Checkpoint.

MicroSci Floppy Controller.kicad_pro

@@ -175,6 +175,7 @@
         0.0,
         0.2032,
         0.381,
+        0.762,
         1.27
       ],
       "via_dimensions": [
@@ -393,7 +394,7 @@
       "no_connect_dangling": "warning",
       "pin_not_connected": "error",
       "pin_not_driven": "error",
-      "pin_to_pin": "warning",
+      "pin_to_pin": "error",
       "power_pin_not_driven": "error",
       "similar_labels": "warning",
       "simulation_model_issue": "ignore",
@@ -495,6 +496,38 @@
     [
       "64043e33-3b28-405d-9d3c-08aaa7913d75",
       "Decoupling"
+    ],
+    [
+      "43f3e9dc-0c99-443e-a34d-bc692710ad49",
+      "Drive Control"
+    ],
+    [
+      "bd654527-08bd-4eb9-83f7-f64c139ee492",
+      "Firmware"
+    ],
+    [
+      "be8d7890-17f4-4d7c-8633-e8669e41081f",
+      "Clock Generators"
+    ],
+    [
+      "115616a6-af28-445c-90be-c24fb7c086f6",
+      "Floppy Connectors"
+    ],
+    [
+      "1686874e-b08c-47f6-8586-0f47aede2d9b",
+      "Floppy Write Logic"
+    ],
+    [
+      "cc0ea5c1-a085-4cfd-9650-901f3700426c",
+      "Floppy Read Logic"
+    ],
+    [
+      "40d4e9fe-2818-43a4-8bd8-a7f7b94f02a6",
+      "Shift Register Logic"
+    ],
+    [
+      "ed2e7c6b-25e3-4f68-a8ae-6b3bbdcfcac1",
+      "Miscellaneous"
     ]
   ],
   "text_variables": {}

README.md

@@ -15,6 +15,14 @@ v0.2 has the following enhancements over the original design:
 * ground pours used to increase operational stability
 * support for using Floppy Emu in dual-drive emulation mode with one cable
 
+v0.3 has the following enhancements over v0.2:
+
+* a 74LS245 octal buffer has been added to the data bus, to facilitate the use of a no-slot clock under the firmware EPROM
+* the EPROM has been changed from 2716/2732 to 2764/27128/27256 to allow a no-slot clock to be placed in the socket without modification
+* all logic chips, except the 74LS245 at U19, can and should be 74HCT/74ACT to reduce power consumption to a fraction of the original design
+* the transistor that switched the +5VDC power line for half of the board has been eliminated -- with CMOS, the board can stay powered at all times
+* the circuit board layout has been streamlined in alignment with the above bullet points
+
 Firmware images can be built via the Makefile in the firmware subdirectory.  The build framework requires cc65.
 
 ![usci](usci.png?raw=true "usci")

bus_interface.kicad_sch

@@ -2,7 +2,14 @@
 
   (uuid e98703f3-e9a1-4f05-8904-ebbc6ab10628)
 
-  (paper "A4")
+  (paper "A5" portrait)
+
+  (title_block
+    (title "MicroSci Floppy Controller (Apple bus interface)")
+    (date "2023-08-25")
+    (rev "0.3")
+    (company "RyuCats")
+  )
 
   (lib_symbols
     (symbol "74xx:74LS02" (pin_names (offset 1.016)) (in_bom yes) (on_board yes)
@@ -1271,424 +1278,504 @@
     )
   )
 
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     )
   )
 
-  (symbol (lib_id "apple2:A2Bus") (at 154.8892 89.4588 0) (unit 1)
+  (symbol (lib_id "apple2:A2Bus") (at 69.596 91.186 0) (unit 1)
     (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced)
     (uuid 4ea1c7ee-a1be-4bb5-805a-999e282ee93c)
-    (property "Reference" "J1" (at 159.3851 45.2628 0)
+    (property "Reference" "J1" (at 74.0919 46.99 0)
       (effects (font (size 1.524 1.524)) (justify left))
     )
-    (property "Value" "A2Bus" (at 159.3851 47.8028 0)
+    (property "Value" "A2Bus" (at 74.0919 49.53 0)
       (effects (font (size 1.524 1.524)) (justify left))
     )
-    (property "Footprint" "apple2:Male_Card-Edge_50_pin__100_mil" (at 154.8892 89.4588 0)
+    (property "Footprint" "apple2:Male_Card-Edge_50_pin__100_mil" (at 69.596 91.186 0)
       (effects (font (size 1.524 1.524)) hide)
     )
-    (property "Datasheet" "https://allpinouts.org/pinouts/connectors/buses/apple-ii-slot/" (at 154.8892 89.4588 0)
+    (property "Datasheet" "https://allpinouts.org/pinouts/connectors/buses/apple-ii-slot/" (at 69.596 91.186 0)
       (effects (font (size 1.524 1.524)) hide)
     )
     (pin "1" (uuid 751a4358-a05d-4750-917d-7959a7e34b3c))
@@ -1819,19 +1906,19 @@
     )
   )
 
-  (symbol (lib_id "power:GND") (at 122.3772 36.1188 0) (mirror x) (unit 1)
+  (symbol (lib_id "power:GND") (at 37.084 37.846 0) (mirror x) (unit 1)
     (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced)
     (uuid 6f9b1d46-bf04-4cfe-9ea4-b9407e7495d8)
-    (property "Reference" "#PWR02" (at 122.3772 29.7688 0)
+    (property "Reference" "#PWR02" (at 37.084 31.496 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "GND" (at 122.3772 31.5468 0)
+    (property "Value" "GND" (at 37.084 33.274 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Footprint" "" (at 122.3772 36.1188 0)
+    (property "Footprint" "" (at 37.084 37.846 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (at 122.3772 36.1188 0)
+    (property "Datasheet" "" (at 37.084 37.846 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid 77a7fe3a-7308-4e85-865d-89d5189aec14))
@@ -1852,19 +1939,19 @@
     )
   )
 
-  (symbol (lib_id "74xx:74LS245") (at 122.3772 56.4388 0) (mirror x) (unit 1)
+  (symbol (lib_id "74xx:74LS245") (at 37.084 58.166 0) (mirror x) (unit 1)
     (in_bom yes) (on_board yes) (dnp no)
     (uuid 970e6ba0-6847-4710-974c-10fdad6feaeb)
-    (property "Reference" "U19" (at 122.0313 76.4032 0)
+    (property "Reference" "U19" (at 36.7381 78.1304 0)
       (effects (font (size 1.27 1.27)) (justify right))
     )
-    (property "Value" "74LS245" (at 122.0313 73.8632 0)
+    (property "Value" "74LS245" (at 36.7381 75.5904 0)
       (effects (font (size 1.27 1.27)) (justify right))
     )
-    (property "Footprint" "Package_DIP:DIP-20_W7.62mm" (at 122.3772 56.4388 0)
+    (property "Footprint" "Package_DIP:DIP-20_W7.62mm" (at 37.084 58.166 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "http://www.ti.com/lit/gpn/sn74LS245" (at 122.3772 56.4388 0)
+    (property "Datasheet" "http://www.ti.com/lit/gpn/sn74LS245" (at 37.084 58.166 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid cb8cf17d-8c9b-4bf6-87fa-9be47d87a175))
@@ -1896,19 +1983,19 @@
     )
   )
 
