diff --git a/.gitignore b/.gitignore
index 460fe60..24674ee 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,7 +16,7 @@ _autosave-*
 *-save.pro
 *-save.kicad_pcb
 fp-info-cache
-\#autosaved_files#
+\#auto_saved_files#
 
 # Netlist files (exported from Eeschema)
 *.net
diff --git a/libs b/libs
index 4010bc0..3a701ea 160000
--- a/libs
+++ b/libs
@@ -1 +1 @@
-Subproject commit 4010bc0a3208aba2f6ff7c85ceac6e61b5e1d1cb
+Subproject commit 3a701ea94f0eb7417c8dc791683b58a57ad6d9c5
diff --git a/memory_pgm.kicad_sch b/memory_pgm.kicad_sch
index 8921fd5..1e7afd8 100644
--- a/memory_pgm.kicad_sch
+++ b/memory_pgm.kicad_sch
@@ -7,7 +7,7 @@
   (title_block
     (title "RAM/ROM Board")
     (date "2022-11-15")
-    (rev "1.0.0-dev-4")
+    (rev "1.0.0-dev")
   )
 
   (lib_symbols
@@ -146,6 +146,83 @@
         )
       )
     )
+    (symbol "Device:Q_NPN_BEC" (pin_names (offset 0) hide) (in_bom yes) (on_board yes)
+      (property "Reference" "Q" (id 0) (at 5.08 1.27 0)
+        (effects (font (size 1.27 1.27)) (justify left))
+      )
+      (property "Value" "Q_NPN_BEC" (id 1) (at 5.08 -1.27 0)
+        (effects (font (size 1.27 1.27)) (justify left))
+      )
+      (property "Footprint" "" (id 2) (at 5.08 2.54 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "Datasheet" "~" (id 3) (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "ki_keywords" "transistor NPN" (id 4) (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "ki_description" "NPN transistor, base/emitter/collector" (id 5) (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (symbol "Q_NPN_BEC_0_1"
+        (polyline
+          (pts
+            (xy 0.635 0.635)
+            (xy 2.54 2.54)
+          )
+          (stroke (width 0) (type default) (color 0 0 0 0))
+          (fill (type none))
+        )
+        (polyline
+          (pts
+            (xy 0.635 -0.635)
+            (xy 2.54 -2.54)
+            (xy 2.54 -2.54)
+          )
+          (stroke (width 0) (type default) (color 0 0 0 0))
+          (fill (type none))
+        )
+        (polyline
+          (pts
+            (xy 0.635 1.905)
+            (xy 0.635 -1.905)
+            (xy 0.635 -1.905)
+          )
+          (stroke (width 0.508) (type default) (color 0 0 0 0))
+          (fill (type none))
+        )
+        (polyline
+          (pts
+            (xy 1.27 -1.778)
+            (xy 1.778 -1.27)
+            (xy 2.286 -2.286)
+            (xy 1.27 -1.778)
+            (xy 1.27 -1.778)
+          )
+          (stroke (width 0) (type default) (color 0 0 0 0))
+          (fill (type outline))
+        )
+        (circle (center 1.27 0) (radius 2.8194)
+          (stroke (width 0.254) (type default) (color 0 0 0 0))
+          (fill (type none))
+        )
+      )
+      (symbol "Q_NPN_BEC_1_1"
+        (pin input line (at -5.08 0 0) (length 5.715)
+          (name "B" (effects (font (size 1.27 1.27))))
+          (number "1" (effects (font (size 1.27 1.27))))
+        )
+        (pin passive line (at 2.54 -5.08 90) (length 2.54)
+          (name "E" (effects (font (size 1.27 1.27))))
+          (number "2" (effects (font (size 1.27 1.27))))
+        )
+        (pin passive line (at 2.54 5.08 270) (length 2.54)
+          (name "C" (effects (font (size 1.27 1.27))))
+          (number "3" (effects (font (size 1.27 1.27))))
+        )
+      )
+    )
     (symbol "Device:R_Small_US" (pin_numbers hide) (pin_names (offset 0.254) hide) (in_bom yes) (on_board yes)
       (property "Reference" "R" (id 0) (at 0.762 0.508 0)
         (effects (font (size 1.27 1.27)) (justify left))
@@ -262,419 +339,322 @@
         )
       )
     )
-    (symbol "Logic_LevelTranslator:TXB0104PW" (in_bom yes) (on_board yes)
-      (property "Reference" "U" (id 0) (at -6.35 16.51 0)
+    (symbol "Interface_Expansion:MCP23017_SS" (pin_names (offset 1.016)) (in_bom yes) (on_board yes)
+      (property "Reference" "U" (id 0) (at -11.43 24.13 0)
         (effects (font (size 1.27 1.27)))
       )
-      (property "Value" "TXB0104PW" (id 1) (at 3.81 16.51 0)
-        (effects (font (size 1.27 1.27)) (justify left))
+      (property "Value" "MCP23017_SS" (id 1) (at 0 0 0)
+        (effects (font (size 1.27 1.27)))
       )
-      (property "Footprint" "Package_SO:TSSOP-14_4.4x5mm_P0.65mm" (id 2) (at 0 -19.05 0)
+      (property "Footprint" "Package_SO:SSOP-28_5.3x10.2mm_P0.65mm" (id 2) (at 5.08 -25.4 0)
+        (effects (font (size 1.27 1.27)) (justify left) hide)
+      )
+      (property "Datasheet" "http://ww1.microchip.com/downloads/en/DeviceDoc/20001952C.pdf" (id 3) (at 5.08 -27.94 0)
+        (effects (font (size 1.27 1.27)) (justify left) hide)
+      )
+      (property "ki_keywords" "I2C parallel port expander" (id 4) (at 0 0 0)
         (effects (font (size 1.27 1.27)) hide)
       )
-      (property "Datasheet" "http://www.ti.com/lit/ds/symlink/txb0104.pdf" (id 3) (at 2.794 2.413 0)
+      (property "ki_description" "16-bit I/O expander, I2C, interrupts, w pull-ups, SSOP-28" (id 5) (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (property "ki_fp_filters" "SSOP*5.3x10.2mm*P0.65mm*" (id 6) (at 0 0 0)
+        (effects (font (size 1.27 1.27)) hide)
+      )
+      (symbol "MCP23017_SS_0_1"
+        (rectangle (start -12.7 22.86) (end 12.7 -22.86)
+          (stroke (width 0.254) (type default) (color 0 0 0 0))
+          (fill (type background))
+        )
+      )
+      (symbol "MCP23017_SS_1_1"
+        (pin bidirectional line (at 17.78 20.32 180) (length 5.08)
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+        )
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+          (number "10" (effects (font (size 1.27 1.27))))
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+        (pin no_connect line (at -12.7 15.24 0) (length 5.08) hide
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@@ -1875,140 +1819,152 @@
     (pin "1" (uuid 0d148bb7-50a9-441d-9553-f53780561e51))
   )
 
