changes

.gitignore

@@ -0,0 +1,2 @@
+design/**/*-backups/*.zip
+*.lck

README.md

@@ -10,4 +10,5 @@
 # Arduino Interface
 
 ## Bus Ideas
-- [74HC245](./datasheets/74HC_HCT245.pdf), also possible for GPU buffer switching
+- [74HC245](./datasheets/74HC_HCT245.pdf), bidirectional 3-state bus transciever, also possible for GPU buffer switching
+- [74HC138](./datasheets/74HC_HCT138.pdf), 3->8 address decoder 

design/6502.kicad_pcb

@@ -1,83 +0,0 @@
-(kicad_pcb
-	(version 20240108)
-	(generator "pcbnew")
-	(generator_version "8.0")
-	(general
-		(thickness 1.6)
-		(legacy_teardrops no)
-	)
-	(paper "A4")
-	(layers
-		(0 "F.Cu" signal)
-		(31 "B.Cu" signal)
-		(32 "B.Adhes" user "B.Adhesive")
-		(33 "F.Adhes" user "F.Adhesive")
-		(34 "B.Paste" user)
-		(35 "F.Paste" user)
-		(36 "B.SilkS" user "B.Silkscreen")
-		(37 "F.SilkS" user "F.Silkscreen")
-		(38 "B.Mask" user)
-		(39 "F.Mask" user)
-		(40 "Dwgs.User" user "User.Drawings")
-		(41 "Cmts.User" user "User.Comments")
-		(42 "Eco1.User" user "User.Eco1")
-		(43 "Eco2.User" user "User.Eco2")
-		(44 "Edge.Cuts" user)
-		(45 "Margin" user)
-		(46 "B.CrtYd" user "B.Courtyard")
-		(47 "F.CrtYd" user "F.Courtyard")
-		(48 "B.Fab" user)
-		(49 "F.Fab" user)
-		(50 "User.1" user)
-		(51 "User.2" user)
-		(52 "User.3" user)
-		(53 "User.4" user)
-		(54 "User.5" user)
-		(55 "User.6" user)
-		(56 "User.7" user)
-		(57 "User.8" user)
-		(58 "User.9" user)
-	)
-	(setup
-		(pad_to_mask_clearance 0)
-		(allow_soldermask_bridges_in_footprints no)
-		(pcbplotparams
-			(layerselection 0x00010fc_ffffffff)
-			(plot_on_all_layers_selection 0x0000000_00000000)
-			(disableapertmacros no)
-			(usegerberextensions no)
-			(usegerberattributes yes)
-			(usegerberadvancedattributes yes)
-			(creategerberjobfile yes)
-			(dashed_line_dash_ratio 12.000000)
-			(dashed_line_gap_ratio 3.000000)
-			(svgprecision 4)
-			(plotframeref no)
-			(viasonmask no)
-			(mode 1)
-			(useauxorigin no)
-			(hpglpennumber 1)
-			(hpglpenspeed 20)
-			(hpglpendiameter 15.000000)
-			(pdf_front_fp_property_popups yes)
-			(pdf_back_fp_property_popups yes)
-			(dxfpolygonmode yes)
-			(dxfimperialunits yes)
-			(dxfusepcbnewfont yes)
-			(psnegative no)
-			(psa4output no)
-			(plotreference yes)
-			(plotvalue yes)
-			(plotfptext yes)
-			(plotinvisibletext no)
-			(sketchpadsonfab no)
-			(subtractmaskfromsilk no)
-			(outputformat 1)
-			(mirror no)
-			(drillshape 1)
-			(scaleselection 1)
-			(outputdirectory "")
-		)
-	)
-	(net 0 "")
-)