-  (symbol (lib_id "74xx:74LS14") (at 181.1528 112.3188 0) (unit 1)
+  (symbol (lib_id "74xx:74LS14") (at 95.8596 114.046 0) (unit 1)
     (in_bom yes) (on_board yes) (dnp no)
     (uuid b2cded1c-309e-4cbd-bad3-f3c833a07055)
-    (property "Reference" "U3" (at 181.1528 103.4288 0)
+    (property "Reference" "U3" (at 95.8596 105.156 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Value" "CD74ACT14E" (at 181.1528 105.9688 0)
+    (property "Value" "CD74ACT14E" (at 95.8596 107.696 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Footprint" "Package_DIP:DIP-14_W7.62mm" (at 181.1528 112.3188 0)
+    (property "Footprint" "Package_DIP:DIP-14_W7.62mm" (at 95.8596 114.046 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "http://www.ti.com/lit/gpn/sn74LS14" (at 181.1528 112.3188 0)
+    (property "Datasheet" "http://www.ti.com/lit/gpn/sn74LS14" (at 95.8596 114.046 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid bc0869c0-715b-43fc-9320-35ec34b9ffd8))
@@ -1937,19 +2024,19 @@
     )
   )
 
-  (symbol (lib_id "power:+12V") (at 157.4292 41.4528 0) (unit 1)
+  (symbol (lib_id "power:+12V") (at 72.136 43.18 0) (unit 1)
     (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced)
     (uuid caefd1a5-b06d-4751-9d42-e9beeb5bed26)
-    (property "Reference" "#PWR05" (at 157.4292 45.2628 0)
+    (property "Reference" "#PWR05" (at 72.136 46.99 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "+12V" (at 157.4292 36.3728 0)
+    (property "Value" "+12V" (at 72.136 38.1 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Footprint" "" (at 157.4292 41.4528 0)
+    (property "Footprint" "" (at 72.136 43.18 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (at 157.4292 41.4528 0)
+    (property "Datasheet" "" (at 72.136 43.18 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid 2eb12d26-fabf-47e9-8114-61c345a7a3b5))
@@ -1965,19 +2052,19 @@
     )
   )
 
-  (symbol (lib_id "power:-12V") (at 160.4772 137.7188 0) (unit 1)
+  (symbol (lib_id "power:-12V") (at 75.184 139.446 0) (unit 1)
     (in_bom yes) (on_board yes) (dnp no)
     (uuid ccf2f149-38e3-4b62-9a25-a1f3da080a68)
-    (property "Reference" "#PWR03" (at 160.4772 135.1788 0)
+    (property "Reference" "#PWR03" (at 75.184 136.906 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "-12V" (at 163.7792 135.1788 0)
+    (property "Value" "-12V" (at 78.486 136.906 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Footprint" "" (at 160.4772 137.7188 0)
+    (property "Footprint" "" (at 75.184 139.446 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (at 160.4772 137.7188 0)
+    (property "Datasheet" "" (at 75.184 139.446 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid bcb56162-0559-4194-9afe-92d1342b5663))
@@ -1993,19 +2080,19 @@
     )
   )
 
-  (symbol (lib_id "power:+5V") (at 152.3492 41.4528 0) (unit 1)
+  (symbol (lib_id "power:+5V") (at 67.056 43.18 0) (unit 1)
     (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced)
     (uuid d55d7e81-1b15-4ec7-b831-9bb71ffedc02)
-    (property "Reference" "#PWR01" (at 152.3492 45.2628 0)
+    (property "Reference" "#PWR01" (at 67.056 46.99 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "+5V" (at 152.3492 37.3888 0)
+    (property "Value" "+5V" (at 67.056 39.116 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Footprint" "" (at 152.3492 41.4528 0)
+    (property "Footprint" "" (at 67.056 43.18 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (at 152.3492 41.4528 0)
+    (property "Datasheet" "" (at 67.056 43.18 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid bfee9ce7-f431-49fe-bfb9-c552078e40d6))
@@ -2026,19 +2113,19 @@
     )
   )
 
-  (symbol (lib_id "74xx:74LS02") (at 195.326 83.9216 0) (unit 3)
+  (symbol (lib_id "74xx:74LS02") (at 105.8164 85.6996 0) (unit 3)
     (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced)
     (uuid ec8f8026-df44-449d-8487-1e9b73cc3cd2)
-    (property "Reference" "U18" (at 195.326 75.5396 0)
+    (property "Reference" "U18" (at 105.8164 77.3176 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Value" "CD74ACT02E" (at 195.326 78.0796 0)
+    (property "Value" "CD74ACT02E" (at 105.8164 79.8576 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Footprint" "Package_DIP:DIP-14_W7.62mm" (at 195.326 83.9216 0)
+    (property "Footprint" "Package_DIP:DIP-14_W7.62mm" (at 105.8164 85.6996 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "http://www.ti.com/lit/gpn/sn74ls02" (at 195.326 83.9216 0)
+    (property "Datasheet" "http://www.ti.com/lit/gpn/sn74ls02" (at 105.8164 85.6996 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid 48254d84-5ff4-49b7-990d-7404d490ddf7))
@@ -2067,19 +2154,19 @@
     )
   )
 
-  (symbol (lib_id "power:GND") (at 154.8892 140.0048 0) (unit 1)
+  (symbol (lib_id "power:GND") (at 69.596 141.732 0) (unit 1)
     (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced)
     (uuid fe224e53-d16b-4530-8fd3-013b6758f86c)
-    (property "Reference" "#PWR02" (at 154.8892 146.3548 0)
+    (property "Reference" "#PWR02" (at 69.596 148.082 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "GND" (at 154.8892 144.5768 0)
+    (property "Value" "GND" (at 69.596 146.304 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Footprint" "" (at 154.8892 140.0048 0)
+    (property "Footprint" "" (at 69.596 141.732 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (at 154.8892 140.0048 0)
+    (property "Datasheet" "" (at 69.596 141.732 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid 170da1f0-f586-4e0c-b18a-8c68326fca76))

decoupling.kicad_sch

@@ -4,6 +4,13 @@
 
   (paper "A4")
 
+  (title_block
+    (title "MicroSci Floppy Controller (decoupling / unused gates)")
+    (date "2023-08-25")
+    (rev "0.3")
+    (company "RyuCats")
+  )
+
   (lib_symbols
     (symbol "74xx:74LS00" (pin_names (offset 1.016)) (in_bom yes) (on_board yes)
       (property "Reference" "U" (at 0 1.27 0)

drive_control.kicad_sch

@@ -4,6 +4,13 @@
 
   (paper "A4")
 
