5890 4095
Wire Wire Line
	5540 4195 5890 4195
Wire Wire Line
	5540 4295 5890 4295
Wire Wire Line
	5540 4395 5890 4395
Entry Wire Line
	5890 3995 5990 4095
Entry Wire Line
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Entry Wire Line
	5890 4195 5990 4295
Entry Wire Line
	5890 4295 5990 4395
Entry Wire Line
	5890 4395 5990 4495
Text Label 5890 3995 2    50   ~ 0
m6
Text Label 5890 4095 2    50   ~ 0
m3
Text Label 5890 4195 2    50   ~ 0
m4
Text Label 5890 4295 2    50   ~ 0
m5
Text Label 5890 4395 2    50   ~ 0
m7
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
	5540 5775 5890 5775
Wire Wire Line
	5540 5875 5890 5875
Wire Wire Line
	5540 5975 5890 5975
Entry Wire Line
	5890 5575 5990 5675
Entry Wire Line
	5890 5675 5990 5775
Entry Wire Line
	5890 5775 5990 5875
Entry Wire Line
	5890 5875 5990 5975
Entry Wire Line
	5890 5975 5990 6075
Text Label 5890 5575 2    50   ~ 0
m6
Text Label 5890 5675 2    50   ~ 0
m3
Text Label 5890 5775 2    50   ~ 0
m4
Text Label 5890 5875 2    50   ~ 0
m5
Text Label 5890 5975 2    50   ~ 0
m7
Wire Wire Line
	5540 7095 5890 7095
Wire Wire Line
	5540 7195 5890 7195
Wire Wire Line
	5540 7295 5890 7295
Wire Wire Line
	5540 7395 5890 7395
Wire Wire Line
	5540 7495 5890 7495
Entry Wire Line
	5890 7095 5990 7195
Entry Wire Line
	5890 7195 5990 7295
Entry Wire Line
	5890 7295 5990 7395
Entry Wire Line
	5890 7395 5990 7495
Entry Wire Line
	5890 7495 5990 7595
Text Label 5890 7095 2    50   ~ 0
m6
Text Label 5890 7195 2    50   ~ 0
m3
Text Label 5890 7295 2    50   ~ 0
m4
Text Label 5890 7395 2    50   ~ 0
m5
Text Label 5890 7495 2    50   ~ 0
m7
Wire Wire Line
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Entry Wire Line
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Text Label 5990 2375 2    50   ~ 0
d0
Wire Bus Line
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Connection ~ 3400 8290
Text GLabel 3105 8290 0    50   Input ~ 0
m[0..8]
Wire Wire Line
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Entry Wire Line
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Text Label 5990 3895 2    50   ~ 0
d1
Wire Wire Line
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Entry Wire Line
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Text Label 5990 5475 2    50   ~ 0
d2
Wire Wire Line
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Entry Wire Line
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Text Label 5990 6995 2    50   ~ 0
d3
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Connection ~ 5830 6995
Wire Wire Line
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Wire Bus Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Connection ~ 5830 2375
Wire Wire Line
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Wire Wire Line
	4040 3795 3940 3795
Wire Wire Line
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Wire Wire Line
	3940 3255 5830 3255
Wire Wire Line
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Connection ~ 5830 3895
Wire Wire Line
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Wire Wire Line
	4040 5375 3940 5375
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Connection ~ 5830 5475
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Text GLabel 2620 1640 0    50   Input ~ 0
~CAS_64K
$Comp
L 41256:41256 U11
U 1 1 63AD6320
P 9515 2525
F 0 "U11" H 9515 3240 50  0000 C CNN
F 1 "41256" H 9515 3149 50  0000 C CNN
F 2 "Package_DIP:DIP-16_W7.62mm_Socket" H 9515 2525 50  0001 C CNN
F 3 "DOCUMENTATION" H 9515 2525 50  0001 C CNN
F 4 "See README for supported chips" H 9515 2525 50  0001 C CNN "Notes"
	1    9515 2525
	1    0    0    -1  
$EndComp