-  (symbol (lib_id "Diode:1N4148") (at 111.76 76.2 180) (unit 1)
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     (uuid 356e24de-bf9f-445b-94c5-f519bbbf9d0a)
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-    (property "Value" "1N4148" (id 1) (at 111.76 73.7671 0))
-    (property "Footprint" "Diode_SMD:D_0805_2012Metric" (id 2) (at 111.76 71.755 0)
+    (property "Reference" "D1" (id 0) (at 141.605 35.6702 0))
+    (property "Value" "1N4148" (id 1) (at 141.605 38.2071 0))
+    (property "Footprint" "Diode_SMD:D_0805_2012Metric" (id 2) (at 141.605 36.195 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" (id 3) (at 111.76 76.2 0)
+    (property "Datasheet" "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" (id 3) (at 141.605 40.64 0)
       (effects (font (size 1.27 1.27)) hide)
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-    (property "Footprint" "Package_SO:SOIC-16_3.9x9.9mm_P1.27mm" (id 2) (at 77.47 173.99 0)
+    (uuid 3b1ecc86-ea79-4815-a74e-60ce2833cda7)
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       (effects (font (size 1.27 1.27)) hide)
     )
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+    (property "Value" "VCC" (id 1) (at 142.875 81.5142 0))
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+    (property "Datasheet" "" (id 3) (at 142.875 85.09 0)
+      (effects (font (size 1.27 1.27)) hide)
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   )
 
-  (symbol (lib_id "power:VCC") (at 87.63 171.45 270) (mirror x) (unit 1)
+  (symbol (lib_id "Device:Q_NPN_BEC") (at 160.02 38.735 0) (mirror y) (unit 1)
     (in_bom yes) (on_board yes) (fields_autoplaced)
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-      (effects (font (size 1.27 1.27)) hide)
-    )
-    (property "Value" "VCC" (id 1) (at 90.805 171.8838 90)
+    (uuid 42af084a-a02a-44aa-a7cf-2b33f4468dd4)
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       (effects (font (size 1.27 1.27)) (justify left))
     )
-    (property "Footprint" "" (id 2) (at 87.63 171.45 0)
+    (property "Value" "PMBT3904" (id 1) (at 155.1687 40.4372 0)
+      (effects (font (size 1.27 1.27)) (justify left))
+    )
+    (property "Footprint" "Package_TO_SOT_SMD:SOT-23" (id 2) (at 154.94 36.195 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (id 3) (at 87.63 171.45 0)
+    (property "Datasheet" "~" (id 3) (at 160.02 38.735 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (pin "1" (uuid 72827926-9e3a-4069-bce1-ec28701b1988))
+    (pin "1" (uuid 915f5d8d-635a-4fca-a2a0-1ba044063677))
+    (pin "2" (uuid 07df9dbf-cc7e-420f-9d4e-2579ac5dd292))
+    (pin "3" (uuid 43cc46b9-a98f-48a2-a7a2-7fd1b6b8b882))
   )
 
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-    )
-    (property "Footprint" "Package_SO:SOIC-16_3.9x9.9mm_P1.27mm" (id 2) (at 77.47 127 0)
+    (uuid 5006bf55-cb41-4f11-93a9-21824589622c)
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       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (id 3) (at 77.47 127 0)
+    (property "Value" "GND" (id 1) (at 52.705 142.6738 90)
+      (effects (font (size 1.27 1.27)) (justify right))
+    )
+    (property "Footprint" "" (id 2) (at 49.53 142.24 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (pin "1" (uuid b4c708df-bdab-4e41-8779-87e434c61a37))
-    (pin "10" (uuid ee824fae-766f-41ab-98ef-4be9b9436732))
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-    (pin "13" (uuid 1d3a422a-40f8-47e3-834b-6b244e00c7b0))
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-    (pin "2" (uuid 0a38d129-2999-40c9-b208-e1c0345c4173))
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-    (pin "4" (uuid 429d1ea1-9ac5-4865-8af4-62043a1b35cc))
-    (pin "5" (uuid 6f9ce3b3-f361-4e9d-afab-ec28fd22228a))
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-    (pin "9" (uuid fa6ae721-2915-465b-85fd-6caca4f581e0))
+    (property "Datasheet" "" (id 3) (at 49.53 142.24 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid db2c783e-7f1a-45aa-a40c-1025a5f8993b))
   )
 
-  (symbol (lib_id "Device:R_Small_US") (at 107.95 64.77 0) (unit 1)
+  (symbol (lib_id "power:+3V3") (at 145.415 110.49 180) (unit 1)
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-    (uuid 5541f77b-6f5e-4cb5-a67d-983c57869128)
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-    )
-    (property "Value" "10K" (id 1) (at 109.601 66.4722 0)
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-    )
-    (property "Footprint" "Resistor_SMD:R_0805_2012Metric" (id 2) (at 107.95 64.77 0)
+    (uuid 557e344d-d753-420b-be7b-d45199f45577)
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       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "~" (id 3) (at 107.95 64.77 0)
+    (property "Value" "+3V3" (id 1) (at 145.415 114.9334 0))
+    (property "Footprint" "" (id 2) (at 145.415 110.49 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (pin "1" (uuid 07a782ec-e997-4956-bddc-b672f897d770))
-    (pin "2" (uuid 000904b5-db20-4830-b45f-9e446df2e199))
+    (property "Datasheet" "" (id 3) (at 145.415 110.49 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid d198ba89-dfb2-4d68-8b86-58279a302787))
   )
 