design/6502.kicad_sch

@@ -1,224 +0,0 @@
-(kicad_sch
-	(version 20250114)
-	(generator "eeschema")
-	(generator_version "9.0")
-	(uuid "27fa70ec-70f1-4ec5-9aef-43afe5f03596")
-	(paper "A4")
-	(lib_symbols)
-	(sheet
-		(at 148.59 53.34)
-		(size 55.88 29.21)
-		(exclude_from_sim no)
-		(in_bom yes)
-		(on_board yes)
-		(dnp no)
-		(fields_autoplaced yes)
-		(stroke
-			(width 0.1524)
-			(type solid)
-		)
-		(fill
-			(color 0 0 0 0.0000)
-		)
-		(uuid "1c85a34e-e029-471f-835a-c5cb1e337bcc")
-		(property "Sheetname" "clock_board"
-			(at 148.59 52.6284 0)
-			(effects
-				(font
-					(size 1.27 1.27)
-				)
-				(justify left bottom)
-			)
-		)
-		(property "Sheetfile" "clock_board.kicad_sch"
-			(at 148.59 83.1346 0)
-			(effects
-				(font
-					(size 1.27 1.27)
-				)
-				(justify left top)
-			)
-		)
-		(instances
-			(project "6502"
-				(path "/27fa70ec-70f1-4ec5-9aef-43afe5f03596"
-					(page "3")
-				)
-			)
-		)
-	)
-	(sheet
-		(at 215.9 109.22)
-		(size 53.34 31.75)
-		(exclude_from_sim no)
-		(in_bom yes)
-		(on_board yes)
-		(dnp no)
-		(fields_autoplaced yes)
-		(stroke
-			(width 0.1524)
-			(type solid)
-		)
-		(fill
-			(color 0 0 0 0.0000)
-		)
-		(uuid "1d965ac9-0bec-4308-b34c-251844cc958f")
-		(property "Sheetname" "lcd_board"
-			(at 215.9 108.5084 0)
-			(effects
-				(font
-					(size 1.27 1.27)
-				)
-				(justify left bottom)
-			)
-		)
-		(property "Sheetfile" "lcd_board.kicad_sch"
-			(at 215.9 141.5546 0)
-			(effects
-				(font
-					(size 1.27 1.27)
-				)
-				(justify left top)
-			)
-		)
-		(instances
-			(project "6502"
-				(path "/27fa70ec-70f1-4ec5-9aef-43afe5f03596"
-					(page "6")
-				)
-			)
-		)
-	)
-	(sheet
-		(at 30.48 36.83)
-		(size 73.66 44.45)
-		(exclude_from_sim no)
-		(in_bom yes)
-		(on_board yes)
-		(dnp no)
-		(fields_autoplaced yes)
-		(stroke
-			(width 0.1524)
-			(type solid)
-		)
-		(fill
-			(color 0 0 0 0.0000)
-		)
-		(uuid "84677476-d952-4526-bbdb-640c00b36086")
-		(property "Sheetname" "cpu_board"
-			(at 30.48 36.1184 0)
-			(effects
-				(font
-					(size 1.27 1.27)
-				)
-				(justify left bottom)
-			)
-		)
-		(property "Sheetfile" "cpu_board.kicad_sch"
-			(at 30.48 81.8646 0)
-			(effects
-				(font
-					(size 1.27 1.27)
-				)
-				(justify left top)
-			)
-		)
-		(instances
-			(project "6502"
-				(path "/27fa70ec-70f1-4ec5-9aef-43afe5f03596"
-					(page "2")
-				)
-			)
-		)
-	)
-	(sheet
-		(at 132.08 104.14)
-		(size 57.15 34.29)
-		(exclude_from_sim no)
-		(in_bom yes)
-		(on_board yes)
-		(dnp no)
-		(fields_autoplaced yes)
-		(stroke
-			(width 0.1524)
-			(type solid)
-		)
-		(fill
-			(color 0 0 0 0.0000)
-		)
-		(uuid "e6c14eea-6ae8-44d4-9ce7-edf7fac74b1a")
-		(property "Sheetname" "arduino_board"
-			(at 132.08 103.4284 0)
-			(effects
-				(font
-					(size 1.27 1.27)
-				)
-				(justify left bottom)
-			)
-		)
-		(property "Sheetfile" "arduino_board.kicad_sch"
-			(at 132.08 139.0146 0)
-			(effects
-				(font
-					(size 1.27 1.27)
-				)
-				(justify left top)
-			)
-		)
-		(instances
-			(project "6502"
-				(path "/27fa70ec-70f1-4ec5-9aef-43afe5f03596"
-					(page "4")
-				)
-			)
-		)
-	)
-	(sheet
-		(at 33.02 102.87)
-		(size 68.58 35.56)
-		(exclude_from_sim no)
-		(in_bom yes)
-		(on_board yes)
-		(dnp no)
-		(fields_autoplaced yes)
-		(stroke
-			(width 0.1524)
-			(type solid)
-		)
-		(fill
-			(color 0 0 0 0.0000)
-		)
-		(uuid "ebd50b7c-771d-43af-8f30-908c96e17caf")
-		(property "Sheetname" "serial_board"
-			(at 33.02 102.1584 0)
-			(effects
-				(font
-					(size 1.27 1.27)
-				)
-				(justify left bottom)
-			)
-		)
-		(property "Sheetfile" "serial_board.kicad_sch"
-			(at 33.02 139.0146 0)
-			(effects
-				(font
-					(size 1.27 1.27)
-				)
-				(justify left top)
-			)
-		)
-		(instances
-			(project "6502"
-				(path "/27fa70ec-70f1-4ec5-9aef-43afe5f03596"
-					(page "5")
-				)
-			)
-		)
-	)
-	(sheet_instances
-		(path "/"
-			(page "1")
-		)
-	)
-	(embedded_fonts no)
-)