+  (title_block
+    (title "MicroSci Floppy Controller (drive control registers)")
+    (date "2023-08-25")
+    (rev "0.3")
+    (company "RyuCats")
+  )
+
   (lib_symbols
     (symbol "74xx:74LS00" (pin_names (offset 1.016)) (in_bom yes) (on_board yes)
       (property "Reference" "U" (at 0 1.27 0)
@@ -1654,7 +1661,7 @@
     (stroke (width 0) (type default))
     (uuid 84fdde1b-b7b6-4f48-83ac-f963206cb9cb)
   )
-  (wire (pts (xy 137.4648 102.616) (xy 140.97 102.616))
+  (wire (pts (xy 137.4648 102.616) (xy 191.8716 102.616))
     (stroke (width 0) (type default))
     (uuid 8624924b-dea7-47a5-8f25-010d5290d575)
   )
@@ -1807,6 +1814,11 @@
     (effects (font (size 1.27 1.27)) (justify left bottom))
     (uuid ced374ba-4c16-43f1-b9c7-f407adc977bc)
   )
+  (text "The 74xx259 is the latch for drive control.\n\nAddress mapping (base address logic 0, address+1 logic 1):\n\n* C060: stepper motor phase 0\n* C062: stepper motor phase 1\n* C064: stepper motor phase 2\n* C066: stepper motor phase 3\n* C068: enable drive\n* C06A: drive A/B select\n* C06C: Q6 (feature Q6)\n* C06E: latch I/O direction setup (aka Q7)"
+    (at 28.702 109.0168 0)
+    (effects (font (size 1.27 1.27)) (justify left bottom))
+    (uuid ecd6d448-8713-4403-a857-a5d5fa166ab8)
+  )
   (text "Card reset (open-collector from Apple bus)" (at 102.87 20.066 0)
     (effects (font (size 1.27 1.27)) (justify left bottom))
     (uuid f0d7ff15-79ea-48e1-baea-37d33e3ebe8b)
@@ -1836,14 +1848,14 @@
       (effects (font (size 1.27 1.27)) (justify right) hide)
     )
   )
-  (global_label "~{DRIVE_ENABLE_B}" (shape input) (at 191.6176 137.9728 0) (fields_autoplaced)
+  (global_label "~{FLOPPY_DRIVE_ENABLE_B}" (shape input) (at 191.6176 137.9728 0) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify left))
     (uuid 29ea113d-5b76-4dfe-9905-04de854276f5)
     (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 198.8777 137.9728 0)
       (effects (font (size 1.27 1.27)) (justify left) hide)
     )
   )
-  (global_label "PH3" (shape input) (at 192.0494 94.996 0) (fields_autoplaced)
+  (global_label "FLOPPY_PHASE_3" (shape input) (at 192.0494 94.996 0) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify left))
     (uuid 3056c8ca-172f-4a00-9be4-3fff9754c079)
     (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 198.7652 94.996 0)
@@ -1864,14 +1876,14 @@
       (effects (font (size 1.27 1.27)) (justify right) hide)
     )
   )
-  (global_label "RW1" (shape input) (at 140.97 102.616 0) (fields_autoplaced)
+  (global_label "Q6" (shape input) (at 191.8716 102.616 0) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify left))
     (uuid 617e9f32-c2d3-4706-9e3e-340cc52b3ce5)
-    (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 147.8861 102.616 0)
+    (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 198.7877 102.616 0)
       (effects (font (size 1.27 1.27)) (justify left) hide)
     )
   )
-  (global_label "WRITE" (shape input) (at 191.8716 105.156 0) (fields_autoplaced)
+  (global_label "Q7" (shape input) (at 191.8716 105.156 0) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify left))
     (uuid 70583ee2-9d04-4e44-9f46-496f3a191b3a)
     (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 200.2202 105.156 0)
@@ -1899,35 +1911,35 @@
       (effects (font (size 1.27 1.27)) (justify right) hide)
     )
   )
-  (global_label "PH0" (shape input) (at 192.0494 87.376 0) (fields_autoplaced)
+  (global_label "FLOPPY_PHASE_0" (shape input) (at 192.0494 87.376 0) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify left))
     (uuid b3e61347-1937-4d42-9900-18c15c716f43)
     (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 198.7652 87.376 0)
       (effects (font (size 1.27 1.27)) (justify left) hide)
     )
   )
-  (global_label "PH1" (shape input) (at 192.0494 89.916 0) (fields_autoplaced)
+  (global_label "FLOPPY_PHASE_1" (shape input) (at 192.0494 89.916 0) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify left))
     (uuid ca4e5438-0b94-4e52-8abb-94699e787336)
     (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 198.7652 89.916 0)
       (effects (font (size 1.27 1.27)) (justify left) hide)
     )
   )
-  (global_label "~{DRIVE_ENABLE_A}" (shape input) (at 192.5828 153.5176 0) (fields_autoplaced)
+  (global_label "~{FLOPPY_DRIVE_ENABLE_A}" (shape input) (at 192.5828 153.5176 0) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify left))
     (uuid ce96333d-0f62-4a9c-bc45-417f4ab8048e)
     (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 199.6615 153.5176 0)
       (effects (font (size 1.27 1.27)) (justify left) hide)
     )
   )
-  (global_label "~{WRITE}" (shape input) (at 191.8208 109.5756 0) (fields_autoplaced)
+  (global_label "~{Q7}" (shape input) (at 191.8208 109.5756 0) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify left))
     (uuid e4625527-fc56-4d42-aec2-b3d6803c25f1)
     (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 200.6532 109.5756 0)
       (effects (font (size 1.27 1.27)) (justify left) hide)
     )
   )
-  (global_label "PH2" (shape input) (at 192.0494 92.456 0) (fields_autoplaced)
+  (global_label "FLOPPY_PHASE_2" (shape input) (at 192.0494 92.456 0) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify left))
     (uuid f2e183bd-e7b7-4a31-b40f-9c9909abb4e5)
     (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 198.7652 92.456 0)
@@ -1966,10 +1978,10 @@
   (symbol (lib_id "74xx:74LS00") (at 178.562 137.922 0) (unit 2)
     (in_bom yes) (on_board yes) (dnp no)
     (uuid 0f23dec9-6cc6-40e7-b5a2-1025e30121e3)
-    (property "Reference" "U5" (at 178.2318 127.4064 0)
+    (property "Reference" "U5" (at 183.642 133.6548 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Value" "CD74ACT00E" (at 178.5537 131.826 0)
+    (property "Value" "CD74ACT00E" (at 182.9816 143.3576 0)
       (effects (font (size 1.27 1.27)))
     )
     (property "Footprint" "Package_DIP:DIP-14_W7.62mm" (at 178.562 137.922 0)
@@ -2249,10 +2261,10 @@
   (symbol (lib_id "74xx:74LS00") (at 179.324 153.5176 0) (unit 3)
     (in_bom yes) (on_board yes) (dnp no)
     (uuid 72e4547e-795f-46b9-9301-1cb469ed329e)
-    (property "Reference" "U5" (at 178.689 143.1036 0)
+    (property "Reference" "U5" (at 184.2008 149.4028 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Value" "CD74ACT00E" (at 178.9938 137.5156 0)
+    (property "Value" "CD74ACT00E" (at 185.9788 158.6992 0)
       (effects (font (size 1.27 1.27)))
     )
     (property "Footprint" "Package_DIP:DIP-14_W7.62mm" (at 179.324 153.5176 0)
@@ -2472,12 +2484,12 @@
   )
 
   (symbol (lib_id "74xx:74LS02") (at 181.6608 109.5756 0) (unit 4)
-    (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced)
+    (in_bom yes) (on_board yes) (dnp no)
     (uuid d8fb8af2-6f4c-4bfb-baef-57cb786df0ae)
-    (property "Reference" "U18" (at 181.6608 100.6856 0)
+    (property "Reference" "U18" (at 186.6392 106.3752 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Value" "CD74ACT02E" (at 181.6608 103.2256 0)
+    (property "Value" "CD74ACT02E" (at 185.3184 115.5192 0)
       (effects (font (size 1.27 1.27)))
     )
     (property "Footprint" "Package_DIP:DIP-14_W7.62mm" (at 181.6608 109.5756 0)

firmware.kicad_sch

@@ -2,7 +2,14 @@
 
   (uuid d026f307-b57e-4aed-9ed5-753017007742)
 
-  (paper "A4")
+  (paper "A5")
+
+  (title_block
+    (title "MicroSci Floppy Controller (firmware)")
+    (date "2023-08-25")
+    (rev "0.3")
+    (company "RyuCats")
+  )
 
   (lib_symbols
     (symbol "Device:R_Small_US" (pin_numbers hide) (pin_names (offset 0.254) hide) (in_bom yes) (on_board yes)
@@ -376,339 +383,341 @@
     )
   )
 
-  (junction (at 147.955 90.1192) (diameter 0) (color 0 0 0 0)
+  (junction (at 82.0166 61.6204) (diameter 0) (color 0 0 0 0)
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     (uuid e65c9630-d5ad-4e36-912a-12e00d3ba318)
-    (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 192.0753 85.0392 0)
+    (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 126.1369 56.5404 0)
       (effects (font (size 1.27 1.27)) (justify left) hide)
     )
   )
-  (global_label "A7" (shape input) (at 162.56 85.0392 180) (fields_autoplaced)
+  (global_label "A7" (shape input) (at 96.6216 56.5404 180) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify right))
     (uuid f1d63f07-76c0-42cb-9a47-4e48bc10b976)
-    (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 157.3561 85.0392 0)
+    (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 91.4177 56.5404 0)
       (effects (font (size 1.27 1.27)) (justify right) hide)
     )
   )
-  (global_label "A6" (shape input) (at 162.56 82.4992 180) (fields_autoplaced)
+  (global_label "A6" (shape input) (at 96.6216 54.0004 180) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify right))
     (uuid f3f8bbba-6ef8-49c7-ac68-b86eebee4e4e)
-    (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 157.3561 82.4992 0)
+    (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 91.4177 54.0004 0)
       (effects (font (size 1.27 1.27)) (justify right) hide)
     )
   )
-  (global_label "D1" (shape input) (at 186.69 69.7992 0) (fields_autoplaced)
+  (global_label "D1" (shape input) (at 120.7516 41.3004 0) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify left))
     (uuid f8b4192b-c24b-4aa9-9b0d-10353366e669)
-    (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 192.0753 69.7992 0)
+    (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 126.1369 41.3004 0)
       (effects (font (size 1.27 1.27)) (justify left) hide)
     )
   )
 