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     (uuid 6167f641-8f54-4c89-93ce-e5d8771b9bf3)
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       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "+3V3" (id 1) (at 152.4 37.0642 0))
-    (property "Footprint" "" (id 2) (at 152.4 40.64 0)
+    (property "Value" "+3V3" (id 1) (at 178.435 75.1642 0))
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       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (id 3) (at 152.4 40.64 0)
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       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid 39e6f0d6-e13e-498e-b1c5-cd65fedb0864))
   )
 
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+    (in_bom yes) (on_board yes) (fields_autoplaced)
+    (uuid 61c8b9aa-72a6-40b9-b4f1-e09d373b1e85)
+    (property "Reference" "U13" (id 0) (at 92.5956 91.5502 0)
+      (effects (font (size 1.27 1.27)) (justify right))
+    )
+    (property "Value" "MCP23017_SS" (id 1) (at 92.5956 94.0871 0)
+      (effects (font (size 1.27 1.27)) (justify right))
+    )
+    (property "Footprint" "Package_SO:SSOP-28_5.3x10.2mm_P0.65mm" (id 2) (at 86.995 143.51 0)
+      (effects (font (size 1.27 1.27)) (justify left) hide)
+    )
+    (property "Datasheet" "http://ww1.microchip.com/downloads/en/DeviceDoc/20001952C.pdf" (id 3) (at 86.995 146.05 0)
+      (effects (font (size 1.27 1.27)) (justify left) hide)
+    )
+    (pin "1" (uuid e19c5fc8-0056-43c2-a3b8-f3af26dee738))
+    (pin "10" (uuid 18436718-b36b-4688-acc7-c8392993da61))
+    (pin "11" (uuid 84348610-4d51-40d0-bd82-3c08c3f69729))
+    (pin "12" (uuid dbfd120b-8dfd-4d1f-b702-4f098d3a39c1))
+    (pin "13" (uuid 1ef202dd-1377-4acd-9a6c-54dfbd1e32d0))
+    (pin "14" (uuid 9eccef25-6884-46e1-901e-6cf69d0cacda))
+    (pin "15" (uuid 56c2aaea-7b6b-4774-83e0-9818209f77bc))
+    (pin "16" (uuid d6862845-aefe-412c-9348-745e0c10c532))
+    (pin "17" (uuid fce75091-ae95-46c7-be43-d5b6becef7c2))
+    (pin "18" (uuid b93f684d-d7ed-495f-9b5d-17bd21b682b0))
+    (pin "19" (uuid 4043014d-1956-491c-809b-e16a543ad5d7))
+    (pin "2" (uuid 78fb0b5d-c4d8-4bbf-a96b-492be43c3749))
+    (pin "20" (uuid 30d48e32-b5ed-412c-b762-bcde503e58d7))
+    (pin "21" (uuid 026125fe-ef5f-40e5-82f5-c1287d30d59a))
+    (pin "22" (uuid 8b59ecff-28f5-418d-8fe0-746e848771d7))
+    (pin "23" (uuid 418616df-de39-4965-a6be-0bec11f35022))
+    (pin "24" (uuid 8ee44c8f-987a-4006-8f2a-60b572623e04))
+    (pin "25" (uuid 264e5537-675c-4272-ae3c-bd2f3df6c541))
+    (pin "26" (uuid ddd8d27f-16af-455b-9cb7-69996ee00766))
+    (pin "27" (uuid a8a01d3b-d4b7-4d9b-a1f0-b84bacaf4b94))
+    (pin "28" (uuid 266142b7-b6c5-4ff4-a267-3445f7e28e2f))
+    (pin "3" (uuid 2978e74f-4ba7-4d41-af60-053ba9ba3d42))
+    (pin "4" (uuid bfd8b682-ddb0-40af-a1d1-e46928b99e9f))
+    (pin "5" (uuid 87822bbb-1ccf-4350-93c2-91be2205e3d7))
+    (pin "6" (uuid 35f15aeb-48af-47db-8faa-24411459128f))
+    (pin "7" (uuid 40b5fd0e-724e-47ce-b3af-ce1f37d614ea))
+    (pin "8" (uuid a3129315-7a87-4ed0-a120-90b3585c774b))
+    (pin "9" (uuid cc5ff96a-0510-4eb0-b11e-d67b498b854f))
+  )
+
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@@ -2025,38 +1981,38 @@
     (pin "1" (uuid 158e33dc-403c-4f12-9295-d5564f984653))
   )
 
-  (symbol (lib_id "power:VCC") (at 87.63 31.75 270) (mirror x) (unit 1)
+  (symbol (lib_id "power:VCC") (at 152.4 26.67 0) (unit 1)
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-    (uuid 69c47efd-648d-4314-a029-52dc000890d2)
-    (property "Reference" "#PWR035" (id 0) (at 83.82 31.75 0)
+    (uuid 64b1a3ae-649c-40e9-a978-f2ac47a5fb3d)
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       (effects (font (size 1.27 1.27)) hide)
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-    (property "Value" "VCC" (id 1) (at 90.805 32.1838 90)
-      (effects (font (size 1.27 1.27)) (justify left))
-    )
-    (property "Footprint" "" (id 2) (at 87.63 31.75 0)
+    (property "Value" "VCC" (id 1) (at 152.4 23.0942 0))
+    (property "Footprint" "" (id 2) (at 152.4 26.67 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (id 3) (at 87.63 31.75 0)
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-    (pin "1" (uuid aa3db0d2-5bb0-4ec8-a134-36470c7691b8))
+    (pin "1" (uuid b1ec60b8-bcd2-48bf-b38f-c6cfdb7a6bf4))
   )
 