$Comp
L 41256:41256 U12
U 1 1 63AD632A
P 9515 4045
F 0 "U12" H 9515 4760 50  0000 C CNN
F 1 "41256" H 9515 4669 50  0000 C CNN
F 2 "Package_DIP:DIP-16_W7.62mm_Socket" H 9515 4045 50  0001 C CNN
F 3 "DOCUMENTATION" H 9515 4045 50  0001 C CNN
F 4 "See README for supported chips" H 9515 4045 50  0001 C CNN "Notes"
	1    9515 4045
	1    0    0    -1  
$EndComp
$Comp
L 41256:41256 U13
U 1 1 63AD6334
P 9515 5625
F 0 "U13" H 9515 6340 50  0000 C CNN
F 1 "41256" H 9515 6249 50  0000 C CNN
F 2 "Package_DIP:DIP-16_W7.62mm_Socket" H 9515 5625 50  0001 C CNN
F 3 "DOCUMENTATION" H 9515 5625 50  0001 C CNN
F 4 "See README for supported chips" H 9515 5625 50  0001 C CNN "Notes"
	1    9515 5625
	1    0    0    -1  
$EndComp
$Comp
L 41256:41256 U14
U 1 1 63AD633E
P 9515 7145
F 0 "U14" H 9515 7860 50  0000 C CNN
F 1 "41256" H 9515 7769 50  0000 C CNN
F 2 "Package_DIP:DIP-16_W7.62mm_Socket" H 9515 7145 50  0001 C CNN
F 3 "DOCUMENTATION" H 9515 7145 50  0001 C CNN
F 4 "See README for supported chips" H 9515 7145 50  0001 C CNN "Notes"
	1    9515 7145
	1    0    0    -1  
$EndComp
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Connection ~ 8565 2875
Wire Wire Line
	8765 7095 8460 7095
Wire Wire Line
	8460 7095 8460 5575
Wire Wire Line
	8460 2475 8765 2475
Wire Wire Line
	8765 2375 8360 2375
Wire Wire Line
	8360 2375 8360 3895
Wire Wire Line
	8360 6995 8765 6995
Wire Wire Line
	8765 5975 8565 5975
Connection ~ 8565 5975
Wire Wire Line
	8565 5975 8565 7495
Wire Wire Line
	8765 4395 8565 4395
Connection ~ 8565 4395
Wire Wire Line
	8565 4395 8565 5975
Wire Wire Line
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Connection ~ 8360 3895
Wire Wire Line
	8360 3895 8360 5475
Wire Wire Line
	8765 3995 8460 3995
Connection ~ 8460 3995
Wire Wire Line
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Wire Wire Line
	8765 5475 8360 5475
Connection ~ 8360 5475
Wire Wire Line
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Wire Wire Line
	8765 5575 8460 5575
Connection ~ 8460 5575
Wire Wire Line
	8460 5575 8460 3995
Wire Wire Line
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Wire Wire Line
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$Comp
L power:GND #PWR?
U 1 1 63AD6367
P 10365 7880
AR Path="/63AD6367" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63AD6367" Ref="#PWR02"  Part="1" 
F 0 "#PWR02" H 10365 7630 50  0001 C CNN
F 1 "GND" H 10370 7707 50  0000 C CNN
F 2 "" H 10365 7880 50  0001 C CNN
F 3 "" H 10365 7880 50  0001 C CNN
	1    10365 7880
	1    0    0    -1  
$EndComp
Wire Wire Line
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Connection ~ 10365 6795
Wire Wire Line
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Wire Wire Line
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Connection ~ 10365 5275
Wire Wire Line
	10365 5275 10365 6795
Wire Wire Line
	10265 3695 10365 3695
Connection ~ 10365 3695
Wire Wire Line
	10365 3695 10365 5275
Wire Wire Line
	10265 2275 10460 2275
Wire Wire Line
	10460 2275 10460 3795
Wire Wire Line
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Wire Wire Line
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Connection ~ 10460 5375
Wire Wire Line
	10460 5375 10460 6895
Wire Wire Line
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Connection ~ 10460 3795
Wire Wire Line
	10460 3795 10460 5375
Wire Wire Line
	8360 2375 7120 2375
Connection ~ 8360 2375
Wire Wire Line
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Connection ~ 8460 2475
Text GLabel 7360 2475 0    50   Input ~ 0
~RAS
Text GLabel 7120 2375 0    50   Input ~ 0
R_~W
Connection ~ 10460 2275
$Comp
L power:+5V #PWR?