-  (symbol (lib_id "Device:R_Small_US") (at 147.955 81.9912 0) (unit 1)
+  (symbol (lib_id "Device:R_Small_US") (at 82.0166 53.4924 0) (unit 1)
     (in_bom yes) (on_board yes) (dnp no)
     (uuid 275a6d9f-2e5c-486b-b35d-5ba9112ad7ba)
-    (property "Reference" "R9" (at 143.764 81.1022 0)
+    (property "Reference" "R9" (at 77.8256 52.6034 0)
       (effects (font (size 1.27 1.27)) (justify left))
     )
-    (property "Value" "1k" (at 143.764 83.6422 0)
+    (property "Value" "1k" (at 77.8256 55.1434 0)
       (effects (font (size 1.27 1.27)) (justify left))
     )
-    (property "Footprint" "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal" (at 147.955 81.9912 0)
+    (property "Footprint" "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal" (at 82.0166 53.4924 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "~" (at 147.955 81.9912 0)
+    (property "Datasheet" "~" (at 82.0166 53.4924 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid 56bc5eba-9994-4f6b-9610-19a4587805db))
@@ -728,19 +737,19 @@
     )
   )
 
-  (symbol (lib_id "Memory_EPROM:27C256") (at 174.498 90.1192 0) (unit 1)
+  (symbol (lib_id "Memory_EPROM:27C256") (at 108.5596 61.6204 0) (unit 1)
     (in_bom yes) (on_board yes) (dnp no)
     (uuid 28ef976b-0a25-4739-ac9c-cff60a6fb6ca)
-    (property "Reference" "U16" (at 175.768 60.198 0)
+    (property "Reference" "U16" (at 109.8296 31.6992 0)
       (effects (font (size 1.27 1.27)) (justify left))
     )
-    (property "Value" "Firmware" (at 175.4632 62.6364 0)
+    (property "Value" "Firmware" (at 109.5248 34.1376 0)
       (effects (font (size 1.27 1.27)) (justify left))
     )
-    (property "Footprint" "Package_DIP:DIP-28_W15.24mm" (at 174.498 90.1192 0)
+    (property "Footprint" "Package_DIP:DIP-28_W15.24mm" (at 108.5596 61.6204 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "http://ww1.microchip.com/downloads/en/DeviceDoc/doc0014.pdf" (at 174.498 90.1192 0)
+    (property "Datasheet" "http://ww1.microchip.com/downloads/en/DeviceDoc/doc0014.pdf" (at 108.5596 61.6204 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid 9a544e0f-6379-4926-938f-338426d7263e))
@@ -786,19 +795,19 @@
     )
   )
 
-  (symbol (lib_id "power:GND") (at 150.5204 114.7572 0) (unit 1)
+  (symbol (lib_id "power:GND") (at 84.582 86.2584 0) (unit 1)
     (in_bom yes) (on_board yes) (dnp no)
     (uuid 3fdb6dc0-003c-4189-9058-54f509de5e32)
-    (property "Reference" "#PWR032" (at 150.5204 121.1072 0)
+    (property "Reference" "#PWR032" (at 84.582 92.6084 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "GND" (at 150.4696 118.7196 0)
+    (property "Value" "GND" (at 84.5312 90.2208 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Footprint" "" (at 150.5204 114.7572 0)
+    (property "Footprint" "" (at 84.582 86.2584 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (at 150.5204 114.7572 0)
+    (property "Datasheet" "" (at 84.582 86.2584 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid a5fe7fbb-119c-4b3f-b66b-1b50b8c446ad))
@@ -817,19 +826,19 @@
     )
   )
 
-  (symbol (lib_id "power:+5V") (at 157.988 93.6752 0) (unit 1)
+  (symbol (lib_id "power:+5V") (at 92.0496 65.1764 0) (unit 1)
     (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced)
     (uuid 42542efc-836a-4f14-9b2a-3c8eff5062d9)
-    (property "Reference" "#PWR048" (at 157.988 97.4852 0)
+    (property "Reference" "#PWR048" (at 92.0496 68.9864 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "+5V" (at 157.988 89.6112 0)
+    (property "Value" "+5V" (at 92.0496 61.1124 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Footprint" "" (at 157.988 93.6752 0)
+    (property "Footprint" "" (at 92.0496 65.1764 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (at 157.988 93.6752 0)
+    (property "Datasheet" "" (at 92.0496 65.1764 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid aaf23d7f-b02d-47ae-bd41-0f943084a14d))
@@ -853,19 +862,19 @@
     )
   )
 
-  (symbol (lib_id "Switch:SW_DIP_x02") (at 132.334 87.5792 180) (unit 1)
+  (symbol (lib_id "Switch:SW_DIP_x02") (at 66.3956 59.0804 180) (unit 1)
     (in_bom yes) (on_board yes) (dnp no)
     (uuid 4ef7cf6c-549d-45e6-a72d-1b03701a595c)
-    (property "Reference" "J4" (at 133.5532 93.726 0)
+    (property "Reference" "J4" (at 67.6148 65.2272 0)
       (effects (font (size 1.27 1.27)) (justify left))
     )
-    (property "Value" "ROM Select" (at 137.7188 83.312 0)
+    (property "Value" "ROM Select" (at 71.7804 54.8132 0)
       (effects (font (size 1.27 1.27)) (justify left))
     )
-    (property "Footprint" "Button_Switch_THT:SW_DIP_SPSTx02_Slide_9.78x7.26mm_W7.62mm_P2.54mm" (at 132.334 87.5792 0)
+    (property "Footprint" "Button_Switch_THT:SW_DIP_SPSTx02_Slide_9.78x7.26mm_W7.62mm_P2.54mm" (at 66.3956 59.0804 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "~" (at 132.334 87.5792 0)
+    (property "Datasheet" "~" (at 66.3956 59.0804 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid 3df7357f-5d9c-40ea-a740-9fc3321aeb01))
@@ -887,19 +896,19 @@
     )
   )
 
-  (symbol (lib_id "power:GND") (at 161.798 96.9264 0) (unit 1)
+  (symbol (lib_id "power:GND") (at 95.8596 68.4276 0) (unit 1)
     (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced)
     (uuid 5951a249-6ed5-4920-837f-e7ce54aba897)
-    (property "Reference" "#PWR053" (at 161.798 103.2764 0)
+    (property "Reference" "#PWR053" (at 95.8596 74.7776 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "GND" (at 161.798 101.4984 0)
+    (property "Value" "GND" (at 95.8596 72.9996 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Footprint" "" (at 161.798 96.9264 0)
+    (property "Footprint" "" (at 95.8596 68.4276 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (at 161.798 96.9264 0)
+    (property "Datasheet" "" (at 95.8596 68.4276 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid 43fbac4d-a8fd-4fd1-b52e-04c1e4657c05))
@@ -918,19 +927,19 @@
     )
   )
 