-  (symbol (lib_id "power:VCC") (at 125.73 35.56 0) (unit 1)
+  (symbol (lib_id "power:GND") (at 109.855 120.65 90) (unit 1)
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-    (uuid 6be8bc19-2909-4743-8c97-69a5ca2f9bfc)
-    (property "Reference" "#PWR036" (id 0) (at 125.73 39.37 0)
+    (uuid 6ef489fa-50ae-424f-8066-aab669f1b4da)
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       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "VCC" (id 1) (at 125.73 31.9842 0))
-    (property "Footprint" "" (id 2) (at 125.73 35.56 0)
+    (property "Value" "GND" (id 1) (at 113.03 121.0838 90)
+      (effects (font (size 1.27 1.27)) (justify right))
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       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (id 3) (at 125.73 35.56 0)
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-    (pin "1" (uuid b684b623-dce8-4d45-b4c8-813726e96bab))
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@@ -2116,19 +2072,60 @@
     (pin "9" (uuid 406bdb52-8790-4f5f-94b7-315b36a2eb2b))
   )
 
-  (symbol (lib_id "parts:Qt_Py_RP2040") (at 152.4 50.8 0) (unit 1)
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+    (uuid 73e65684-2a46-4219-bcb5-b2750583ef31)
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-    (property "Value" "Qt_Py_RP2040" (id 1) (at 154.4194 40.64 0)
-      (effects (font (size 1.27 1.27)) (justify left))
+    (property "Value" "TXS0102DCT" (id 1) (at 145.9356 112.5173 0)
+      (effects (font (size 1.27 1.27)) (justify right))
     )
-    (property "Footprint" "xiao_lib:Seeeduino XIAO-MOUDLE14P-2.54-21X17.8MM" (id 2) (at 147.32 39.37 0)
+    (property "Footprint" "Package_SO:SSOP-8_2.95x2.8mm_P0.65mm" (id 2) (at 145.415 111.76 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (id 3) (at 147.32 39.37 0)
+    (property "Datasheet" "http://www.ti.com/lit/gpn/txs0102" (id 3) (at 145.415 98.298 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid b493bc4a-bb51-47ca-9038-a7838a56b3d0))
+    (pin "2" (uuid f0a0cb0f-8abc-4b03-8773-5bcded3e65b7))
+    (pin "3" (uuid 9412df1a-ce12-4e96-818e-4b92081c21f4))
+    (pin "4" (uuid 41299c08-7f27-41c2-83e0-0bfbe17f52d7))
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+    (pin "6" (uuid e8397e6a-108e-446c-a430-a65cb5d3504e))
+    (pin "7" (uuid 7dd4de4c-9bfb-4794-bf33-18eaf48798e1))
+    (pin "8" (uuid 39d54612-1c58-44eb-812e-a3ce54f9dfa6))
+  )
+
+  (symbol (lib_id "power:VCC") (at 92.075 90.17 0) (unit 1)
+    (in_bom yes) (on_board yes) (fields_autoplaced)
+    (uuid 78292f21-cff4-4c6d-883d-98a6b0f96f1d)
+    (property "Reference" "#PWR0109" (id 0) (at 92.075 93.98 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Value" "VCC" (id 1) (at 92.075 86.5942 0))
+    (property "Footprint" "" (id 2) (at 92.075 90.17 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "" (id 3) (at 92.075 90.17 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid 9300240d-99cb-4664-838b-4123ee4e73d7))
+  )
+
+  (symbol (lib_id "parts:Qt_Py_RP2040") (at 178.435 88.9 0) (unit 1)
+    (in_bom yes) (on_board yes) (fields_autoplaced)
+    (uuid 82394276-3358-44df-99f7-eb9043ea3a2b)
+    (property "Reference" "U15" (id 0) (at 180.4544 76.2 0)
+      (effects (font (size 1.27 1.27)) (justify left))
+    )
+    (property "Value" "Qt_Py_RP2040" (id 1) (at 180.4544 78.74 0)
+      (effects (font (size 1.27 1.27)) (justify left))
+    )
+    (property "Footprint" "xiao_lib:Seeeduino XIAO-MOUDLE14P-2.54-21X17.8MM" (id 2) (at 173.355 77.47 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "" (id 3) (at 173.355 77.47 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid 66cac97b-5a0e-4382-af2b-8bd39b155b86))
@@ -2147,85 +2144,71 @@
     (pin "9" (uuid 69c7219b-4405-4d7e-bc40-e2934ebc05d7))
   )
 
-  (symbol (lib_id "power:GND") (at 152.4 64.77 0) (unit 1)
+  (symbol (lib_id "power:GND") (at 178.435 102.87 0) (unit 1)
     (in_bom yes) (on_board yes) (fields_autoplaced)
     (uuid 8675249d-98f0-4d57-91ad-f2ddf71a2232)
-    (property "Reference" "#PWR0103" (id 0) (at 152.4 71.12 0)
+    (property "Reference" "#PWR0103" (id 0) (at 178.435 109.22 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "GND" (id 1) (at 152.4 69.2134 0))
-    (property "Footprint" "" (id 2) (at 152.4 64.77 0)
+    (property "Value" "GND" (id 1) (at 178.435 107.3134 0))
+    (property "Footprint" "" (id 2) (at 178.435 102.87 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (id 3) (at 152.4 64.77 0)
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       (effects (font (size 1.27 1.27)) hide)
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     (pin "1" (uuid c5112348-8358-4c54-93ea-fa2a8a41a983))
   )
 