U 1 1 63AD638A
P 8565 2020
AR Path="/63AD638A" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63AD638A" Ref="#PWR01"  Part="1" 
AR Path="/63A22C28/63AD638A" Ref="#PWR?"  Part="1" 
F 0 "#PWR01" H 8565 1870 50  0001 C CNN
F 1 "+5V" H 8580 2193 50  0000 C CNN
F 2 "" H 8565 2020 50  0001 C CNN
F 3 "" H 8565 2020 50  0001 C CNN
	1    8565 2020
	1    0    0    -1  
$EndComp
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Wire Wire Line
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Entry Wire Line
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Wire Wire Line
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Wire Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Text Label 8225 7195 0    50   ~ 0
m0
Text Label 8225 7295 0    50   ~ 0
m2
Text Label 8225 7395 0    50   ~ 0
m1
Text Label 8225 6795 0    50   ~ 0
m8
Wire Wire Line
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Entry Wire Line
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Wire Wire Line
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Entry Wire Line
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Wire Wire Line
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Wire Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Text Label 8225 5675 0    50   ~ 0
m0
Text Label 8225 5775 0    50   ~ 0
m2
Text Label 8225 5875 0    50   ~ 0
m1
Text Label 8225 5275 0    50   ~ 0
m8
Entry Wire Line
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Wire Wire Line
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Entry Wire Line
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Wire Wire Line
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Wire Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
	8125 4295 8225 4195
Text Label 8225 4095 0    50   ~ 0
m0
Text Label 8225 4195 0    50   ~ 0
m2
Text Label 8225 4295 0    50   ~ 0
m1
Text Label 8225 3695 0    50   ~ 0
m8
Entry Wire Line
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Wire Wire Line
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Entry Wire Line
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Wire Wire Line
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Wire Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Text Label 8225 2575 0    50   ~ 0
m0
Text Label 8225 2675 0    50   ~ 0
m2
Text Label 8225 2775 0    50   ~ 0
m1
Text Label 8225 2175 0    50   ~ 0
m8
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Text Label 10615 2475 2    50   ~ 0
m6
Text Label 10615 2575 2    50   ~ 0
m3
Text Label 10615 2675 2    50   ~ 0
m4
Text Label 10615 2775 2    50   ~ 0
m5
Text Label 10615 2875 2    50   ~ 0
m7
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Text Label 10615 3995 2    50   ~ 0
m6
Text Label 10615 4095 2    50   ~ 0
m3
Text Label 10615 4195 2    50   ~ 0
m4
Text Label 10615 4295 2    50   ~ 0
m5
Text Label 10615 4395 2    50   ~ 0
m7
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Text Label 10615 5575 2    50   ~ 0
m6
Text Label 10615 5675 2    50   ~ 0
m3
Text Label 10615 5775 2    50   ~ 0
m4
Text Label 10615 5875 2    50   ~ 0
m5
Text Label 10615 5975 2    50   ~ 0
m7
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Text Label 10615 7095 2    50   ~ 0
m6
Text Label 10615 7195 2    50   ~ 0
m3
Text Label 10615 7295 2    50   ~ 0
m4
Text Label 10615 7395 2    50   ~ 0
m5
Text Label 10615 7495 2    50   ~ 0
m7
Wire Wire Line
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Entry Wire Line
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Text Label 10715 2375 2    50   ~ 0
d4
Wire Bus Line