-  (symbol (lib_id "power:+5V") (at 147.955 77.9272 0) (unit 1)
+  (symbol (lib_id "power:+5V") (at 82.0166 49.4284 0) (unit 1)
     (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced)
     (uuid 89f5a644-b244-4f75-94a6-690008b021ab)
-    (property "Reference" "#PWR028" (at 147.955 81.7372 0)
+    (property "Reference" "#PWR028" (at 82.0166 53.2384 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "+5V" (at 147.955 72.7202 0)
+    (property "Value" "+5V" (at 82.0166 44.2214 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Footprint" "" (at 147.955 77.9272 0)
+    (property "Footprint" "" (at 82.0166 49.4284 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (at 147.955 77.9272 0)
+    (property "Datasheet" "" (at 82.0166 49.4284 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid 4d5b5999-45ee-4daf-94ea-85f600dc74a6))
@@ -954,19 +963,19 @@
     )
   )
 
-  (symbol (lib_id "power:GND") (at 174.498 119.4562 0) (unit 1)
+  (symbol (lib_id "power:GND") (at 108.5596 90.9574 0) (unit 1)
     (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced)
     (uuid 9cd7611a-7a95-44bc-9ce1-cef872734c93)
-    (property "Reference" "#PWR055" (at 174.498 125.8062 0)
+    (property "Reference" "#PWR055" (at 108.5596 97.3074 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "GND" (at 174.498 124.0282 0)
+    (property "Value" "GND" (at 108.5596 95.5294 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Footprint" "" (at 174.498 119.4562 0)
+    (property "Footprint" "" (at 108.5596 90.9574 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (at 174.498 119.4562 0)
+    (property "Datasheet" "" (at 108.5596 90.9574 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid 6e3d3884-8cfd-48b5-a850-0eb3c6e1925f))
@@ -985,19 +994,19 @@
     )
   )
 
-  (symbol (lib_id "power:+5V") (at 174.498 60.5282 0) (unit 1)
+  (symbol (lib_id "power:+5V") (at 108.5596 32.0294 0) (unit 1)
     (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced)
     (uuid b767722e-2dbc-4581-b0f3-1bb40cb93237)
-    (property "Reference" "#PWR052" (at 174.498 64.3382 0)
+    (property "Reference" "#PWR052" (at 108.5596 35.8394 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "+5V" (at 174.498 56.4642 0)
+    (property "Value" "+5V" (at 108.5596 27.9654 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Footprint" "" (at 174.498 60.5282 0)
+    (property "Footprint" "" (at 108.5596 32.0294 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (at 174.498 60.5282 0)
+    (property "Datasheet" "" (at 108.5596 32.0294 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid d6200b82-bca5-4773-9501-07471e542ab0))
@@ -1021,19 +1030,19 @@
     )
   )
 
-  (symbol (lib_id "power:+5V") (at 152.527 77.8002 0) (unit 1)
+  (symbol (lib_id "power:+5V") (at 86.5886 49.3014 0) (unit 1)
     (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced)
     (uuid bc7168fb-87ce-411c-976a-01df40b901e2)
-    (property "Reference" "#PWR027" (at 152.527 81.6102 0)
+    (property "Reference" "#PWR027" (at 86.5886 53.1114 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "+5V" (at 152.527 72.5932 0)
+    (property "Value" "+5V" (at 86.5886 44.0944 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Footprint" "" (at 152.527 77.8002 0)
+    (property "Footprint" "" (at 86.5886 49.3014 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (at 152.527 77.8002 0)
+    (property "Datasheet" "" (at 86.5886 49.3014 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid 7e75a969-7e7c-4205-911c-f6631807e32c))
@@ -1057,19 +1066,19 @@
     )
   )
 
-  (symbol (lib_id "power:GND") (at 123.2408 92.5576 0) (unit 1)
+  (symbol (lib_id "power:GND") (at 57.3024 64.0588 0) (unit 1)
     (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced)
     (uuid cca7be5b-44d8-4ce6-acb6-22e25de816ed)
-    (property "Reference" "#PWR029" (at 123.2408 98.9076 0)
+    (property "Reference" "#PWR029" (at 57.3024 70.4088 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "GND" (at 123.2408 96.8756 0)
+    (property "Value" "GND" (at 57.3024 68.3768 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Footprint" "" (at 123.2408 92.5576 0)
+    (property "Footprint" "" (at 57.3024 64.0588 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (at 123.2408 92.5576 0)
+    (property "Datasheet" "" (at 57.3024 64.0588 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid ff5d291b-bc73-4c38-b2bd-624dff9a0f58))
@@ -1088,19 +1097,19 @@
     )
   )
 
-  (symbol (lib_id "Device:R_Small_US") (at 152.527 81.9912 0) (unit 1)
+  (symbol (lib_id "Device:R_Small_US") (at 86.5886 53.4924 0) (unit 1)
     (in_bom yes) (on_board yes) (dnp no)
     (uuid e5189c99-41b0-4f2c-af35-9a8f5ce95699)
-    (property "Reference" "R10" (at 153.924 80.9752 0)
+    (property "Reference" "R10" (at 87.9856 52.4764 0)
       (effects (font (size 1.27 1.27)) (justify left))
     )
-    (property "Value" "1k" (at 153.924 83.5152 0)
+    (property "Value" "1k" (at 87.9856 55.0164 0)
       (effects (font (size 1.27 1.27)) (justify left))
     )
-    (property "Footprint" "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal" (at 152.527 81.9912 0)
+    (property "Footprint" "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal" (at 86.5886 53.4924 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "~" (at 152.527 81.9912 0)
+    (property "Datasheet" "~" (at 86.5886 53.4924 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid c1e93063-4f67-421e-a413-d85f596c7323))

floppies.kicad_sch

@@ -4,6 +4,13 @@
 
   (paper "A4")
 
