ram.sch

EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 4 14
Title "LittleSixteen"
Date "2024-11-13"
Rev "4git"
Comp "SukkoPera"
Comment1 "Licensed under CC BY-NC-SA 4.0"
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L Device:C C?
U 1 1 64EB88F1
P 7335 4775
AR Path="/64EB88F1" Ref="C?"  Part="1" 
AR Path="/62E48B71/64EB88F1" Ref="C?"  Part="1" 
AR Path="/63A22C28/64EB88F1" Ref="C?"  Part="1" 
AR Path="/5E4A465A/64E9FF4C/64EB88F1" Ref="C?"  Part="1" 
AR Path="/5E4A465A/64EB88F1" Ref="C92"  Part="1" 
F 0 "C92" H 7450 4821 50  0000 L CNN
F 1 "100n" H 7450 4730 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D8.0mm_W2.5mm_P5.00mm" H 7373 4625 50  0001 C CNN
F 3 "~" H 7335 4775 50  0001 C CNN
F 4 "810-FG28X7R1H104KNT0" H 7335 4775 50  0001 C CNN "MouserPN"
	1    7335 4775
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 64EB88F7
P 7335 5025
AR Path="/64EB88F7" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/64EB88F7" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/64EB88F7" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/64E9FF4C/64EB88F7" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/64EB88F7" Ref="#PWR0107"  Part="1" 
F 0 "#PWR0107" H 7335 4775 50  0001 C CNN
F 1 "GND" H 7335 4875 50  0000 C CNN
F 2 "" H 7335 5025 50  0001 C CNN
F 3 "" H 7335 5025 50  0001 C CNN
	1    7335 5025
	1    0    0    -1  
$EndComp
Wire Wire Line
	7335 4625 7335 4525
Wire Wire Line
	7335 4925 7335 5025
Wire Wire Line
	8635 4080 8190 4080
Wire Wire Line
	8635 4180 8190 4180
Wire Wire Line
	8635 4280 8190 4280
Wire Wire Line
	8635 4380 8190 4380
Wire Wire Line
	8635 4480 8190 4480
Wire Wire Line
	8635 4580 8190 4580
Wire Wire Line
	8635 4680 8190 4680
Wire Wire Line
	8635 4780 8190 4780
Wire Wire Line
	8635 4880 8190 4880
Wire Wire Line
	8635 4980 8190 4980
Wire Wire Line
	8635 5080 8190 5080
Wire Wire Line
	8635 5180 8190 5180
Wire Wire Line
	8635 5280 8190 5280
Wire Wire Line
	8635 5380 8190 5380
Wire Wire Line
	8635 5480 8190 5480
Wire Wire Line
	8635 5580 8455 5580
Wire Wire Line
	8455 5580 8455 5925
$Comp
L power:GND #PWR?
U 1 1 64EB891C
P 8455 5925
AR Path="/64EB891C" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/64EB891C" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/64EB891C" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/64E9FF4C/64EB891C" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/64EB891C" Ref="#PWR0118"  Part="1" 
F 0 "#PWR0118" H 8455 5675 50  0001 C CNN
F 1 "GND" H 8455 5775 50  0000 C CNN
F 2 "" H 8455 5925 50  0001 C CNN
F 3 "" H 8455 5925 50  0001 C CNN
	1    8455 5925
	1    0    0    -1  
$EndComp
Wire Wire Line
	10580 4180 10135 4180
Wire Wire Line
	10580 4280 10135 4280
Wire Wire Line
	10580 4480 10135 4480
Wire Wire Line
	10580 4580 10135 4580
Wire Wire Line
	10580 4680 10135 4680
Wire Wire Line
	10580 4780 10135 4780
Wire Wire Line
	10580 4980 10135 4980
Wire Wire Line
	10580 5180 10135 5180
Wire Wire Line
	10580 5280 10135 5280
Wire Wire Line
	10580 5380 10135 5380
Wire Wire Line
	10580 5480 10135 5480
Wire Wire Line
	10580 5580 10135 5580
Entry Wire Line
	8090 4180 8190 4280
Entry Wire Line
	8090 4280 8190 4380
Entry Wire Line
	8090 4380 8190 4480
Entry Wire Line
	8090 4480 8190 4580
Entry Wire Line
	8090 4580 8190 4680
Entry Wire Line
	8090 4680 8190 4780
Entry Wire Line
	8090 4780 8190 4880
Entry Wire Line
	8090 4880 8190 4980
Entry Wire Line
	8090 4980 8190 5080
Entry Wire Line
	8090 5080 8190 5180
Entry Wire Line
	8090 5180 8190 5280
Entry Wire Line
	8090 5280 8190 5380
Entry Wire Line
	8090 5380 8190 5480
Entry Wire Line
	10680 5480 10580 5580
Entry Wire Line
	10680 5380 10580 5480
Entry Wire Line
	10680 5280 10580 5380
Entry Wire Line
	10680 5180 10580 5280
Entry Wire Line
	10680 5080 10580 5180
Entry Wire Line
	10680 4880 10580 4980
Entry Wire Line
	10680 4680 10580 4780
Entry Wire Line
	10680 4580 10580 4680
Entry Wire Line
	10680 4480 10580 4580
Wire Wire Line
	10135 4080 10315 4080
Text Label 10580 4180 2    50   ~ 0
a16
Text Label 10580 4280 2    50   ~ 0
a17
Text Label 10580 4480 2    50   ~ 0
a18
Text Label 8190 4180 0    50   ~ 0
a8
Text Label 8190 4280 0    50   ~ 0
a7
Text Label 8190 4380 0    50   ~ 0
a6
Text Label 8190 5080 0    50   ~ 0
a14
Text Label 8190 5180 0    50   ~ 0
a15
Text GLabel 10225 4380 2    50   Input ~ 0
R_~W
Wire Wire Line
	10135 4380 10225 4380
Wire Bus Line
	10680 6210 8090 6210
Wire Bus Line
	8090 6210 7125 6210
Text GLabel 7125 6210 0    50   BiDi ~ 0
d[0..7]
Text Label 8190 5280 0    50   ~ 0
d1
Text Label 8190 5380 0    50   ~ 0
d3
Text Label 8190 5480 0    50   ~ 0
d5
Text Label 10580 5380 2    50   ~ 0
d4
Text Label 10580 5480 2    50   ~ 0
d6
Text Label 10580 5580 2    50   ~ 0
d7
Text Label 8090 6210 2    60   ~ 0
DataBus
Connection ~ 8090 6210
Wire Wire Line
	10625 5080 10625 4980
Wire Wire Line
	10625 4980 11065 4980
Text Label 10580 4580 2    50   ~ 0
a12
Text Label 10580 4780 2    50   ~ 0
a13
Text Label 10580 5280 2    50   ~ 0
d2
Text Label 10580 5180 2    50   ~ 0
d0
Wire Wire Line
	10135 5080 10315 5080
Wire Wire Line
	10135 4880 10315 4880
Wire Wire Line
	10315 4880 10315 5080
Connection ~ 10315 5080
Wire Wire Line
	10315 5080 10625 5080
$Comp
L 74xx:74HCT02 U?