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Connection ~ 8125 8290
Wire Wire Line
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Entry Wire Line
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Text Label 10715 3895 2    50   ~ 0
d5
Wire Wire Line
	10265 5475 10555 5475
Entry Wire Line
	10715 5475 10815 5575
Text Label 10715 5475 2    50   ~ 0
d6
Wire Wire Line
	10265 6995 10555 6995
Entry Wire Line
	10715 6995 10815 7095
Text Label 10715 6995 2    50   ~ 0
d7
Wire Wire Line
	8765 6895 8665 6895
Wire Wire Line
	8665 6895 8665 6355
Wire Wire Line
	8665 6355 10555 6355
Wire Wire Line
	10555 6355 10555 6995
Connection ~ 10555 6995
Wire Wire Line
	10555 6995 10715 6995
Wire Wire Line
	8765 2275 8665 2275
Wire Wire Line
	8665 2275 8665 1735
Wire Wire Line
	8665 1735 10555 1735
Wire Wire Line
	10555 1735 10555 2375
Connection ~ 10555 2375
Wire Wire Line
	10555 2375 10715 2375
Wire Wire Line
	8765 3795 8665 3795
Wire Wire Line
	8665 3795 8665 3255
Wire Wire Line
	8665 3255 10555 3255
Wire Wire Line
	10555 3255 10555 3895
Connection ~ 10555 3895
Wire Wire Line
	10555 3895 10715 3895
Wire Wire Line
	8765 5375 8665 5375
Wire Wire Line
	8665 5375 8665 4835
Wire Wire Line
	8665 4835 10555 4835
Wire Wire Line
	10555 4835 10555 5475
Connection ~ 10555 5475
Wire Wire Line
	10555 5475 10715 5475
Wire Wire Line
	10460 2275 10460 1640
Wire Wire Line
	10460 1640 7345 1640
Text GLabel 7345 1640 0    50   Input ~ 0
~CAS_64K
Wire Bus Line
	5990 8290 8125 8290
Connection ~ 5990 8290
Wire Bus Line
	6090 8770 10815 8770
Connection ~ 6090 8770
$Comp
L 41256:41256 U8
U 1 1 6378E054
P 4790 4045
F 0 "U8" H 4790 4760 50  0000 C CNN
F 1 "41256" H 4790 4669 50  0000 C CNN
F 2 "Package_DIP:DIP-16_W7.62mm_Socket" H 4790 4045 50  0001 C CNN
F 3 "DOCUMENTATION" H 4790 4045 50  0001 C CNN
F 4 "See README for supported chips" H 4790 4045 50  0001 C CNN "Notes"
	1    4790 4045
	1    0    0    -1  
$EndComp
$Comp
L 41256:41256 U9
U 1 1 6378F3E3
P 4790 5625
F 0 "U9" H 4790 6340 50  0000 C CNN
F 1 "41256" H 4790 6249 50  0000 C CNN
F 2 "Package_DIP:DIP-16_W7.62mm_Socket" H 4790 5625 50  0001 C CNN
F 3 "DOCUMENTATION" H 4790 5625 50  0001 C CNN
F 4 "See README for supported chips" H 4790 5625 50  0001 C CNN "Notes"
	1    4790 5625
	1    0    0    -1  
$EndComp
Text Notes 6010 9740 0    50   ~ 0
WE NEED TO USE 41256 RAM CHIPS AS THEIR INTERNAL MATRIX IS\nORGANIZED IN 256 ROWS BY 1024 COLUMNS AND THUS ONLY NEED\nROWS A0-A7 FOR RAS-ONLY REFRESH (WHICH IS WHAT TED PRODUCES).\n\n44256 ARE GENERALLY ORGANIZED IN 512 ROWS AND WOULD NEED\nA MUCH MORE COMPLEX REFRESH LOGIC, IN ORDER TO REFRESH THE\nPAGES THAT ARE CURRENTLY NOT SELECTED.
$Comp
L Device:C C?
U 1 1 63BD05FA
P 6400 2570
AR Path="/63BD05FA" Ref="C?"  Part="1" 
AR Path="/62E48B71/63BD05FA" Ref="C7"  Part="1" 
AR Path="/63A22C28/63BD05FA" Ref="C?"  Part="1" 
F 0 "C7" H 6515 2616 50  0000 L CNN
F 1 "100n" H 6515 2525 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 6438 2420 50  0001 C CNN
F 3 "~" H 6400 2570 50  0001 C CNN
F 4 "C49678" H 6400 2570 50  0001 C CNN "LCSC"
	1    6400 2570
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 63BD0600
P 6400 2820
AR Path="/63BD0600" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63BD0600" Ref="#PWR06"  Part="1" 
AR Path="/63A22C28/63BD0600" Ref="#PWR?"  Part="1" 
F 0 "#PWR06" H 6400 2570 50  0001 C CNN
F 1 "GND" H 6400 2670 50  0000 C CNN
F 2 "" H 6400 2820 50  0001 C CNN
F 3 "" H 6400 2820 50  0001 C CNN
	1    6400 2820
	1    0    0    -1  
$EndComp
Wire Wire Line
	6400 2420 6400 2320
Wire Wire Line
	6400 2720 6400 2820
$Comp
L power:+5V #PWR?