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     (uuid 8827961a-6fff-4b42-93ee-75edf199a9b7)
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-    (property "Footprint" "Diode_SMD:D_0805_2012Metric" (id 2) (at 111.76 79.375 0)
+    (property "Reference" "D2" (id 0) (at 141.605 43.2902 0))
+    (property "Value" "1N4148" (id 1) (at 141.605 45.8271 0))
+    (property "Footprint" "Diode_SMD:D_0805_2012Metric" (id 2) (at 141.605 43.815 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" (id 3) (at 111.76 83.82 0)
+    (property "Datasheet" "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" (id 3) (at 141.605 48.26 0)
       (effects (font (size 1.27 1.27)) hide)
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     (pin "2" (uuid 8b26965d-664a-4d35-a709-007841993c52))
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-    (uuid 939d0f59-acdb-4a8a-855b-a436687b7535)
-    (property "Reference" "#PWR043" (id 0) (at 144.78 60.96 0)
+  (symbol (lib_id "power:VCC") (at 109.855 138.43 270) (unit 1)
+    (in_bom yes) (on_board yes) (fields_autoplaced)
+    (uuid 8b1479d4-4965-45ec-86da-96e7f2c6e42d)
+    (property "Reference" "#PWR0114" (id 0) (at 106.045 138.43 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "GND" (id 1) (at 138.43 63.5 90)
+    (property "Value" "VCC" (id 1) (at 113.03 138.8638 90)
+      (effects (font (size 1.27 1.27)) (justify left))
+    )
+    (property "Footprint" "" (id 2) (at 109.855 138.43 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "" (id 3) (at 109.855 138.43 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid 4151868a-a813-4aa7-a20e-19fc5d3d7eaa))
+  )
+
+  (symbol (lib_id "power:GND") (at 111.125 69.85 90) (unit 1)
+    (in_bom yes) (on_board yes) (fields_autoplaced)
+    (uuid a9f2142f-fe12-4bd3-8416-9bd705fab6e3)
+    (property "Reference" "#PWR0110" (id 0) (at 117.475 69.85 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Value" "GND" (id 1) (at 114.3 70.2838 90)
       (effects (font (size 1.27 1.27)) (justify right))
     )
-    (property "Footprint" "" (id 2) (at 138.43 60.96 0)
+    (property "Footprint" "" (id 2) (at 111.125 69.85 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (id 3) (at 138.43 60.96 0)
+    (property "Datasheet" "" (id 3) (at 111.125 69.85 0)
       (effects (font (size 1.27 1.27)) hide)
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-    (property "Value" "VCC" (id 1) (at 77.47 15.4742 0))
-    (property "Footprint" "" (id 2) (at 77.47 19.05 0)
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-    )
-    (property "Datasheet" "" (id 3) (at 77.47 19.05 0)
-      (effects (font (size 1.27 1.27)) hide)
-    )
-    (pin "1" (uuid f7768f6a-ff27-448f-b818-2dc5b97c74a6))
-  )
-
-  (symbol (lib_id "power:GND") (at 77.47 54.61 0) (mirror y) (unit 1)
-    (in_bom yes) (on_board yes)
-    (uuid 99b714eb-f971-4530-becd-bb8d6622358e)
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-      (effects (font (size 1.27 1.27)) hide)
-    )
-    (property "Value" "GND" (id 1) (at 77.47 58.42 0))
-    (property "Footprint" "" (id 2) (at 77.47 54.61 0)
-      (effects (font (size 1.27 1.27)) hide)
-    )
-    (property "Datasheet" "" (id 3) (at 77.47 54.61 0)
-      (effects (font (size 1.27 1.27)) hide)
-    )
-    (pin "1" (uuid 12d17b04-f0bd-4d86-8936-395379e6c572))
+    (pin "1" (uuid b0c4025f-b17e-4936-81be-2896d6ae5042))
   )
 
   (symbol (lib_id "power:GND") (at 29.21 86.36 0) (unit 1)
@@ -2244,19 +2227,19 @@
     (pin "1" (uuid dcf710f2-cdbe-4a06-ab3e-bbfa96950eec))
   )
 
-  (symbol (lib_id "Connector_Generic:Conn_01x03") (at 165.1 60.96 0) (unit 1)
+  (symbol (lib_id "Connector_Generic:Conn_01x03") (at 192.405 99.06 0) (unit 1)
     (in_bom yes) (on_board yes)
     (uuid af7f3c52-bc25-4835-b3e2-3b00328b6c05)
-    (property "Reference" "J3" (id 0) (at 164.2653 65.532 90)
+    (property "Reference" "J3" (id 0) (at 191.5703 103.632 90)
       (effects (font (size 1.27 1.27)) (justify right))
     )
-    (property "Value" "QT Py Serial" (id 1) (at 167.64 55.88 90)
+    (property "Value" "QT Py Serial" (id 1) (at 194.945 93.98 90)
       (effects (font (size 1.27 1.27)) (justify right))
     )
-    (property "Footprint" "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" (id 2) (at 165.1 60.96 0)
+    (property "Footprint" "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" (id 2) (at 192.405 99.06 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "~" (id 3) (at 165.1 60.96 0)
+    (property "Datasheet" "~" (id 3) (at 192.405 99.06 0)
       (effects (font (size 1.27 1.27)) hide)
     )
     (pin "1" (uuid 8c9539b2-d44e-4e03-b623-a32d2bc1f6ae))
@@ -2264,242 +2247,203 @@
     (pin "3" (uuid 1d8b174b-b07b-4f15-acbb-b3929eb8c7cb))
   )
 
-  (symbol (lib_id "power:VCC") (at 87.63 124.46 270) (mirror x) (unit 1)
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-    (uuid b9e597a3-986d-4999-80ed-822951dabe2b)
-    (property "Reference" "#PWR058" (id 0) (at 83.82 124.46 0)
+  (symbol (lib_id "power:+3V3") (at 155.575 105.41 270) (unit 1)
+    (in_bom yes) (on_board yes)
+    (uuid b1ffe682-5c86-4180-ba14-ff276ce5b28c)
+    (property "Reference" "#PWR0125" (id 0) (at 151.765 105.41 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "VCC" (id 1) (at 90.805 124.8938 90)
+    (property "Value" "+3V3" (id 1) (at 158.115 105.41 90)
       (effects (font (size 1.27 1.27)) (justify left))
     )
-    (property "Footprint" "" (id 2) (at 87.63 124.46 0)
+    (property "Footprint" "" (id 2) (at 155.575 105.41 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (id 3) (at 87.63 124.46 0)
+    (property "Datasheet" "" (id 3) (at 155.575 105.41 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (pin "1" (uuid 6ca0d186-0ea3-4ed2-95bb-883b40a5a6f9))
+    (pin "1" (uuid 4c5d73b0-8c36-4545-9ad4-af2dab5df7ca))
   )
 