+  (title_block
+    (title "MicroSci Floppy Controller (floppy drive connectors)")
+    (date "2023-08-25")
+    (rev "0.3")
+    (company "RyuCats")
+  )
+
   (lib_symbols
     (symbol "74xx:74LS05" (pin_names (offset 1.016)) (in_bom yes) (on_board yes)
       (property "Reference" "U" (at 0 1.27 0)
@@ -167,6 +174,120 @@
         )
       )
     )
+    (symbol "74xx:74LS109" (pin_names (offset 1.016)) (in_bom yes) (on_board yes)
+      (property "Reference" "U" (at -7.62 8.89 0)
+        (effects (font (size 1.27 1.27)))
+      )
+      (property "Value" "74LS109" (at -7.62 -8.89 0)
+        (effects (font (size 1.27 1.27)))
+      )
+      (property "Footprint" "" (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "Datasheet" "http://www.ti.com/lit/gpn/sn74LS109" (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "ki_locked" "" (at 0 0 0)
+        (effects (font (size 1.27 1.27)))
+      )
+      (property "ki_keywords" "TTL JK" (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "ki_description" "Dual JK Flip-Flop, Set & Reset" (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "ki_fp_filters" "DIP*W7.62mm*" (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (symbol "74LS109_1_0"
+        (pin input line (at 0 -7.62 90) (length 2.54)
+          (name "~{R}" (effects (font (size 1.27 1.27))))
+          (number "1" (effects (font (size 1.27 1.27))))
+        )
+        (pin input line (at -7.62 2.54 0) (length 2.54)
+          (name "J" (effects (font (size 1.27 1.27))))
+          (number "2" (effects (font (size 1.27 1.27))))
+        )
+        (pin input line (at -7.62 -2.54 0) (length 2.54)
+          (name "~{K}" (effects (font (size 1.27 1.27))))
+          (number "3" (effects (font (size 1.27 1.27))))
+        )
+        (pin input clock (at -7.62 0 0) (length 2.54)
+          (name "C" (effects (font (size 1.27 1.27))))
+          (number "4" (effects (font (size 1.27 1.27))))
+        )
+        (pin input line (at 0 7.62 270) (length 2.54)
+          (name "~{S}" (effects (font (size 1.27 1.27))))
+          (number "5" (effects (font (size 1.27 1.27))))
+        )
+        (pin output line (at 7.62 2.54 180) (length 2.54)
+          (name "Q" (effects (font (size 1.27 1.27))))
+          (number "6" (effects (font (size 1.27 1.27))))
+        )
+        (pin output line (at 7.62 -2.54 180) (length 2.54)
+          (name "~{Q}" (effects (font (size 1.27 1.27))))
+          (number "7" (effects (font (size 1.27 1.27))))
+        )
+      )
+      (symbol "74LS109_1_1"
+        (rectangle (start -5.08 5.08) (end 5.08 -5.08)
+          (stroke (width 0.254) (type default))
+          (fill (type background))
+        )
+      )
+      (symbol "74LS109_2_0"
+        (pin output line (at 7.62 2.54 180) (length 2.54)
+          (name "Q" (effects (font (size 1.27 1.27))))
+          (number "10" (effects (font (size 1.27 1.27))))
+        )
+        (pin input line (at 0 7.62 270) (length 2.54)
+          (name "~{S}" (effects (font (size 1.27 1.27))))
+          (number "11" (effects (font (size 1.27 1.27))))
+        )
+        (pin input clock (at -7.62 0 0) (length 2.54)
+          (name "C" (effects (font (size 1.27 1.27))))
+          (number "12" (effects (font (size 1.27 1.27))))
+        )
+        (pin input line (at -7.62 -2.54 0) (length 2.54)
+          (name "~{K}" (effects (font (size 1.27 1.27))))
+          (number "13" (effects (font (size 1.27 1.27))))
+        )
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+          (number "15" (effects (font (size 1.27 1.27))))
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+        (rectangle (start -5.08 5.08) (end 5.08 -5.08)
+          (stroke (width 0.254) (type default))
+          (fill (type background))
+        )
+      )
+      (symbol "74LS109_3_0"
+        (pin power_in line (at 0 10.16 270) (length 2.54)
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+          (number "16" (effects (font (size 1.27 1.27))))
+        )
+        (pin power_in line (at 0 -10.16 90) (length 2.54)
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+          (number "8" (effects (font (size 1.27 1.27))))
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+      (symbol "74LS109_3_1"
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+          (fill (type background))
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     (symbol "74xx:74LS14" (pin_names (offset 1.016)) (in_bom yes) (on_board yes)
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@@ -953,30 +1074,39 @@
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@@ -984,6 +1114,8 @@
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@@ -1008,6 +1140,10 @@
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@@ -1020,6 +1156,18 @@
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@@ -1052,6 +1200,10 @@
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+    (uuid 2c30de8e-f83c-43f0-bf09-b08fe1408730)
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@@ -1072,7 +1224,7 @@
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-  (wire (pts (xy 155.3464 107.7468) (xy 155.3464 71.628))
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@@ -1080,6 +1232,14 @@
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   )
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+    (stroke (width 0) (type default))
+    (uuid 46d05d41-f912-4006-9254-68cd6eba7be2)
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+    (stroke (width 0) (type default))
+    (uuid 4884daa8-6a99-47a8-9fc3-2eef473b4ac4)
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@@ -1088,6 +1248,10 @@
     (stroke (width 0) (type default))
     (uuid 4d55c4e8-ccba-4648-a72a-316ff64470e4)
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+  (wire (pts (xy 224.282 115.7224) (xy 224.282 127.7112))
+    (stroke (width 0) (type default))
+    (uuid 4e30d768-7239-4207-b22f-facca2798416)
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@@ -1096,6 +1260,10 @@
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+    (uuid 5c3c0596-4600-4f07-ac37-354079b44b20)
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@@ -1124,11 +1292,15 @@
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     (uuid 6cbc715f-a743-4614-82f5-90da98f21804)
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+    (uuid 6ec8bf83-933d-4053-9284-3f1332db6d80)
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@@ -1140,11 +1312,11 @@
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@@ -1164,7 +1336,7 @@
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@@ -1176,6 +1348,10 @@
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+    (uuid 8a49dc16-824f-4fc2-8dfb-9308f5ca6d55)
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@@ -1188,7 +1364,7 @@
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-  (wire (pts (xy 134.3152 54.9656) (xy 136.398 54.9656))
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@@ -1200,6 +1376,14 @@
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     (uuid 9fcf34d9-a363-4cfa-818c-ac0cb8c285a8)
   )
+  (wire (pts (xy 238.1504 116.84) (xy 238.1504 119.8372))
+    (stroke (width 0) (type default))
+    (uuid a301379d-9614-4353-aa54-9cf0aab6210a)
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+  (wire (pts (xy 224.282 91.2368) (xy 224.282 92.5576))
+    (stroke (width 0) (type default))
+    (uuid a3cf38ae-f923-4208-9647-54b745350b47)
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@@ -1208,6 +1392,10 @@
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+  (wire (pts (xy 256.1336 104.1908) (xy 231.902 104.1908))
+    (stroke (width 0) (type default))
+    (uuid ad61cb34-9bd3-45a2-929f-dbe9c9de128b)
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@@ -1224,6 +1412,10 @@
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     (uuid b575fb86-b027-4367-abc8-ba268afa466d)
   )
+  (wire (pts (xy 231.902 108.1024) (xy 258.826 108.1024))
+    (stroke (width 0) (type default))
+    (uuid b666ae3f-da0e-4abc-8f1d-78380286bb24)
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@@ -1232,6 +1424,10 @@
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     (uuid bab18d60-4a4d-4f36-90cc-e95ba75723d0)
   )
+  (wire (pts (xy 151.5364 81.7372) (xy 151.5364 81.788))
+    (stroke (width 0) (type default))
+    (uuid bdf62ba0-23b0-4855-8269-8057e08d4131)
+  )
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@@ -1248,6 +1444,10 @@
     (stroke (width 0) (type default))
     (uuid c2bbeccc-b334-4122-bd2c-f124f68dbb16)
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+  (wire (pts (xy 238.1504 111.4552) (xy 238.1504 111.76))
+    (stroke (width 0) (type default))
+    (uuid c34e94f9-e1fe-497b-812c-49c3efb2ef56)
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@@ -1260,6 +1460,10 @@
     (stroke (width 0) (type default))
     (uuid c7c14d9f-d06f-4818-bdf7-8177f5216476)
   )
+  (wire (pts (xy 151.5872 81.7372) (xy 151.5872 105.5624))
+    (stroke (width 0) (type default))
+    (uuid c85e55ed-9020-4a48-9b65-3bfc89b21619)
+  )
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@@ -1268,10 +1472,18 @@
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+  (wire (pts (xy 258.8768 104.1908) (xy 256.1336 104.1908))
+    (stroke (width 0) (type default))
+    (uuid cd46210b-1acf-4911-a700-034a55725e81)
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+  (wire (pts (xy 231.902 104.1908) (xy 231.902 105.5624))
+    (stroke (width 0) (type default))
+    (uuid d3148091-cb95-4905-837d-51ae534325bf)
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@@ -1288,6 +1500,10 @@
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+  (wire (pts (xy 235.5088 110.6424) (xy 231.902 110.6424))
+    (stroke (width 0) (type default))
+    (uuid d98fe120-0609-4ac1-8997-02188139269e)
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@@ -1300,6 +1516,10 @@
     (stroke (width 0) (type default))
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   )
+  (wire (pts (xy 232.6132 127.7112) (xy 232.6132 126.4412))
+    (stroke (width 0) (type default))
+    (uuid e22ab6bf-c231-41ff-8abe-a86bba1faf62)
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@@ -1312,20 +1532,24 @@
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+  (wire (pts (xy 256.1336 104.1908) (xy 256.0828 119.8372))
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-  (wire (pts (xy 155.3464 107.7468) (xy 155.3464 127.6096))
+  (wire (pts (xy 230.886 127.7112) (xy 232.6132 127.7112))
     (stroke (width 0) (type default))
-    (uuid fdffd157-70ee-40db-b665-cc979d306b6d)
+    (uuid f8906298-8478-418a-b75a-bee57bedef36)
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-  (text "Open-collector, switches +12VDC in floppy drive" (at 190.5 113.0808 0)
+  (text "Open-collector, switches +12VDC in floppy drive" (at 185.674 155.3464 0)
     (effects (font (size 1.27 1.27)) (justify right bottom))
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@@ -1334,119 +1558,119 @@
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+  (global_label "~{FLOPPY_DRIVE_ENABLE_B}" (shape input) (at 163.3728 132.6896 0) (fields_autoplaced)
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     (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 170.6329 132.6896 0)
       (effects (font (size 1.27 1.27)) (justify left) hide)
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-  (global_label "PWM" (shape input) (at 163.1696 84.328 0) (fields_autoplaced)
+  (global_label "FLOPPY_WRITE_PROTECT" (shape input) (at 163.1696 84.328 0) (fields_autoplaced)
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     (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 170.2482 84.328 0)
       (effects (font (size 1.27 1.27)) (justify left) hide)
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   )
-  (global_label "PWM" (shape input) (at 163.3728 140.3096 0) (fields_autoplaced)
+  (global_label "FLOPPY_WRITE_PROTECT" (shape input) (at 163.3728 140.3096 0) (fields_autoplaced)
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     (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 170.4514 140.3096 0)
       (effects (font (size 1.27 1.27)) (justify left) hide)
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   )
-  (global_label "PH2" (shape input) (at 163.1696 66.548 0) (fields_autoplaced)
+  (global_label "FLOPPY_PHASE_2" (shape input) (at 163.1696 66.548 0) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify left))
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     (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 169.8854 66.548 0)
       (effects (font (size 1.27 1.27)) (justify left) hide)
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-  (global_label "PH0" (shape input) (at 163.3728 117.4496 0) (fields_autoplaced)
+  (global_label "FLOPPY_PHASE_0" (shape input) (at 163.3728 117.4496 0) (fields_autoplaced)
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+  (global_label "SR7" (shape input) (at 258.8768 104.1908 0) (fields_autoplaced)
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+  (global_label "~{FLOPPY_DRIVE_ENABLE_B}" (shape input) (at 163.068 54.9656 0) (fields_autoplaced)
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+  (global_label "~{WRITE_CLOCKED_DATA}" (shape input) (at 258.826 108.1024 0) (fields_autoplaced)
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+  (global_label "FLOPPY_PHASE_2" (shape input) (at 163.3728 122.5296 0) (fields_autoplaced)
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-  (global_label "PH3" (shape input) (at 163.3728 125.0696 0) (fields_autoplaced)
+  (global_label "FLOPPY_PHASE_3" (shape input) (at 163.3728 125.0696 0) (fields_autoplaced)
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+  (global_label "FLOPPY_PHASE_0" (shape input) (at 163.1696 61.468 0) (fields_autoplaced)
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-  (global_label "~{DRIVE_ENABLE_A}" (shape input) (at 163.1696 76.708 0) (fields_autoplaced)
+  (global_label "~{FLOPPY_DRIVE_ENABLE_A}" (shape input) (at 163.1696 76.708 0) (fields_autoplaced)
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-  (global_label "PH1" (shape input) (at 163.3728 119.9896 0) (fields_autoplaced)
+  (global_label "FLOPPY_PHASE_1" (shape input) (at 163.3728 119.9896 0) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify left))
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-  (global_label "BR_DATA" (shape input) (at 195.5292 96.8248 0) (fields_autoplaced)
+  (global_label "FLOPPY_READ_DATA" (shape input) (at 195.5292 96.8248 0) (fields_autoplaced)
     (effects (font (size 1.27 1.27)) (justify left))
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-  (global_label "PH1" (shape input) (at 163.1696 64.008 0) (fields_autoplaced)
+  (global_label "FLOPPY_PHASE_1" (shape input) (at 163.1696 64.008 0) (fields_autoplaced)
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     (uuid fcaf1d5c-85eb-414c-918a-682cb31cccc8)
     (property "Intersheetrefs" "${INTERSHEET_REFS}" (at 169.8854 64.008 0)
@@ -1554,19 +1778,19 @@
     )
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-  (symbol (lib_id "74xx:74LS05") (at 167.0812 107.7468 0) (mirror y) (unit 6)
-    (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced)
+  (symbol (lib_id "74xx:74LS05") (at 167.0812 111.76 0) (mirror y) (unit 6)
+    (in_bom yes) (on_board yes) (dnp no)
     (uuid 1a6fe521-99eb-4fbb-97f3-659b4c27a822)
-    (property "Reference" "U6" (at 167.0812 98.6028 0)
+    (property "Reference" "U6" (at 165.2016 107.6452 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Value" "CD74ACT05E" (at 167.0812 101.1428 0)
+    (property "Value" "CD74ACT05E" (at 177.6476 107.7468 0)
       (effects (font (size 1.27 1.27)))
     )
-    (property "Footprint" "Package_DIP:DIP-14_W7.62mm" (at 167.0812 107.7468 0)
+    (property "Footprint" "Package_DIP:DIP-14_W7.62mm" (at 167.0812 111.76 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "http://www.ti.com/lit/gpn/sn74LS05" (at 167.0812 107.7468 0)
+    (property "Datasheet" "http://www.ti.com/lit/gpn/sn74LS05" (at 167.0812 111.76 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid d4eb9bc4-343a-452e-8fa8-c1ba2f659567))
@@ -1598,6 +1822,80 @@
     )
   )
 