U 1 1 63BD0608
P 6400 2320
AR Path="/63BD0608" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63BD0608" Ref="#PWR03"  Part="1" 
AR Path="/63A22C28/63BD0608" Ref="#PWR?"  Part="1" 
F 0 "#PWR03" H 6400 2170 50  0001 C CNN
F 1 "+5V" H 6415 2493 50  0000 C CNN
F 2 "" H 6400 2320 50  0001 C CNN
F 3 "" H 6400 2320 50  0001 C CNN
	1    6400 2320
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 63BDC3DA
P 6400 4090
AR Path="/63BDC3DA" Ref="C?"  Part="1" 
AR Path="/62E48B71/63BDC3DA" Ref="C8"  Part="1" 
AR Path="/63A22C28/63BDC3DA" Ref="C?"  Part="1" 
F 0 "C8" H 6515 4136 50  0000 L CNN
F 1 "100n" H 6515 4045 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 6438 3940 50  0001 C CNN
F 3 "~" H 6400 4090 50  0001 C CNN
F 4 "C49678" H 6400 4090 50  0001 C CNN "LCSC"
	1    6400 4090
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 63BDC5B8
P 6400 4340
AR Path="/63BDC5B8" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63BDC5B8" Ref="#PWR08"  Part="1" 
AR Path="/63A22C28/63BDC5B8" Ref="#PWR?"  Part="1" 
F 0 "#PWR08" H 6400 4090 50  0001 C CNN
F 1 "GND" H 6400 4190 50  0000 C CNN
F 2 "" H 6400 4340 50  0001 C CNN
F 3 "" H 6400 4340 50  0001 C CNN
	1    6400 4340
	1    0    0    -1  
$EndComp
Wire Wire Line
	6400 3940 6400 3840
Wire Wire Line
	6400 4240 6400 4340
$Comp
L power:+5V #PWR?
U 1 1 63BDC5C4
P 6400 3840
AR Path="/63BDC5C4" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63BDC5C4" Ref="#PWR07"  Part="1" 
AR Path="/63A22C28/63BDC5C4" Ref="#PWR?"  Part="1" 
F 0 "#PWR07" H 6400 3690 50  0001 C CNN
F 1 "+5V" H 6415 4013 50  0000 C CNN
F 2 "" H 6400 3840 50  0001 C CNN
F 3 "" H 6400 3840 50  0001 C CNN
	1    6400 3840
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 63BEA0EF
P 6400 5670
AR Path="/63BEA0EF" Ref="C?"  Part="1" 
AR Path="/62E48B71/63BEA0EF" Ref="C9"  Part="1" 
AR Path="/63A22C28/63BEA0EF" Ref="C?"  Part="1" 
F 0 "C9" H 6515 5716 50  0000 L CNN
F 1 "100n" H 6515 5625 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 6438 5520 50  0001 C CNN
F 3 "~" H 6400 5670 50  0001 C CNN
F 4 "C49678" H 6400 5670 50  0001 C CNN "LCSC"
	1    6400 5670
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 63BEA2FB
P 6400 5920
AR Path="/63BEA2FB" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63BEA2FB" Ref="#PWR010"  Part="1" 
AR Path="/63A22C28/63BEA2FB" Ref="#PWR?"  Part="1" 
F 0 "#PWR010" H 6400 5670 50  0001 C CNN
F 1 "GND" H 6400 5770 50  0000 C CNN
F 2 "" H 6400 5920 50  0001 C CNN
F 3 "" H 6400 5920 50  0001 C CNN
	1    6400 5920
	1    0    0    -1  
$EndComp
Wire Wire Line
	6400 5520 6400 5420
Wire Wire Line
	6400 5820 6400 5920
$Comp
L power:+5V #PWR?
U 1 1 63BEA307
P 6400 5420
AR Path="/63BEA307" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63BEA307" Ref="#PWR09"  Part="1" 
AR Path="/63A22C28/63BEA307" Ref="#PWR?"  Part="1" 
F 0 "#PWR09" H 6400 5270 50  0001 C CNN
F 1 "+5V" H 6415 5593 50  0000 C CNN
F 2 "" H 6400 5420 50  0001 C CNN
F 3 "" H 6400 5420 50  0001 C CNN
	1    6400 5420
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 63BF7A01
P 6400 7200
AR Path="/63BF7A01" Ref="C?"  Part="1" 
AR Path="/62E48B71/63BF7A01" Ref="C10"  Part="1" 
AR Path="/63A22C28/63BF7A01" Ref="C?"  Part="1" 
F 0 "C10" H 6515 7246 50  0000 L CNN
F 1 "100n" H 6515 7155 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 6438 7050 50  0001 C CNN
F 3 "~" H 6400 7200 50  0001 C CNN
F 4 "C49678" H 6400 7200 50  0001 C CNN "LCSC"
	1    6400 7200
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 63BF7C3B
P 6400 7450
AR Path="/63BF7C3B" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63BF7C3B" Ref="#PWR013"  Part="1" 
AR Path="/63A22C28/63BF7C3B" Ref="#PWR?"  Part="1" 
F 0 "#PWR013" H 6400 7200 50  0001 C CNN
F 1 "GND" H 6400 7300 50  0000 C CNN
F 2 "" H 6400 7450 50  0001 C CNN
F 3 "" H 6400 7450 50  0001 C CNN
	1    6400 7450
	1    0    0    -1  
$EndComp
Wire Wire Line
	6400 7050 6400 6950
Wire Wire Line
	6400 7350 6400 7450
$Comp
L power:+5V #PWR?