U 1 1 64F12844
P 5800 7175
AR Path="/62E48B71/64F12844" Ref="U?"  Part="1" 
AR Path="/63A22C28/64F12844" Ref="U?"  Part="1" 
AR Path="/5E4A465A/64E9FF4C/64F12844" Ref="U?"  Part="1" 
AR Path="/5E4A465A/64F12844" Ref="U5"  Part="1" 
F 0 "U5" H 5800 7500 50  0000 C CNN
F 1 "74HCT02" H 5800 7409 50  0000 C CNN
F 2 "LittleSixteen:DIP-14_W7.62mm_Socket_LongPads" H 5800 7175 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74hct02" H 5800 7175 50  0001 C CNN
F 4 "595-SN74HCT02N" H 5800 7175 50  0001 C CNN "MouserPN"
F 5 "Or 595-SN74HC02N, 595-SN74HCT02NE4" H 5800 7175 50  0001 C CNN "Notes"
	1    5800 7175
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74HCT02 U?
U 2 1 64F1284A
P 4945 7175
AR Path="/62E48B71/64F1284A" Ref="U?"  Part="2" 
AR Path="/63A22C28/64F1284A" Ref="U?"  Part="2" 
AR Path="/5E4A465A/64E9FF4C/64F1284A" Ref="U?"  Part="2" 
AR Path="/5E4A465A/64F1284A" Ref="U5"  Part="2" 
F 0 "U5" H 4945 7500 50  0000 C CNN
F 1 "74HCT02" H 4945 7409 50  0000 C CNN
F 2 "LittleSixteen:DIP-14_W7.62mm_Socket_LongPads" H 4945 7175 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74hct02" H 4945 7175 50  0001 C CNN
F 4 "595-SN74HCT02N" H 4945 7175 50  0001 C CNN "MouserPN"
F 5 "Or 595-SN74HC02N, 595-SN74HCT02NE4" H 4945 7175 50  0001 C CNN "Notes"
	2    4945 7175
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74HCT02 U?
U 3 1 64F12850
P 3885 7075
AR Path="/62E48B71/64F12850" Ref="U?"  Part="3" 
AR Path="/63A22C28/64F12850" Ref="U?"  Part="3" 
AR Path="/5E4A465A/64E9FF4C/64F12850" Ref="U?"  Part="3" 
AR Path="/5E4A465A/64F12850" Ref="U5"  Part="3" 
F 0 "U5" H 3885 7400 50  0000 C CNN
F 1 "74HCT02" H 3885 7309 50  0000 C CNN
F 2 "LittleSixteen:DIP-14_W7.62mm_Socket_LongPads" H 3885 7075 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74hct02" H 3885 7075 50  0001 C CNN
F 4 "595-SN74HCT02N" H 3885 7075 50  0001 C CNN "MouserPN"
F 5 "Or 595-SN74HC02N, 595-SN74HCT02NE4" H 3885 7075 50  0001 C CNN "Notes"
	3    3885 7075
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74HCT02 U?
U 5 1 64F12856
P 1145 6790
AR Path="/62E48B71/64F12856" Ref="U?"  Part="5" 
AR Path="/63A22C28/64F12856" Ref="U?"  Part="5" 
AR Path="/5E4A465A/64E9FF4C/64F12856" Ref="U?"  Part="5" 
AR Path="/5E4A465A/64F12856" Ref="U5"  Part="5" 
F 0 "U5" H 1375 6836 50  0000 L CNN
F 1 "74HCT02" H 1375 6745 50  0000 L CNN
F 2 "LittleSixteen:DIP-14_W7.62mm_Socket_LongPads" H 1145 6790 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74hct02" H 1145 6790 50  0001 C CNN
F 4 "595-SN74HCT02N" H 1145 6790 50  0001 C CNN "MouserPN"
F 5 "Or 595-SN74HC02N, 595-SN74HCT02NE4" H 1145 6790 50  0001 C CNN "Notes"
	5    1145 6790
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 64F1285C
P 1980 6785
AR Path="/64F1285C" Ref="C?"  Part="1" 
AR Path="/62E48B71/64F1285C" Ref="C?"  Part="1" 
AR Path="/63A22C28/64F1285C" Ref="C?"  Part="1" 
AR Path="/5E4A465A/64E9FF4C/64F1285C" Ref="C?"  Part="1" 
AR Path="/5E4A465A/64F1285C" Ref="C8"  Part="1" 
F 0 "C8" H 2095 6831 50  0000 L CNN
F 1 "100n" H 2095 6740 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D8.0mm_W2.5mm_P5.00mm" H 2018 6635 50  0001 C CNN
F 3 "~" H 1980 6785 50  0001 C CNN
F 4 "810-FG28X7R1H104KNT0" H 1980 6785 50  0001 C CNN "MouserPN"
	1    1980 6785
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 64F12862
P 1570 7540
AR Path="/64F12862" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/64F12862" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/64F12862" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/64E9FF4C/64F12862" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/64F12862" Ref="#PWR0283"  Part="1" 
F 0 "#PWR0283" H 1570 7290 50  0001 C CNN
F 1 "GND" H 1570 7390 50  0000 C CNN
F 2 "" H 1570 7540 50  0001 C CNN
F 3 "" H 1570 7540 50  0001 C CNN
	1    1570 7540
	1    0    0    -1  
$EndComp
Wire Wire Line
	1570 6175 1570 6075
Wire Wire Line
	1570 7440 1570 7540
Wire Wire Line
	1145 6290 1145 6175
Wire Wire Line
	1145 6175 1570 6175
Wire Wire Line
	1980 6175 1980 6635
Wire Wire Line
	1980 6935 1980 7440
Wire Wire Line
	1980 7440 1570 7440
Wire Wire Line
	1145 7440 1145 7290
Connection ~ 1570 7440
Wire Wire Line
	1570 7440 1145 7440
Connection ~ 1570 6175
Wire Wire Line
	1570 6175 1980 6175
Wire Wire Line
	3585 6975 3370 6975
Wire Wire Line
	3585 7175 3370 7175
Wire Wire Line
	4185 7075 4645 7075
Text GLabel 3370 7175 0    50   Input ~ 0
R_~W
Text GLabel 3370 6975 0    50   Input ~ 0
PHI0
Wire Wire Line
	4645 7275 4425 7275
Text GLabel 4425 7275 0    50   Input ~ 0
~CAS
Wire Wire Line
	5245 7175 5385 7175
Wire Wire Line
	5385 7175 5385 7075
Wire Wire Line
	5385 7075 5500 7075
Wire Wire Line
	5385 7175 5385 7275
Wire Wire Line
	5385 7275 5500 7275
Connection ~ 5385 7175
Wire Wire Line
	6100 7175 6490 7175
Text Notes 4235 7695 0    50   ~ 0
THIS CIRCUIT WAS DERIVED\nFROM WORK BY ESLAPION
Text Label 6490 7175 2    50   ~ 0
sram_ce
Text Label 11065 4980 2    50   ~ 0
sram_ce
$Comp
L power:VCC #PWR?