+  (symbol (lib_id "74xx:74LS05") (at 246.6848 119.8372 0) (mirror y) (unit 4)
+    (in_bom yes) (on_board yes) (dnp no)
+    (uuid 1f03e0bd-366c-40b6-9aaf-200ec87c413e)
+    (property "Reference" "U6" (at 253.0348 123.3932 0)
+      (effects (font (size 1.27 1.27)))
+    )
+    (property "Value" "CD74ACT05E" (at 249.8852 127.3048 0)
+      (effects (font (size 1.27 1.27)))
+    )
+    (property "Footprint" "Package_DIP:DIP-14_W7.62mm" (at 246.6848 119.8372 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "http://www.ti.com/lit/gpn/sn74LS05" (at 246.6848 119.8372 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid 048df26a-17ce-4d37-ae4f-a0b76d561796))
+    (pin "2" (uuid 0c2fe5f3-e91c-4531-9fb6-10174f47e980))
+    (pin "3" (uuid ed0fa653-6fe3-4c52-8392-0cfd65360d94))
+    (pin "4" (uuid 436a9d7a-dc14-4cf2-8b0b-2cd9899bc7d8))
+    (pin "5" (uuid 1c3245d7-55e8-4b87-b0bf-347f529e9577))
+    (pin "6" (uuid 03f6ea9f-3805-492b-9062-600ce43621bb))
+    (pin "8" (uuid 4c1d0c7a-f176-4f2f-bad3-984615818f06))
+    (pin "9" (uuid fa397756-22b2-45e5-a7bf-c6298f10a541))
+    (pin "10" (uuid f10a4a78-c79b-4ca5-b874-28b9afa3fd5a))
+    (pin "11" (uuid 74cae2d4-cac8-4d2b-8e35-3ef954a2d496))
+    (pin "12" (uuid 34ca29ea-677f-43ae-bcf3-4e95efc49858))
+    (pin "13" (uuid b772d177-4294-428a-91f1-c256bb37267f))
+    (pin "14" (uuid cf1f7840-e557-44a9-84d5-af6dd8a7f181))
+    (pin "7" (uuid 6812eacc-bf69-41f3-bc6e-16b044b8a0b5))
+    (instances
+      (project "MicroSci Floppy Controller"
+        (path "/56eaaa0c-e1fe-4237-9a20-09a5d3261c04"
+          (reference "U6") (unit 4)
+        )
+        (path "/56eaaa0c-e1fe-4237-9a20-09a5d3261c04/115616a6-af28-445c-90be-c24fb7c086f6"
+          (reference "U6") (unit 4)
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+      )
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+  )
+
+  (symbol (lib_id "power:+5V") (at 238.1504 111.4552 0) (mirror y) (unit 1)
+    (in_bom yes) (on_board yes) (dnp no)
+    (uuid 64b31225-41c7-4c3a-af34-78a232e230a3)
+    (property "Reference" "#PWR08" (at 238.1504 115.2652 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Value" "+5V" (at 240.9952 109.1692 0)
+      (effects (font (size 1.27 1.27)))
+    )
+    (property "Footprint" "" (at 238.1504 111.4552 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "" (at 238.1504 111.4552 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid 3525daeb-dc31-4898-be37-8b5216bbea37))
+    (instances
+      (project "MicroSci Floppy Controller"
+        (path "/56eaaa0c-e1fe-4237-9a20-09a5d3261c04"
+          (reference "#PWR08") (unit 1)
+        )
+        (path "/56eaaa0c-e1fe-4237-9a20-09a5d3261c04/115616a6-af28-445c-90be-c24fb7c086f6"
+          (reference "#PWR035") (unit 1)
+        )
+      )
+      (project "Sequential Systems Q-Print"
+        (path "/e47a908d-c0bd-488e-86ea-1ad4da6f58aa"
+          (reference "#PWR09") (unit 1)
+        )
+      )
+    )
+  )
+
   (symbol (lib_id "Connector_Generic:Conn_02x10_Odd_Even") (at 138.3284 71.628 0) (unit 1)
     (in_bom yes) (on_board yes) (dnp no)
     (uuid 6f9d28ac-b9fc-48fc-943c-84c7e271109a)
@@ -1649,12 +1947,12 @@
   )
 