U 1 1 63BF7C47
P 6400 6950
AR Path="/63BF7C47" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63BF7C47" Ref="#PWR011"  Part="1" 
AR Path="/63A22C28/63BF7C47" Ref="#PWR?"  Part="1" 
F 0 "#PWR011" H 6400 6800 50  0001 C CNN
F 1 "+5V" H 6415 7123 50  0000 C CNN
F 2 "" H 6400 6950 50  0001 C CNN
F 3 "" H 6400 6950 50  0001 C CNN
	1    6400 6950
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 63C04FDA
P 11010 2570
AR Path="/63C04FDA" Ref="C?"  Part="1" 
AR Path="/62E48B71/63C04FDA" Ref="C11"  Part="1" 
AR Path="/63A22C28/63C04FDA" Ref="C?"  Part="1" 
F 0 "C11" H 11125 2616 50  0000 L CNN
F 1 "100n" H 11125 2525 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 11048 2420 50  0001 C CNN
F 3 "~" H 11010 2570 50  0001 C CNN
F 4 "C49678" H 11010 2570 50  0001 C CNN "LCSC"
	1    11010 2570
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 63C05242
P 11010 2820
AR Path="/63C05242" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63C05242" Ref="#PWR017"  Part="1" 
AR Path="/63A22C28/63C05242" Ref="#PWR?"  Part="1" 
F 0 "#PWR017" H 11010 2570 50  0001 C CNN
F 1 "GND" H 11010 2670 50  0000 C CNN
F 2 "" H 11010 2820 50  0001 C CNN
F 3 "" H 11010 2820 50  0001 C CNN
	1    11010 2820
	1    0    0    -1  
$EndComp
Wire Wire Line
	11010 2420 11010 2320
Wire Wire Line
	11010 2720 11010 2820
$Comp
L power:+5V #PWR?
U 1 1 63C0524E
P 11010 2320
AR Path="/63C0524E" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63C0524E" Ref="#PWR016"  Part="1" 
AR Path="/63A22C28/63C0524E" Ref="#PWR?"  Part="1" 
F 0 "#PWR016" H 11010 2170 50  0001 C CNN
F 1 "+5V" H 11025 2493 50  0000 C CNN
F 2 "" H 11010 2320 50  0001 C CNN
F 3 "" H 11010 2320 50  0001 C CNN
	1    11010 2320
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 63C05258
P 11010 4090
AR Path="/63C05258" Ref="C?"  Part="1" 
AR Path="/62E48B71/63C05258" Ref="C12"  Part="1" 
AR Path="/63A22C28/63C05258" Ref="C?"  Part="1" 
F 0 "C12" H 11125 4136 50  0000 L CNN
F 1 "100n" H 11125 4045 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 11048 3940 50  0001 C CNN
F 3 "~" H 11010 4090 50  0001 C CNN
F 4 "C49678" H 11010 4090 50  0001 C CNN "LCSC"
	1    11010 4090
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 63C05262
P 11010 4340
AR Path="/63C05262" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63C05262" Ref="#PWR021"  Part="1" 
AR Path="/63A22C28/63C05262" Ref="#PWR?"  Part="1" 
F 0 "#PWR021" H 11010 4090 50  0001 C CNN
F 1 "GND" H 11010 4190 50  0000 C CNN
F 2 "" H 11010 4340 50  0001 C CNN
F 3 "" H 11010 4340 50  0001 C CNN
	1    11010 4340
	1    0    0    -1  
$EndComp
Wire Wire Line
	11010 3940 11010 3840
Wire Wire Line
	11010 4240 11010 4340
$Comp
L power:+5V #PWR?