U 1 1 66281A14
P 1570 6075
AR Path="/5E6A379E/66281A14" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/66281A14" Ref="#PWR0125"  Part="1" 
F 0 "#PWR0125" H 1570 5925 50  0001 C CNN
F 1 "VCC" H 1587 6248 50  0000 C CNN
F 2 "" H 1570 6075 50  0001 C CNN
F 3 "" H 1570 6075 50  0001 C CNN
	1    1570 6075
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 662F4FB9
P 7335 4525
AR Path="/5E6A379E/662F4FB9" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/662F4FB9" Ref="#PWR0110"  Part="1" 
F 0 "#PWR0110" H 7335 4375 50  0001 C CNN
F 1 "VCC" H 7352 4698 50  0000 C CNN
F 2 "" H 7335 4525 50  0001 C CNN
F 3 "" H 7335 4525 50  0001 C CNN
	1    7335 4525
	1    0    0    -1  
$EndComp
Text Label 8190 4480 0    50   ~ 0
a5
Text Label 10580 4680 2    50   ~ 0
a10
Text Label 8190 4580 0    50   ~ 0
a4
Text Label 8190 4680 0    50   ~ 0
a0
Text Label 8190 4780 0    50   ~ 0
a1
Text Label 8190 4880 0    50   ~ 0
a2
Text Label 8190 4980 0    50   ~ 0
a3
Text Label 10580 4980 2    50   ~ 0
a11
Text Label 3755 5570 0    50   ~ 0
r7
Text Label 3755 5470 0    50   ~ 0
r6
Text Label 3755 5370 0    50   ~ 0
r5
Text Label 3755 5270 0    50   ~ 0
r4
Text Label 3755 5170 0    50   ~ 0
r3
Text Label 3755 5070 0    50   ~ 0
r2
Text Label 3755 4970 0    50   ~ 0
r1
Text Label 3755 4870 0    50   ~ 0
r0
$Comp
L power:VCC #PWR?
U 1 1 662712A6
P 4770 4485
AR Path="/5E6A379E/662712A6" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/662712A6" Ref="#PWR0123"  Part="1" 
F 0 "#PWR0123" H 4770 4335 50  0001 C CNN
F 1 "VCC" H 4787 4658 50  0000 C CNN
F 2 "" H 4770 4485 50  0001 C CNN
F 3 "" H 4770 4485 50  0001 C CNN
	1    4770 4485
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 662623B5
P 6225 4495
AR Path="/5E6A379E/662623B5" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/662623B5" Ref="#PWR0122"  Part="1" 
F 0 "#PWR0122" H 6225 4345 50  0001 C CNN
F 1 "VCC" H 6242 4668 50  0000 C CNN
F 2 "" H 6225 4495 50  0001 C CNN
F 3 "" H 6225 4495 50  0001 C CNN
	1    6225 4495
	1    0    0    -1  
$EndComp
Text GLabel 3755 5870 0    50   Input ~ 0
~CS_RAMRD
$Comp
L Device:C C?
U 1 1 64F128AF
P 6225 4850
AR Path="/64F128AF" Ref="C?"  Part="1" 
AR Path="/62E48B71/64F128AF" Ref="C?"  Part="1" 
AR Path="/63A22C28/64F128AF" Ref="C?"  Part="1" 
AR Path="/5E4A465A/64E9FF4C/64F128AF" Ref="C?"  Part="1" 
AR Path="/5E4A465A/64F128AF" Ref="C9"  Part="1" 
F 0 "C9" H 6110 4804 50  0000 R CNN
F 1 "100n" H 6110 4895 50  0000 R CNN
F 2 "Capacitor_THT:C_Disc_D8.0mm_W2.5mm_P5.00mm" H 6263 4700 50  0001 C CNN
F 3 "~" H 6225 4850 50  0001 C CNN
F 4 "810-FG28X7R1H104KNT0" H 6225 4850 50  0001 C CNN "MouserPN"
	1    6225 4850
	-1   0    0    1   
$EndComp
Entry Wire Line
	3755 4870 3655 4770
Text GLabel 3325 4770 0    50   Input ~ 0
r[0..7]
Wire Bus Line
	3655 4770 3325 4770
Entry Wire Line
	3755 5070 3655 4970
Entry Wire Line
	3755 5270 3655 5170
Entry Wire Line
	3755 5470 3655 5370
Entry Wire Line
	3755 4970 3655 4870
Entry Wire Line
	3755 5170 3655 5070
Entry Wire Line
	3755 5370 3655 5270
Entry Wire Line
	3755 5570 3655 5470
Wire Wire Line
	6225 5000 6225 5185
Wire Wire Line
	6225 4495 6225 4700
$Comp
L power:GND #PWR?
U 1 1 64F1281D
P 6225 5185
AR Path="/64F1281D" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/64F1281D" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/64F1281D" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/64E9FF4C/64F1281D" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/64F1281D" Ref="#PWR0176"  Part="1" 
F 0 "#PWR0176" H 6225 4935 50  0001 C CNN
F 1 "GND" H 6230 5012 50  0000 C CNN
F 2 "" H 6225 5185 50  0001 C CNN
F 3 "" H 6225 5185 50  0001 C CNN
	1    6225 5185
	1    0    0    -1  
$EndComp
Wire Wire Line
	4165 5770 4270 5770
Wire Wire Line
	4770 4525 4770 4570
Connection ~ 4770 4525
Wire Wire Line
	4165 4525 4770 4525
Wire Wire Line
	4165 5770 4165 4525
Wire Wire Line
	4770 6170 4770 6255
Wire Wire Line
	3755 5870 4270 5870
$Comp
L 74xx:74LS245 U?