-  (symbol (lib_id "power:VCC") (at 87.63 77.47 270) (mirror x) (unit 1)
+  (symbol (lib_id "Device:R_Small_US") (at 152.4 64.135 0) (unit 1)
     (in_bom yes) (on_board yes) (fields_autoplaced)
-    (uuid bc20e92d-9fc1-4f1a-92a2-a602cb035251)
-    (property "Reference" "#PWR048" (id 0) (at 83.82 77.47 0)
-      (effects (font (size 1.27 1.27)) hide)
-    )
-    (property "Value" "VCC" (id 1) (at 90.805 77.9038 90)
+    (uuid b49890cb-1a8b-4b0c-b8fa-9de2c5111110)
+    (property "Reference" "R2" (id 0) (at 154.051 63.3003 0)
       (effects (font (size 1.27 1.27)) (justify left))
     )
-    (property "Footprint" "" (id 2) (at 87.63 77.47 0)
+    (property "Value" "10K" (id 1) (at 154.051 65.8372 0)
+      (effects (font (size 1.27 1.27)) (justify left))
+    )
+    (property "Footprint" "Resistor_SMD:R_0603_1608Metric" (id 2) (at 152.4 64.135 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (id 3) (at 87.63 77.47 0)
+    (property "Datasheet" "~" (id 3) (at 152.4 64.135 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (pin "1" (uuid 63d6dc96-2f81-47ab-9e50-5a64eec9f487))
+    (pin "1" (uuid 4f6cc742-a67f-4bba-8710-ab0831971c57))
+    (pin "2" (uuid 9a778a3c-7223-4b29-8ec4-d2a658651498))
   )
 
-  (symbol (lib_id "power:GND") (at 77.47 147.32 0) (mirror y) (unit 1)
+  (symbol (lib_id "power:VCC") (at 152.4 61.595 0) (unit 1)
     (in_bom yes) (on_board yes) (fields_autoplaced)
-    (uuid bec679f3-deeb-4490-bd85-50863de2ad04)
-    (property "Reference" "#PWR060" (id 0) (at 77.47 153.67 0)
+    (uuid b5efd40d-d11d-4ed1-aab1-8cbb62a62e0f)
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       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "GND" (id 1) (at 77.47 151.7634 0))
-    (property "Footprint" "" (id 2) (at 77.47 147.32 0)
+    (property "Value" "VCC" (id 1) (at 152.4 58.0192 0))
+    (property "Footprint" "" (id 2) (at 152.4 61.595 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (id 3) (at 77.47 147.32 0)
+    (property "Datasheet" "" (id 3) (at 152.4 61.595 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (pin "1" (uuid 71e34d16-ba2b-40d6-9d87-4b0f7bede0fd))
+    (pin "1" (uuid 2bf06863-744f-426d-96c9-48240aa6d7a2))
   )
 
-  (symbol (lib_id "power:VCC") (at 77.47 64.77 0) (mirror y) (unit 1)
+  (symbol (lib_id "power:GND") (at 111.125 134.62 90) (unit 1)
     (in_bom yes) (on_board yes) (fields_autoplaced)
-    (uuid c6d98b8a-1375-446b-9934-4d9127392340)
-    (property "Reference" "#PWR044" (id 0) (at 77.47 68.58 0)
+    (uuid bc621e84-6818-495c-bb89-f147bd50fb83)
+    (property "Reference" "#PWR0116" (id 0) (at 117.475 134.62 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "VCC" (id 1) (at 77.47 61.1942 0))
-    (property "Footprint" "" (id 2) (at 77.47 64.77 0)
+    (property "Value" "GND" (id 1) (at 114.3 135.0538 90)
+      (effects (font (size 1.27 1.27)) (justify right))
+    )
+    (property "Footprint" "" (id 2) (at 111.125 134.62 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "" (id 3) (at 77.47 64.77 0)
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       (effects (font (size 1.27 1.27)) hide)
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-    (pin "1" (uuid 79e518c3-b07c-4880-9649-4f1afdca12e6))
+    (pin "1" (uuid 77d8aaf0-78db-4b8f-9c45-7080f64ca3a2))
   )
 