U 1 1 63C0526E
P 11010 3840
AR Path="/63C0526E" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63C0526E" Ref="#PWR018"  Part="1" 
AR Path="/63A22C28/63C0526E" Ref="#PWR?"  Part="1" 
F 0 "#PWR018" H 11010 3690 50  0001 C CNN
F 1 "+5V" H 11025 4013 50  0000 C CNN
F 2 "" H 11010 3840 50  0001 C CNN
F 3 "" H 11010 3840 50  0001 C CNN
	1    11010 3840
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 63C05278
P 11010 5670
AR Path="/63C05278" Ref="C?"  Part="1" 
AR Path="/62E48B71/63C05278" Ref="C13"  Part="1" 
AR Path="/63A22C28/63C05278" Ref="C?"  Part="1" 
F 0 "C13" H 11125 5716 50  0000 L CNN
F 1 "100n" H 11125 5625 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 11048 5520 50  0001 C CNN
F 3 "~" H 11010 5670 50  0001 C CNN
F 4 "C49678" H 11010 5670 50  0001 C CNN "LCSC"
	1    11010 5670
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 63C05282
P 11010 5920
AR Path="/63C05282" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63C05282" Ref="#PWR023"  Part="1" 
AR Path="/63A22C28/63C05282" Ref="#PWR?"  Part="1" 
F 0 "#PWR023" H 11010 5670 50  0001 C CNN
F 1 "GND" H 11010 5770 50  0000 C CNN
F 2 "" H 11010 5920 50  0001 C CNN
F 3 "" H 11010 5920 50  0001 C CNN
	1    11010 5920
	1    0    0    -1  
$EndComp
Wire Wire Line
	11010 5520 11010 5420
Wire Wire Line
	11010 5820 11010 5920
$Comp
L power:+5V #PWR?
U 1 1 63C0528E
P 11010 5420
AR Path="/63C0528E" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63C0528E" Ref="#PWR022"  Part="1" 
AR Path="/63A22C28/63C0528E" Ref="#PWR?"  Part="1" 
F 0 "#PWR022" H 11010 5270 50  0001 C CNN
F 1 "+5V" H 11025 5593 50  0000 C CNN
F 2 "" H 11010 5420 50  0001 C CNN
F 3 "" H 11010 5420 50  0001 C CNN
	1    11010 5420
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 63C05298
P 11010 7200
AR Path="/63C05298" Ref="C?"  Part="1" 
AR Path="/62E48B71/63C05298" Ref="C14"  Part="1" 
AR Path="/63A22C28/63C05298" Ref="C?"  Part="1" 
F 0 "C14" H 11125 7246 50  0000 L CNN
F 1 "100n" H 11125 7155 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 11048 7050 50  0001 C CNN
F 3 "~" H 11010 7200 50  0001 C CNN
F 4 "C49678" H 11010 7200 50  0001 C CNN "LCSC"
	1    11010 7200
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 63C052A2
P 11010 7450
AR Path="/63C052A2" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63C052A2" Ref="#PWR027"  Part="1" 
AR Path="/63A22C28/63C052A2" Ref="#PWR?"  Part="1" 
F 0 "#PWR027" H 11010 7200 50  0001 C CNN
F 1 "GND" H 11010 7300 50  0000 C CNN
F 2 "" H 11010 7450 50  0001 C CNN
F 3 "" H 11010 7450 50  0001 C CNN
	1    11010 7450
	1    0    0    -1  
$EndComp
Wire Wire Line
	11010 7050 11010 6950
Wire Wire Line
	11010 7350 11010 7450
$Comp
L power:+5V #PWR?
U 1 1 63C052AE
P 11010 6950
AR Path="/63C052AE" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63C052AE" Ref="#PWR024"  Part="1" 
AR Path="/63A22C28/63C052AE" Ref="#PWR?"  Part="1" 
F 0 "#PWR024" H 11010 6800 50  0001 C CNN
F 1 "+5V" H 11025 7123 50  0000 C CNN
F 2 "" H 11010 6950 50  0001 C CNN
F 3 "" H 11010 6950 50  0001 C CNN
	1    11010 6950
	1    0    0    -1  
$EndComp
Wire Bus Line
	6090 2475 6090 8770
Wire Bus Line
	10815 2475 10815 8770
Wire Bus Line
	5990 2575 5990 8290
Wire Bus Line
	3400 2275 3400 8290
Wire Bus Line
	10715 2575 10715 8290
Wire Bus Line
	8125 2275 8125 8290
$EndSCHEMATC