U 1 1 64F12810
P 4770 5370
AR Path="/5E4A465A/64E9FF4C/64F12810" Ref="U?"  Part="1" 
AR Path="/5E4A465A/64F12810" Ref="U29"  Part="1" 
F 0 "U29" H 4985 6015 50  0000 C CNN
F 1 "74HCT245" H 4995 4705 50  0000 C CNN
F 2 "LittleSixteen:DIP-20_W7.62mm_Socket_LongPads" H 4770 5370 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS245" H 4770 5370 50  0001 C CNN
F 4 "595-SN74HCT245N" H 4770 5370 50  0001 C CNN "MouserPN"
F 5 "Or 595-SN74HCT245NE4" H 4770 5370 50  0001 C CNN "Notes"
	1    4770 5370
	1    0    0    -1  
$EndComp
Wire Wire Line
	4270 5370 3755 5370
Wire Wire Line
	4270 5270 3755 5270
Wire Wire Line
	4270 5170 3755 5170
Wire Wire Line
	4270 5070 3755 5070
Wire Wire Line
	4270 4970 3755 4970
Wire Wire Line
	4270 4870 3755 4870
Wire Wire Line
	4270 5570 3755 5570
Wire Wire Line
	4270 5470 3755 5470
Text Notes 3305 6040 0    50   ~ 0
$FD16 READ
Text Notes 3435 5115 2    50   ~ 0
WE ALSO NEED SOMETHING ELSE TO ALLOW OUR\nRAM CONTROL REGISTER TO BE READ BACK...
$Comp
L power:GND #PWR?
U 1 1 64F1272C
P 4770 6255
AR Path="/64F1272C" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/64F1272C" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/64F1272C" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/64E9FF4C/64F1272C" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/64F1272C" Ref="#PWR0124"  Part="1" 
F 0 "#PWR0124" H 4770 6005 50  0001 C CNN
F 1 "GND" H 4775 6082 50  0000 C CNN
F 2 "" H 4770 6255 50  0001 C CNN
F 3 "" H 4770 6255 50  0001 C CNN
	1    4770 6255
	1    0    0    -1  
$EndComp
Wire Wire Line
	4770 4485 4770 4525
Entry Wire Line
	5635 4970 5535 4870
Entry Wire Line
	5635 5570 5535 5470
Entry Wire Line
	5635 5470 5535 5370
Entry Wire Line
	5635 5370 5535 5270
Entry Wire Line
	5635 5270 5535 5170
Entry Wire Line
	5635 5170 5535 5070
Entry Wire Line
	5635 5070 5535 4970
Text Label 5535 5470 2    50   ~ 0
d6
Text Label 5535 5370 2    50   ~ 0
d5
Text Label 5535 5270 2    50   ~ 0
d4
Text Label 5535 5170 2    50   ~ 0
d3
Text Label 5535 5070 2    50   ~ 0
d2
Text Label 5535 4970 2    50   ~ 0
d1
Text Label 5535 4870 2    50   ~ 0
d0
Wire Wire Line
	5270 5470 5535 5470
Wire Wire Line
	5270 5370 5535 5370
Wire Wire Line
	5270 5270 5535 5270
Wire Wire Line
	5270 5170 5535 5170
Wire Wire Line
	5270 5070 5535 5070
Wire Wire Line
	5270 4970 5535 4970
Wire Wire Line
	5270 4870 5535 4870
Wire Wire Line
	5535 5570 5270 5570
Text GLabel 6165 5670 2    50   Output ~ 0
d[0..7]
Wire Bus Line
	5635 5670 6165 5670
Entry Wire Line
	5635 5670 5535 5570
Text Label 5535 5570 2    50   ~ 0
d7
Text Label 8190 4080 0    50   ~ 0
a9
$Comp
L Device:C C?
U 1 1 64F126B2
P 5150 1385
AR Path="/64F126B2" Ref="C?"  Part="1" 
AR Path="/62E48B71/64F126B2" Ref="C?"  Part="1" 
AR Path="/63A22C28/64F126B2" Ref="C?"  Part="1" 
AR Path="/5E4A465A/64E9FF4C/64F126B2" Ref="C?"  Part="1" 
AR Path="/5E4A465A/64F126B2" Ref="C7"  Part="1" 
F 0 "C7" H 5035 1431 50  0000 R CNN
F 1 "100n" H 5035 1340 50  0000 R CNN
F 2 "Capacitor_THT:C_Disc_D8.0mm_W2.5mm_P5.00mm" H 5188 1235 50  0001 C CNN
F 3 "~" H 5150 1385 50  0001 C CNN
F 4 "810-FG28X7R1H104KNT0" H 5150 1385 50  0001 C CNN "MouserPN"
	1    5150 1385
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 64F126B8
P 5150 1720
AR Path="/64F126B8" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/64F126B8" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/64F126B8" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/64E9FF4C/64F126B8" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/64F126B8" Ref="#PWR0120"  Part="1" 
F 0 "#PWR0120" H 5150 1470 50  0001 C CNN
F 1 "GND" H 5155 1547 50  0000 C CNN
F 2 "" H 5150 1720 50  0001 C CNN
F 3 "" H 5150 1720 50  0001 C CNN
	1    5150 1720
	1    0    0    -1  
$EndComp
Wire Wire Line
	5750 1795 5750 1705
Wire Wire Line
	5750 3490 5750 3395
$Comp
L power:GND #PWR?