   (symbol (lib_id "Device:R_Small_US") (at 159.766 92.3544 0) (unit 1)
-    (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced)
+    (in_bom yes) (on_board yes) (dnp no)
     (uuid 72d59120-e58b-4644-b8ba-dddf548cb3c3)
-    (property "Reference" "R3" (at 162.433 91.0844 0)
+    (property "Reference" "R3" (at 156.21 90.17 0)
       (effects (font (size 1.27 1.27)) (justify left))
     )
-    (property "Value" "680" (at 162.433 93.6244 0)
+    (property "Value" "680" (at 161.29 91.7448 0)
       (effects (font (size 1.27 1.27)) (justify left))
     )
     (property "Footprint" "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal" (at 159.766 92.3544 0)
@@ -1731,12 +2029,12 @@
   )
 
   (symbol (lib_id "74xx:74LS14") (at 168.7068 96.8248 0) (unit 6)
-    (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced)
+    (in_bom yes) (on_board yes) (dnp no)
     (uuid 8fb5576f-6f7c-4920-af35-3e1a2691a2fa)
-    (property "Reference" "U3" (at 167.4368 91.1098 90)
+    (property "Reference" "U3" (at 166.8272 92.456 0)
       (effects (font (size 1.27 1.27)) (justify left))
     )
-    (property "Value" "CD74ACT14E" (at 169.9768 91.1098 90)
+    (property "Value" "CD74ACT14E" (at 166.2176 100.4316 0)
       (effects (font (size 1.27 1.27)) (justify left))
     )
     (property "Footprint" "Package_DIP:DIP-14_W7.62mm" (at 168.7068 96.8248 0)
@@ -1780,7 +2078,7 @@
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       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "+5V" (at 162.433 86.1314 0)
+    (property "Value" "+5V" (at 161.0868 85.9028 0)
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     (property "Footprint" "" (at 159.766 89.0524 0)
@@ -1842,7 +2140,7 @@
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       (effects (font (size 1.27 1.27)) (justify left))
     )
-    (property "Value" "470" (at 129.54 53.6956 90)
+    (property "Value" "470" (at 133.5532 51.9684 90)
       (effects (font (size 1.27 1.27)) (justify left))
     )
     (property "Footprint" "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal" (at 131.7752 54.9656 0)
@@ -1900,12 +2198,12 @@
   )
 
   (symbol (lib_id "74xx:74LS14") (at 185.2168 96.8248 0) (unit 4)
-    (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced)
+    (in_bom yes) (on_board yes) (dnp no)
     (uuid ab3f472c-3026-4267-964d-62e75ac2c2c5)
-    (property "Reference" "U3" (at 183.9468 91.1098 90)
+    (property "Reference" "U3" (at 183.9468 92.5068 0)
       (effects (font (size 1.27 1.27)) (justify left))
     )
-    (property "Value" "CD74ACT14E" (at 186.4868 91.1098 90)
+    (property "Value" "CD74ACT14E" (at 183.7436 100.584 0)
       (effects (font (size 1.27 1.27)) (justify left))
     )
     (property "Footprint" "Package_DIP:DIP-14_W7.62mm" (at 185.2168 96.8248 0)
@@ -1943,6 +2241,35 @@
     )
   )
 
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+    (in_bom yes) (on_board yes) (dnp no)
+    (uuid ad3e12be-8ad7-4ff1-a6e0-3a7b80b24986)
+    (property "Reference" "R15" (at 230.1748 122.7328 90)
+      (effects (font (size 1.27 1.27)) (justify right))
+    )
+    (property "Value" "4.7k" (at 230.1748 125.2728 90)
+      (effects (font (size 1.27 1.27)) (justify right))
+    )
+    (property "Footprint" "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal" (at 228.346 127.7112 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "~" (at 228.346 127.7112 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid cb6ed61a-6729-4e40-8b8a-632036ab5fc8))
+    (pin "2" (uuid b81dca58-5e0d-4e70-95d8-4159920a01cc))
+    (instances
+      (project "MicroSci Floppy Controller"
+        (path "/56eaaa0c-e1fe-4237-9a20-09a5d3261c04"
+          (reference "R15") (unit 1)
+        )
+        (path "/56eaaa0c-e1fe-4237-9a20-09a5d3261c04/115616a6-af28-445c-90be-c24fb7c086f6"
+          (reference "R15") (unit 1)
+        )
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     (uuid b65dc7e3-ec8a-4766-965d-1862ea5ce3ad)
@@ -1979,6 +2306,34 @@
     )
   )
 
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+    (in_bom yes) (on_board yes) (dnp no)
+    (uuid bd4e066d-ace0-491e-a242-322dd3945806)
+    (property "Reference" "#PWR036" (at 232.6132 130.2512 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Value" "+5V" (at 235.3564 123.3424 0)
+      (effects (font (size 1.27 1.27)))
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+    (property "Footprint" "" (at 232.6132 126.4412 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "" (at 232.6132 126.4412 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid 64fd92ae-7b68-43e1-a0b9-d7c1706d11d0))
+    (instances
+      (project "MicroSci Floppy Controller"
+        (path "/56eaaa0c-e1fe-4237-9a20-09a5d3261c04"
+          (reference "#PWR036") (unit 1)
+        )
+        (path "/56eaaa0c-e1fe-4237-9a20-09a5d3261c04/115616a6-af28-445c-90be-c24fb7c086f6"
+          (reference "#PWR036") (unit 1)
+        )
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+
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     (uuid c7acc289-e5d1-4753-bd56-1fd56657fc43)
@@ -2077,6 +2432,63 @@
     )
   )
 
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+    (uuid d9b4510a-69e9-474e-92de-bbca76ecee59)
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+      (effects (font (size 1.27 1.27)) hide)
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+    (property "Datasheet" "" (at 224.282 91.2368 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid 7a281ad5-de34-4af4-94a9-72ac8b1ea54f))
+    (instances
+      (project "MicroSci Floppy Controller"
+        (path "/56eaaa0c-e1fe-4237-9a20-09a5d3261c04"
+          (reference "#PWR035") (unit 1)
+        )
+        (path "/56eaaa0c-e1fe-4237-9a20-09a5d3261c04/115616a6-af28-445c-90be-c24fb7c086f6"
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+    )
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@@ -2108,6 +2520,78 @@
     )
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