-  (symbol (lib_id "power:GND") (at 160.02 63.5 0) (unit 1)
+  (symbol (lib_id "power:GND") (at 92.075 80.01 0) (unit 1)
+    (in_bom yes) (on_board yes) (fields_autoplaced)
+    (uuid c407f1b5-f6d8-48a1-b9f8-bb39e78b3569)
+    (property "Reference" "#PWR0108" (id 0) (at 92.075 86.36 0)
+      (effects (font (size 1.27 1.27)) hide)
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+    (property "Value" "GND" (id 1) (at 92.075 84.4534 0))
+    (property "Footprint" "" (id 2) (at 92.075 80.01 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "" (id 3) (at 92.075 80.01 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid 4e0cfdaa-40cc-4b9f-94ed-e91ce293a322))
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+
+  (symbol (lib_id "power:+3V3") (at 147.955 85.09 0) (unit 1)
+    (in_bom yes) (on_board yes) (fields_autoplaced)
+    (uuid d8f6a386-76d3-4f84-bc8f-1c0daa0d2d4a)
+    (property "Reference" "#PWR0123" (id 0) (at 147.955 88.9 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Value" "+3V3" (id 1) (at 147.955 81.5142 0))
+    (property "Footprint" "" (id 2) (at 147.955 85.09 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "" (id 3) (at 147.955 85.09 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid 3921b3a2-47a0-4216-aec6-8a2a8916ec9e))
+  )
+
+  (symbol (lib_id "power:GND") (at 187.325 101.6 0) (unit 1)
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     (uuid d9f68e6c-82ae-4ed3-b136-af1a607be30f)
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       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Value" "GND" (id 1) (at 160.02 67.9434 0))
-    (property "Footprint" "" (id 2) (at 160.02 63.5 0)
+    (property "Value" "GND" (id 1) (at 187.325 106.0434 0))
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       (effects (font (size 1.27 1.27)) hide)
     )
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-    )
-    (property "Footprint" "Package_SO:TSSOP-14_4.4x5mm_P0.65mm" (id 2) (at 128.27 72.39 0)
+  (symbol (lib_id "power:GND") (at 157.48 78.74 0) (unit 1)
+    (in_bom yes) (on_board yes) (fields_autoplaced)
+    (uuid dcce438b-4f38-4f68-85c2-00e6c11eb78e)
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     )
-    (property "Datasheet" "http://www.ti.com/lit/ds/symlink/txb0104.pdf" (id 3) (at 125.476 50.927 0)
+    (property "Value" "GND" (id 1) (at 157.48 83.1834 0))
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       (effects (font (size 1.27 1.27)) hide)
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-    (pin "1" (uuid 8f0e9ad6-9aa9-467f-8dd3-bbb53ea6b8db))
-    (pin "10" (uuid 1de7dbfd-9a54-41bc-b2d8-9c9d231a131e))
-    (pin "11" (uuid ab570a67-0811-4baf-b564-1c9d33f500f8))
-    (pin "12" (uuid 4909877c-c855-4aab-ab0d-4018b46d534f))
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-    (property "Footprint" "Diode_SMD:D_0805_2012Metric" (id 2) (at 111.76 94.615 0)
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-    (property "Value" "HEF4094BT" (id 1) (at 75.4506 20.4271 0)
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       (effects (font (size 1.27 1.27)) hide)
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-    (property "Datasheet" "" (id 3) (at 77.47 34.29 0)
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+    (pin "3" (uuid 839b7b44-d978-46a6-8acf-031261de2c14))
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-  (symbol (lib_id "power:GND") (at 77.47 100.33 0) (mirror y) (unit 1)
+  (symbol (lib_id "power:GND") (at 109.855 54.61 90) (unit 1)
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-    (uuid e93091f7-1bda-4e27-a86a-d7fbc341bbae)
-    (property "Reference" "#PWR053" (id 0) (at 77.47 106.68 0)
+    (uuid ee630344-7ee6-445f-9881-419e833d5a88)
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     )
-    (property "Value" "GND" (id 1) (at 77.47 104.7734 0))
-    (property "Footprint" "" (id 2) (at 77.47 100.33 0)
+    (property "Value" "GND" (id 1) (at 113.03 55.0438 90)
+      (effects (font (size 1.27 1.27)) (justify right))
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+    (property "Footprint" "" (id 2) (at 109.855 54.61 0)
       (effects (font (size 1.27 1.27)) hide)
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       (effects (font (size 1.27 1.27)) hide)
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-    (pin "1" (uuid c4d67eb5-9ceb-4e11-9221-b6b5449967af))
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-  (symbol (lib_id "Diode:1N4148") (at 111.76 91.44 180) (unit 1)
+  (symbol (lib_id "Diode:1N4148") (at 141.605 55.88 180) (unit 1)
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     (uuid fff3b19d-fc30-4952-8688-a5fd6220e4f0)
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-    (property "Value" "1N4148" (id 1) (at 111.76 89.0071 0))
-    (property "Footprint" "Diode_SMD:D_0805_2012Metric" (id 2) (at 111.76 86.995 0)
+    (property "Reference" "D3" (id 0) (at 141.605 50.9102 0))
+    (property "Value" "1N4148" (id 1) (at 141.605 53.4471 0))
+    (property "Footprint" "Diode_SMD:D_0805_2012Metric" (id 2) (at 141.605 51.435 0)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" (id 3) (at 111.76 91.44 0)
+    (property "Datasheet" "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" (id 3) (at 141.605 55.88 0)
       (effects (font (size 1.27 1.27)) hide)
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diff --git a/ram_rom-MemoryPgm.pdf b/ram_rom-MemoryPgm.pdf
new file mode 100644
index 0000000..0b183d9
Binary files /dev/null and b/ram_rom-MemoryPgm.pdf differ
diff --git a/ram_rom.kicad_pro b/ram_rom.kicad_pro
index 8a7500d..11130a9 100644
--- a/ram_rom.kicad_pro
+++ b/ram_rom.kicad_pro
@@ -365,7 +365,7 @@
       "gencad": "",
       "idf": "",
       "netlist": "",
-      "specctra_dsn": "",
+      "specctra_dsn": "ram_rom.dsn",
       "step": "",
       "vrml": ""
     },
diff --git a/ram_rom.kicad_sch b/ram_rom.kicad_sch
index 8f283ab..30c7b98 100644
--- a/ram_rom.kicad_sch
+++ b/ram_rom.kicad_sch
@@ -3138,60 +3138,9 @@
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-    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/089f7722-0a77-42df-a037-48fb31bfe65e"
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-    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/b9e597a3-986d-4999-80ed-822951dabe2b"
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-    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/bec679f3-deeb-4490-bd85-50863de2ad04"
-      (reference "#PWR060") (unit 1) (value "GND") (footprint "")
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-    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/f00cc059-7fc8-42b7-a747-2b01b6ced754"
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-    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/408416b9-4fcb-4a4e-bfe4-f4a57e076d0a"
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-    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/0b168bf8-5294-406c-ad85-3c151df0e0f6"
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     (path "/86e5f351-3d38-4e3c-8bd7-6901476dc8e9"
       (reference "#PWR0101") (unit 1) (value "VCC") (footprint "")
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@@ -3213,6 +3162,60 @@
     (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/641cdcc1-2b9c-41ac-aa52-8c0fb873c260"
       (reference "#PWR0107") (unit 1) (value "GND") (footprint "")