U 1 1 64F1274C
P 5750 3490
AR Path="/64F1274C" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/64F1274C" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/64F1274C" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/64E9FF4C/64F1274C" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/64F1274C" Ref="#PWR0126"  Part="1" 
F 0 "#PWR0126" H 5750 3240 50  0001 C CNN
F 1 "GND" H 5755 3317 50  0000 C CNN
F 2 "" H 5750 3490 50  0001 C CNN
F 3 "" H 5750 3490 50  0001 C CNN
	1    5750 3490
	1    0    0    -1  
$EndComp
Wire Wire Line
	4785 2095 5250 2095
Entry Wire Line
	4685 2195 4785 2095
Text Label 4785 2095 0    50   ~ 0
d0
Wire Wire Line
	4785 2295 5250 2295
Entry Wire Line
	4685 2395 4785 2295
Text Label 4785 2295 0    50   ~ 0
d2
Wire Wire Line
	4785 2495 5250 2495
Entry Wire Line
	4685 2595 4785 2495
Text Label 4785 2495 0    50   ~ 0
d4
Wire Wire Line
	4785 2695 5250 2695
Entry Wire Line
	4685 2795 4785 2695
Text Label 4785 2695 0    50   ~ 0
d6
Wire Wire Line
	4785 2195 5250 2195
Entry Wire Line
	4685 2295 4785 2195
Text Label 4790 2195 0    50   ~ 0
d1
Wire Wire Line
	4785 2395 5250 2395
Entry Wire Line
	4685 2495 4785 2395
Text Label 4790 2395 0    50   ~ 0
d3
Wire Wire Line
	4785 2595 5250 2595
Entry Wire Line
	4685 2695 4785 2595
Text Label 4790 2595 0    50   ~ 0
d5
Wire Wire Line
	4785 2795 5250 2795
Text GLabel 3265 2555 2    50   Input ~ 0
d[0..7]
Entry Wire Line
	4685 2895 4785 2795
Text Label 4790 2795 0    50   ~ 0
d7
Wire Wire Line
	6250 2095 6355 2095
Entry Wire Line
	7280 2095 7380 2195
Wire Wire Line
	6250 2295 6555 2295
Entry Wire Line
	7280 2295 7380 2395
Wire Wire Line
	6250 2495 6755 2495
Entry Wire Line
	7280 2495 7380 2595
Wire Wire Line
	6250 2695 6955 2695
Entry Wire Line
	7280 2695 7380 2795
Wire Wire Line
	6250 2195 6455 2195
Entry Wire Line
	7280 2195 7380 2295
Wire Wire Line
	6250 2395 6655 2395
Entry Wire Line
	7280 2395 7380 2495
Wire Wire Line
	6250 2595 6855 2595
Entry Wire Line
	7280 2595 7380 2695
Wire Bus Line
	7380 2895 7710 2895
Wire Bus Line
	4315 2895 4685 2895
Text GLabel 7710 2895 2    50   Output ~ 0
r[0..7]
Text Label 7280 2095 2    50   ~ 0
r0
Wire Bus Line
	1000 2655 1240 2655
Text GLabel 1000 2655 0    50   Input ~ 0
r[0..7]
Wire Wire Line
	5150 1030 5150 1235
Wire Wire Line
	5150 1535 5150 1720
Wire Wire Line
	6250 2795 7055 2795
Entry Wire Line
	7280 2795 7380 2895
$Comp
L 74xx:74LS573 U?
U 1 1 64F12799
P 5750 2595
AR Path="/5E4A465A/64E9FF4C/64F12799" Ref="U?"  Part="1" 
AR Path="/5E4A465A/64F12799" Ref="U6"  Part="1" 
F 0 "U6" H 5950 3245 50  0000 C CNN
F 1 "74HCT573" H 6010 1915 50  0000 C CNN
F 2 "LittleSixteen:DIP-20_W7.62mm_Socket_LongPads" H 5750 2595 50  0001 C CNN
F 3 "74xx/74hc573.pdf" H 5750 2595 50  0001 C CNN
F 4 "595-SN74HCT573NSR" H 5750 2595 50  0001 C CNN "MouserPN"
	1    5750 2595
	1    0    0    -1  
$EndComp
Text Label 4790 3095 0    50   ~ 0
~u3enable
Wire Wire Line
	4685 3480 3715 3480
Wire Wire Line
	4685 3095 5250 3095
Wire Wire Line
	4685 3095 4685 3480
Wire Wire Line
	5250 2995 4770 2995
Wire Wire Line
	6355 1955 6355 2095
Connection ~ 6355 2095
Wire Wire Line
	6355 2095 7280 2095
Wire Wire Line
	6455 1955 6455 2195
Connection ~ 6455 2195
Wire Wire Line
	6455 2195 7280 2195
Wire Wire Line
	6555 1955 6555 2295
Connection ~ 6555 2295
Wire Wire Line
	6555 2295 7280 2295
Wire Wire Line
	6655 1955 6655 2395
Connection ~ 6655 2395
Wire Wire Line
	6655 2395 7280 2395
Wire Wire Line
	6755 1955 6755 2495
Wire Wire Line
	6855 1955 6855 2595
Wire Wire Line
	6955 1955 6955 2695
Wire Wire Line
	7055 1955 7055 2795
Text Label 3340 1755 2    50   ~ 0
a16
Text Label 3340 1855 2    50   ~ 0
a17
Text Label 3335 1955 2    50   ~ 0
a18_from_pla
Wire Wire Line
	3045 2455 2840 2455
Wire Wire Line
	850  3165 850  3065
Wire Wire Line
	850  3465 850  3560
Wire Wire Line
	2340 1555 2340 1445
Wire Wire Line
	2340 2955 2340 3030
Wire Wire Line
	3340 2155 2840 2155
Wire Wire Line
	1840 2555 1340 2555
Wire Wire Line
	1840 2455 1340 2455
Wire Wire Line
	1840 2355 1340 2355
Wire Wire Line
	1840 2255 1340 2255
Wire Wire Line
	1840 2155 1340 2155
Wire Wire Line
	1840 2055 1340 2055
Wire Wire Line
	1840 1955 1340 1955
Wire Wire Line
	1840 1855 1340 1855
Wire Wire Line
	1840 1755 1340 1755
Entry Wire Line
	1240 2655 1340 2555
Entry Wire Line
	1240 2555 1340 2455
Entry Wire Line
	1240 2455 1340 2355
Entry Wire Line
	1240 2355 1340 2255
Entry Wire Line
	1240 2255 1340 2155
Entry Wire Line
	1240 1955 1340 2055
Entry Wire Line
	1240 1855 1340 1955
Entry Wire Line
	1240 1755 1340 1855
Entry Wire Line
	1240 1655 1340 1755
$Comp
L power:GND #PWR?
U 1 1 65058EE7
P 850 3560
AR Path="/64A6E6F3/65058EE7" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/65058EE7" Ref="#PWR0285"  Part="1" 
F 0 "#PWR0285" H 850 3310 50  0001 C CNN
F 1 "GND" H 855 3387 50  0000 C CNN
F 2 "" H 850 3560 50  0001 C CNN
F 3 "" H 850 3560 50  0001 C CNN
	1    850  3560
	1    0    0    -1  
$EndComp
Text Label 1340 2555 0    50   ~ 0
r7
Text Label 1340 2455 0    50   ~ 0
r6
Text Label 1340 2355 0    50   ~ 0
r2
Text Label 1340 2255 0    50   ~ 0
r1
Text Label 1340 2155 0    50   ~ 0
r0
Text Label 1340 2055 0    50   ~ 0
a12
Text Label 1340 1955 0    50   ~ 0
a13
Text Label 1340 1855 0    50   ~ 0
a14
Text Label 1340 1755 0    50   ~ 0
a15
$Comp
L power:GND #PWR?
U 1 1 65058EF8
P 2340 3030
AR Path="/64A6E6F3/65058EF8" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/65058EF8" Ref="#PWR0286"  Part="1" 
F 0 "#PWR0286" H 2340 2780 50  0001 C CNN
F 1 "GND" H 2345 2857 50  0000 C CNN
F 2 "" H 2340 3030 50  0001 C CNN
F 3 "" H 2340 3030 50  0001 C CNN
	1    2340 3030
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 65058EFF
P 850 3065
AR Path="/64A6E6F3/65058EFF" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/65058EFF" Ref="#PWR0287"  Part="1" 
F 0 "#PWR0287" H 850 2915 50  0001 C CNN
F 1 "VCC" H 865 3238 50  0000 C CNN
F 2 "" H 850 3065 50  0001 C CNN
F 3 "" H 850 3065 50  0001 C CNN
	1    850  3065
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 65058F05
P 2340 1445
AR Path="/64A6E6F3/65058F05" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/65058F05" Ref="#PWR0288"  Part="1" 
F 0 "#PWR0288" H 2340 1295 50  0001 C CNN
F 1 "VCC" H 2355 1618 50  0000 C CNN
F 2 "" H 2340 1445 50  0001 C CNN
F 3 "" H 2340 1445 50  0001 C CNN
	1    2340 1445
	1    0    0    -1  
$EndComp
Text GLabel 1045 1500 0    50   Input ~ 0
a[0..15]
Wire Bus Line
	1045 1500 1240 1500
$Comp
L Logic_Programmable:GAL16V8 U?
U 1 1 65058F10
P 2340 2255
AR Path="/64A6E6F3/65058F10" Ref="U?"  Part="1" 
AR Path="/5EE7AAEB/65058F10" Ref="U?"  Part="1" 
AR Path="/5E4A465A/65058F10" Ref="U26"  Part="1" 
F 0 "U26" H 2605 2855 50  0000 C CNN
F 1 "GAL16V8" H 2530 1650 50  0000 C CNN
F 2 "LittleSixteen:DIP-20_W7.62mm_Socket_LongPads" H 2340 2255 50  0001 C CNN
F 3 "" H 2340 2255 50  0001 C CNN
F 4 "556-AF16V8B15PU" H 2340 2255 50  0001 C CNN "MouserPN"
F 5 "GAL16V8" H 2340 2255 50  0001 C CNN "Value"
	1    2340 2255
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 65058F18
P 850 3315
AR Path="/64A6E6F3/65058F18" Ref="C?"  Part="1" 
AR Path="/5EE7AAEB/65058F18" Ref="C?"  Part="1" 
AR Path="/5E4A465A/65058F18" Ref="C56"  Part="1" 
F 0 "C56" H 965 3361 50  0000 L CNN
F 1 "100n" H 965 3270 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D8.0mm_W2.5mm_P5.00mm" H 888 3165 50  0001 C CNN
F 3 "~" H 850 3315 50  0001 C CNN
F 4 "810-FG28X7R1H104KNT0" H 850 3315 50  0001 C CNN "MouserPN"
F 5 "100n" H 850 3315 50  0001 C CNN "Value"
	1    850  3315
	1    0    0    -1  
$EndComp
Text Notes 1730 775  0    157  ~ 0
PLA - 2 -
Text GLabel 4770 2995 0    50   Input ~ 0
CS_RAMWR
Text Notes 4665 3220 2    50   ~ 0
$FD16 WRITE\n(NOTE: ACTIVE *HIGH*!)
Wire Wire Line
	2840 1755 3340 1755
Wire Wire Line
	2840 1855 3340 1855
Wire Wire Line
	2840 1955 3340 1955
NoConn ~ 3715 3680
$Comp
L 74xx:74LS74 U?
U 2 1 65BE35EB
P 3415 3580
AR Path="/64A6E6F3/65BE35EB" Ref="U?"  Part="2" 
AR Path="/5E4A465A/65BE35EB" Ref="U25"  Part="2" 
F 0 "U25" H 3585 3840 50  0000 C CNN
F 1 "74HCT74" H 3610 3320 50  0000 C CNN
F 2 "LittleSixteen:DIP-14_W7.62mm_Socket_LongPads" H 3415 3580 50  0001 C CNN
F 3 "74xx/74hc_hct74.pdf" H 3415 3580 50  0001 C CNN
F 4 "595-SN74HC74N" H 3415 3580 50  0001 C CNN "MouserPN"
	2    3415 3580
	1    0    0    -1  
$EndComp
Wire Wire Line
	3115 3480 3000 3480
Wire Wire Line
	3000 3480 3000 3580
Wire Wire Line
	3115 3580 3000 3580
Connection ~ 3000 3580
Wire Wire Line
	3000 3580 3000 3625
$Comp
L power:GND #PWR?
U 1 1 65CA996B
P 3000 3625
AR Path="/65CA996B" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/65CA996B" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/65CA996B" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/64E9FF4C/65CA996B" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/65CA996B" Ref="#PWR0289"  Part="1" 
F 0 "#PWR0289" H 3000 3375 50  0001 C CNN
F 1 "GND" H 3005 3452 50  0000 C CNN
F 2 "" H 3000 3625 50  0001 C CNN
F 3 "" H 3000 3625 50  0001 C CNN
	1    3000 3625
	1    0    0    -1  
$EndComp
Text GLabel 3225 3185 0    50   Input ~ 0
~RESET
Wire Wire Line
	3225 3185 3415 3185
Wire Wire Line
	3415 3185 3415 3280
$Comp
L 74xx:74HCT02 U?