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+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/c407f1b5-f6d8-48a1-b9f8-bb39e78b3569"
+      (reference "#PWR0108") (unit 1) (value "GND") (footprint "")
+    )
+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/78292f21-cff4-4c6d-883d-98a6b0f96f1d"
+      (reference "#PWR0109") (unit 1) (value "VCC") (footprint "")
+    )
+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/a9f2142f-fe12-4bd3-8416-9bd705fab6e3"
+      (reference "#PWR0110") (unit 1) (value "GND") (footprint "")
+    )
+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/ee630344-7ee6-445f-9881-419e833d5a88"
+      (reference "#PWR0111") (unit 1) (value "GND") (footprint "")
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+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/2b603d93-bb41-4d39-b519-631ad78850e8"
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+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/8b1479d4-4965-45ec-86da-96e7f2c6e42d"
+      (reference "#PWR0114") (unit 1) (value "VCC") (footprint "")
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+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/040b4d8d-4d9c-4a38-80b0-89233efffef8"
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+    )
+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/bc621e84-6818-495c-bb89-f147bd50fb83"
+      (reference "#PWR0116") (unit 1) (value "GND") (footprint "")
+    )
+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/0c6d1d3a-417e-4720-ac0f-11743e14f9e2"
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+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/b5efd40d-d11d-4ed1-aab1-8cbb62a62e0f"
+      (reference "#PWR0118") (unit 1) (value "VCC") (footprint "")
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+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/64b1a3ae-649c-40e9-a978-f2ac47a5fb3d"
+      (reference "#PWR0119") (unit 1) (value "VCC") (footprint "")
+    )
+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/5006bf55-cb41-4f11-93a9-21824589622c"
+      (reference "#PWR0120") (unit 1) (value "GND") (footprint "")
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+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/557e344d-d753-420b-be7b-d45199f45577"
+      (reference "#PWR0121") (unit 1) (value "+3V3") (footprint "")
+    )
+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/3b1ecc86-ea79-4815-a74e-60ce2833cda7"
+      (reference "#PWR0122") (unit 1) (value "VCC") (footprint "")
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+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/d8f6a386-76d3-4f84-bc8f-1c0daa0d2d4a"
+      (reference "#PWR0123") (unit 1) (value "+3V3") (footprint "")
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+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/dcce438b-4f38-4f68-85c2-00e6c11eb78e"
+      (reference "#PWR0124") (unit 1) (value "GND") (footprint "")
+    )
+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/b1ffe682-5c86-4180-ba14-ff276ce5b28c"
+      (reference "#PWR0125") (unit 1) (value "+3V3") (footprint "")
+    )
     (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/356e24de-bf9f-445b-94c5-f519bbbf9d0a"
       (reference "D1") (unit 1) (value "1N4148") (footprint "Diode_SMD:D_0805_2012Metric")
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@@ -3231,8 +3234,17 @@
     (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/af7f3c52-bc25-4835-b3e2-3b00328b6c05"
       (reference "J3") (unit 1) (value "QT Py Serial") (footprint "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical")
     )
-    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/5541f77b-6f5e-4cb5-a67d-983c57869128"
-      (reference "R4") (unit 1) (value "10K") (footprint "Resistor_SMD:R_0805_2012Metric")
+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/42af084a-a02a-44aa-a7cf-2b33f4468dd4"
+      (reference "Q1") (unit 1) (value "PMBT3904") (footprint "Package_TO_SOT_SMD:SOT-23")
+    )
+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/e153e9fa-13ff-4e3b-9600-91d5ed56dd4b"
+      (reference "Q2") (unit 1) (value "PMBT3904") (footprint "Package_TO_SOT_SMD:SOT-23")
+    )
+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/00db5152-4e59-4f54-aa46-33b558fd567e"
+      (reference "R1") (unit 1) (value "10K") (footprint "Resistor_SMD:R_0603_1608Metric")
+    )
+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/b49890cb-1a8b-4b0c-b8fa-9de2c5111110"
+      (reference "R2") (unit 1) (value "10K") (footprint "Resistor_SMD:R_0603_1608Metric")
     )
     (path "/d7ef4dd2-c126-4174-831f-b5118997fe12"
       (reference "U1") (unit 1) (value "74HC373") (footprint "Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm")
@@ -3261,27 +3273,21 @@
     (path "/6b9fcd17-acd3-496e-93c0-21b6c0cdc592"
       (reference "U9") (unit 1) (value "74HC237") (footprint "Package_SO:SOIC-16_3.9x9.9mm_P1.27mm")
     )
-    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/e60d3a7b-d212-445e-afcd-278f2ca239f8"
-      (reference "U11") (unit 1) (value "HEF4094BT") (footprint "Package_SO:SOIC-16_3.9x9.9mm_P1.27mm")
+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/02106f35-05f4-4406-be4a-d39887cc23d9"
+      (reference "U10") (unit 1) (value "MCP23017_SS") (footprint "Package_SO:SSOP-28_5.3x10.2mm_P0.65mm")
+    )
+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/73e65684-2a46-4219-bcb5-b2750583ef31"
+      (reference "U11") (unit 1) (value "TXS0102DCT") (footprint "Package_SO:SSOP-8_2.95x2.8mm_P0.65mm")
     )
     (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/71ef5dfe-f5ec-4ad4-86fa-4dc65cdd2751"
       (reference "U12") (unit 1) (value "IS61C3216AL-12TLI") (footprint "Package_SO:TSOP-II-44_10.16x18.41mm_P0.8mm")
     )
-    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/daa647d2-24f5-4dc6-8531-64dabe452d7e"
-      (reference "U13") (unit 1) (value "TXB0104PW") (footprint "Package_SO:TSSOP-14_4.4x5mm_P0.65mm")
-    )
-    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/1802e0fc-f750-4c1f-a6c2-0ac14aaed930"
-      (reference "U14") (unit 1) (value "HEF4094BT") (footprint "Package_SO:SOIC-16_3.9x9.9mm_P1.27mm")
+    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/61c8b9aa-72a6-40b9-b4f1-e09d373b1e85"
+      (reference "U13") (unit 1) (value "MCP23017_SS") (footprint "Package_SO:SSOP-28_5.3x10.2mm_P0.65mm")
     )
     (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/82394276-3358-44df-99f7-eb9043ea3a2b"
       (reference "U15") (unit 1) (value "Qt_Py_RP2040") (footprint "xiao_lib:Seeeduino XIAO-MOUDLE14P-2.54-21X17.8MM")
     )
-    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/4d9f313f-8863-49b7-9959-4ce854f1106f"
-      (reference "U16") (unit 1) (value "HEF4094BT") (footprint "Package_SO:SOIC-16_3.9x9.9mm_P1.27mm")
-    )
-    (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/3e8a9784-bb54-48c2-b56c-70ba829be848"
-      (reference "U17") (unit 1) (value "HEF4094BT") (footprint "Package_SO:SOIC-16_3.9x9.9mm_P1.27mm")
-    )
     (path "/2a13a5dd-7c2a-4eec-b51e-afcb62656758/2e345d74-4360-4a27-8a00-7781b32c0844"
       (reference "U18") (unit 1) (value "74LS243") (footprint "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm")
     )
diff --git a/ram_rom.pdf b/ram_rom.pdf
new file mode 100644
index 0000000..6583ae8
Binary files /dev/null and b/ram_rom.pdf differ