U 4 1 65DF129B
P 2680 4190
AR Path="/62E48B71/65DF129B" Ref="U?"  Part="4" 
AR Path="/63A22C28/65DF129B" Ref="U?"  Part="4" 
AR Path="/5E4A465A/64E9FF4C/65DF129B" Ref="U?"  Part="4" 
AR Path="/5E4A465A/65DF129B" Ref="U5"  Part="4" 
F 0 "U5" H 2680 4515 50  0000 C CNN
F 1 "74HCT02" H 2680 4424 50  0000 C CNN
F 2 "LittleSixteen:DIP-14_W7.62mm_Socket_LongPads" H 2680 4190 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74hct02" H 2680 4190 50  0001 C CNN
F 4 "595-SN74HCT02N" H 2680 4190 50  0001 C CNN "MouserPN"
F 5 "Or 595-SN74HC02N, 595-SN74HCT02NE4" H 2680 4190 50  0001 C CNN "Notes"
	4    2680 4190
	1    0    0    -1  
$EndComp
Wire Wire Line
	2380 4090 2245 4090
Wire Wire Line
	2245 4090 2245 4190
Wire Wire Line
	2245 4290 2380 4290
Wire Wire Line
	2245 4190 2090 4190
Connection ~ 2245 4190
Wire Wire Line
	2245 4190 2245 4290
Text Label 3000 4190 0    50   ~ 0
~cs_ramwr
Wire Wire Line
	2980 4190 3415 4190
Text GLabel 2090 4190 0    50   Input ~ 0
CS_RAMWR
Wire Wire Line
	3415 3880 3415 4190
Wire Wire Line
	3100 2055 2840 2055
Wire Wire Line
	3045 2355 2840 2355
Wire Wire Line
	4090 1790 4090 1690
Wire Wire Line
	4155 2355 4090 2355
Wire Wire Line
	4090 2355 4090 2455
$Comp
L power:GND #PWR?
U 1 1 6616A4EF
P 4090 2455
AR Path="/6616A4EF" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/6616A4EF" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/6616A4EF" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/64E9FF4C/6616A4EF" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/6616A4EF" Ref="#PWR0291"  Part="1" 
F 0 "#PWR0291" H 4090 2205 50  0001 C CNN
F 1 "GND" H 4095 2282 50  0000 C CNN
F 2 "" H 4090 2455 50  0001 C CNN
F 3 "" H 4090 2455 50  0001 C CNN
	1    4090 2455
	1    0    0    -1  
$EndComp
Entry Wire Line
	3145 2455 3045 2355
Entry Wire Line
	3145 2555 3045 2455
Wire Bus Line
	3265 2555 3145 2555
Wire Bus Line
	3145 2455 3145 2555
Text Label 3045 2455 2    50   ~ 0
d2
Text Label 3045 2355 2    50   ~ 0
d1
Wire Wire Line
	2840 2255 3470 2255
$Comp
L power:VCC #PWR?
U 1 1 662A014F
P 5750 1705
AR Path="/5E6A379E/662A014F" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/662A014F" Ref="#PWR0127"  Part="1" 
F 0 "#PWR0127" H 5750 1555 50  0001 C CNN
F 1 "VCC" H 5767 1878 50  0000 C CNN
F 2 "" H 5750 1705 50  0001 C CNN
F 3 "" H 5750 1705 50  0001 C CNN
	1    5750 1705
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 662BC6FB
P 5150 1030
AR Path="/5E6A379E/662BC6FB" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/662BC6FB" Ref="#PWR0135"  Part="1" 
F 0 "#PWR0135" H 5150 880 50  0001 C CNN
F 1 "VCC" H 5167 1203 50  0000 C CNN
F 2 "" H 5150 1030 50  0001 C CNN
F 3 "" H 5150 1030 50  0001 C CNN
	1    5150 1030
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 662BCD22
P 6355 1385
AR Path="/5E6A379E/662BCD22" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/662BCD22" Ref="#PWR0136"  Part="1" 
F 0 "#PWR0136" H 6355 1235 50  0001 C CNN
F 1 "VCC" H 6372 1558 50  0000 C CNN
F 2 "" H 6355 1385 50  0001 C CNN
F 3 "" H 6355 1385 50  0001 C CNN
	1    6355 1385
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 6630FA01
P 4090 1690
AR Path="/5E6A379E/6630FA01" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/6630FA01" Ref="#PWR0137"  Part="1" 
F 0 "#PWR0137" H 4090 1540 50  0001 C CNN
F 1 "VCC" H 4107 1863 50  0000 C CNN
F 2 "" H 4090 1690 50  0001 C CNN
F 3 "" H 4090 1690 50  0001 C CNN
	1    4090 1690
	1    0    0    -1  
$EndComp
Text Label 7280 2195 2    50   ~ 0
r1
Text Label 7280 2295 2    50   ~ 0
r2
Text Label 7280 2395 2    50   ~ 0
r3
Text Label 7280 2495 2    50   ~ 0
r4
Text Label 7280 2595 2    50   ~ 0
r5
Text Label 7280 2695 2    50   ~ 0
r6
Text Label 7280 2795 2    50   ~ 0
r7
Text GLabel 4315 2895 0    50   Input ~ 0
d[0..7]
Text GLabel 1525 2655 0    50   Input ~ 0
AEC
Wire Wire Line
	1840 2655 1525 2655
$Comp
L Device:R_Network08 RP7
U 1 1 6475B295
P 6755 1755
F 0 "RP7" H 7143 1801 50  0000 L CNN
F 1 "10k" H 7143 1710 50  0000 L CNN
F 2 "Resistor_THT:R_Array_SIP9" V 7230 1755 50  0001 C CNN
F 3 "http://www.vishay.com/docs/31509/csc.pdf" H 6755 1755 50  0001 C CNN
F 4 "Bussed" H 6755 1755 50  0001 C CNN "Notes"
	1    6755 1755
	1    0    0    -1  
$EndComp
Wire Wire Line
	6355 1385 6355 1555
Connection ~ 6755 2495
Connection ~ 6855 2595
Connection ~ 6955 2695
Connection ~ 7055 2795
Wire Wire Line
	6755 2495 7280 2495
Wire Wire Line
	6855 2595 7280 2595
Wire Wire Line
	6955 2695 7280 2695
Wire Wire Line
	7055 2795 7280 2795
Text GLabel 3100 2055 2    50   Output ~ 0
~JOY1
Text GLabel 3340 2155 2    50   Output ~ 0
~JOY2
Text Notes 940  1135 0    50   ~ 0
Generates:\n- High RAM address bits, depending on the contents of the $FD16\n  register, implementing the Hannes logic\n-  ~CS~ signals for joystick buffers, with the possibility of swapping them
$Comp
L AS6C4008:AS6C4008 U30
U 1 1 64EB8905
P 9385 4830
F 0 "U30" H 9385 5945 50  0000 C CNN
F 1 "AS6C4008" H 9385 5854 50  0000 C CNN
F 2 "Package_DIP:DIP-32_W15.24mm_Socket_LongPads" H 9385 4830 50  0001 C CNN
F 3 "DOCUMENTATION" H 9385 4830 50  0001 C CNN
F 4 "913-AS6C4008-55PIN" H 9385 4830 50  0001 C CNN "MouserPN"
F 5 "Or AS6C4008-55PCN" H 9385 4830 50  0001 C CNN "Notes"
	1    9385 4830
	1    0    0    -1  
$EndComp
Wire Wire Line
	10315 4080 10315 3735
Wire Bus Line
	8090 3435 7125 3435
Wire Bus Line
	8090 3435 10680 3435
Connection ~ 8090 3435
Text GLabel 7125 3435 0    50   Input ~ 0
a[0..15]
$Comp
L power:VCC #PWR?
U 1 1 662DA0C4
P 10315 3735
AR Path="/5E6A379E/662DA0C4" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/662DA0C4" Ref="#PWR0119"  Part="1" 
F 0 "#PWR0119" H 10315 3585 50  0001 C CNN
F 1 "VCC" H 10332 3908 50  0000 C CNN
F 2 "" H 10315 3735 50  0001 C CNN
F 3 "" H 10315 3735 50  0001 C CNN
	1    10315 3735
	1    0    0    -1  
$EndComp
Text Notes 8240 6490 0    50   ~ 0
Note that address bits and data bits can be swapped freely\nhere since no refresh mechanism is involved, so let's just\nassign everything in order to simplify routing!
Text Notes 7635 2560 0    50   ~ 0
Another idea from Levente Hársfalvi in order to achieve the "high at reset"\nbehaviour of the MOS 6529 that was originally used in Hannes/Solder's\ndesign for the control register: keep the 74x573 in Hi-Z until the first write\nto $FD16 and use pull-ups on its output. All hail TLC!
Text Notes 11100 1455 2    118  ~ 0
- WE USE A SINGLE STATIC RAM CHIP\n- WE SUPPORT A HANNES-STYLE MECHANISM\n  FOR RAM EXPANSION TO UP TO 512 KB\n- WE PROVIDE A SWITCH TO LIMIT THE RAM\n  TO 256 KB FOR COMPATIBLITY
$Comp
L Device:R R?
U 1 1 65A92B25
P 4090 1940
AR Path="/5E019FCB/65A92B25" Ref="R?"  Part="1" 
AR Path="/5E4A465A/65A92B25" Ref="R97"  Part="1" 
F 0 "R97" H 4020 1894 50  0000 R CNN
F 1 "10k" H 4020 1985 50  0000 R CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical" V 4020 1940 50  0001 C CNN
F 3 "~" H 4090 1940 50  0001 C CNN
F 4 "603-MFR-25FTF52-10K" H 4090 1940 50  0001 C CNN "MouserPN"
	1    4090 1940
	-1   0    0    1   
$EndComp
$Comp
L Connector:Conn_01x02_Male CN?
U 1 1 65AA1AF3
P 4355 2355
AR Path="/64A6E6F3/65AA1AF3" Ref="CN?"  Part="1" 
AR Path="/5E4A465A/65AA1AF3" Ref="JP17"  Part="1" 
F 0 "JP17" H 4530 2415 50  0000 R CNN
F 1 "SW_JOYSWAP" H 4535 2495 50  0000 R CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical" H 4355 2355 50  0001 C CNN
F 3 "~" H 4355 2355 50  0001 C CNN
	1    4355 2355
	-1   0    0    1   
$EndComp
Wire Wire Line
	4090 2090 4090 2255
Connection ~ 4090 2255
Wire Wire Line
	4090 2255 4155 2255
$Comp
L Jumper:Jumper_3_Bridged12 JP?
U 1 1 6758122B
P 3590 1955
AR Path="/5EE476E1/6758122B" Ref="JP?"  Part="1" 
AR Path="/5E4A465A/6758122B" Ref="JP4"  Part="1" 
F 0 "JP4" H 3590 1650 50  0000 C CNN
F 1 "SW_RAMSIZE" H 3590 1565 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" H 3590 1955 50  0001 C CNN
F 3 "~" H 3590 1955 50  0001 C CNN
F 4 "---" H 3590 1955 50  0001 C CNN "MouserPN"
	1    3590 1955
	1    0    0    1   
$EndComp
Wire Wire Line
	3590 1805 3590 1755
Wire Wire Line
	3590 1755 3790 1755
Wire Wire Line
	3840 1955 3910 1955
Wire Wire Line
	3910 1955 3910 2055
$Comp
L power:GND #PWR?
U 1 1 675B33AC
P 3910 2055
AR Path="/675B33AC" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/675B33AC" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/675B33AC" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/64E9FF4C/675B33AC" Ref="#PWR?"  Part="1" 
AR Path="/5E4A465A/675B33AC" Ref="#PWR039"  Part="1" 
F 0 "#PWR039" H 3910 1805 50  0001 C CNN
F 1 "GND" H 3910 1900 50  0000 C CNN
F 2 "" H 3910 2055 50  0001 C CNN
F 3 "" H 3910 2055 50  0001 C CNN
	1    3910 2055
	-1   0    0    -1  
$EndComp
Text Label 3790 1755 2    50   ~ 0
a18
Text Notes 3410 1920 0    50   ~ 0
512\nkB
Text Notes 3875 1920 2    50   ~ 0
256\nkB
Text GLabel 3570 2355 2    50   Output ~ 0
~JOYSWAP
Wire Wire Line
	3570 2355 3470 2355
Wire Wire Line
	3470 2355 3470 2255
Wire Bus Line
	8090 5180 8090 6210
Wire Bus Line
	1240 1500 1240 1955
Wire Bus Line
	1240 2255 1240 2655
Wire Bus Line
	10680 3435 10680 4880
Wire Bus Line
	10680 5080 10680 6210
Wire Bus Line
	3655 4770 3655 5470
Wire Bus Line
	5635 4970 5635 5670
Wire Bus Line
	4685 2195 4685 2895
Wire Bus Line
	7380 2195 7380 2895
Wire Bus Line
	8090 3435 8090 5080
Connection ~ 3470 2255
Wire Wire Line
	3470 2255 4090 2255
$EndSCHEMATC