design/arduino_board.kicad_sch

@@ -1,8 +0,0 @@
-(kicad_sch
-	(version 20250114)
-	(generator "eeschema")
-	(generator_version "9.0")
-	(uuid "024d9314-6101-4648-b6a9-60a4a09a2ede")
-	(paper "A4")
-	(lib_symbols)
-)

design/clock_board.kicad_sch

@@ -1,8 +0,0 @@
-(kicad_sch
-	(version 20250114)
-	(generator "eeschema")
-	(generator_version "9.0")
-	(uuid "ce8dcaa4-6718-4c1b-b3e3-a3e5483835b5")
-	(paper "A4")
-	(lib_symbols)
-)

design/cpu_board/cpu_board.kicad_pcb

@@ -0,0 +1,2 @@
+(kicad_pcb (version 20241229) (generator "pcbnew") (generator_version "9.0")
+)

design/cpu_board/cpu_board.kicad_prl

@@ -1,7 +1,7 @@
 {
   "board": {
     "active_layer": 0,
-    "active_layer_preset": "All Layers",
+    "active_layer_preset": "",
     "auto_track_width": true,
     "hidden_netclasses": [],
     "hidden_nets": [],
@@ -45,21 +45,21 @@
       "pads",
       "zones",
       "drc_warnings",
+      "drc_exclusions",
       "locked_item_shadows",
       "conflict_shadows",
       "shapes"
     ],
-    "visible_layers": "00000000_00000000_0fffffff_ffffffff",
+    "visible_layers": "ffffffff_ffffffff_ffffffff_ffffffff",
     "zone_display_mode": 0
   },
   "git": {
-    "repo_password": "",
     "repo_type": "",
     "repo_username": "",
     "ssh_key": ""
   },
   "meta": {
-    "filename": "6502.kicad_prl",
+    "filename": "cpu_board.kicad_prl",
     "version": 5
   },
   "net_inspector_panel": {

design/cpu_board/cpu_board.kicad_pro

@@ -204,7 +204,6 @@
       "bus_entry_needed": "error",
       "bus_to_bus_conflict": "error",
       "bus_to_net_conflict": "error",
-      "conflicting_netclasses": "error",
       "different_unit_footprint": "error",
       "different_unit_net": "error",
       "duplicate_reference": "error",
@@ -251,7 +250,7 @@
     "pinned_symbol_libs": []
   },
   "meta": {
-    "filename": "6502.kicad_pro",
+    "filename": "cpu_board.kicad_pro",
     "version": 3
   },
   "net_settings": {
@@ -298,7 +297,7 @@
   },
   "schematic": {
     "annotate_start_num": 0,
-    "bom_export_filename": "",
+    "bom_export_filename": "${PROJECTNAME}.csv",
     "bom_fmt_presets": [],
     "bom_fmt_settings": {
       "field_delimiter": ",",
@@ -319,41 +318,53 @@
           "name": "Reference",
           "show": true
         },
-        {
-          "group_by": true,
-          "label": "Value",
-          "name": "Value",
-          "show": true
-        },
-        {
-          "group_by": false,
-          "label": "Datasheet",
-          "name": "Datasheet",
-          "show": true
-        },
-        {
-          "group_by": false,
-          "label": "Footprint",
-          "name": "Footprint",
-          "show": true
-        },
         {
           "group_by": false,
           "label": "Qty",
           "name": "${QUANTITY}",
           "show": true
         },
+        {
+          "group_by": true,
+          "label": "Value",
+          "name": "Value",
+          "show": true
+        },
         {
           "group_by": true,
           "label": "DNP",
           "name": "${DNP}",
           "show": true
+        },
+        {
+          "group_by": true,
+          "label": "Exclude from BOM",
+          "name": "${EXCLUDE_FROM_BOM}",
+          "show": true
+        },
+        {
+          "group_by": true,
+          "label": "Exclude from Board",
+          "name": "${EXCLUDE_FROM_BOARD}",
+          "show": true
+        },
+        {
+          "group_by": true,
+          "label": "Footprint",
+          "name": "Footprint",
+          "show": true
+        },
+        {
+          "group_by": false,
+          "label": "Datasheet",
+          "name": "Datasheet",
+          "show": true
         }
       ],
       "filter_string": "",
       "group_symbols": true,
-      "include_excluded_from_bom": false,
-      "name": "Grouped By Value",
+      "include_excluded_from_bom": true,
+      "name": "Default Editing",
       "sort_asc": true,
       "sort_field": "Reference"
     },
@@ -399,28 +410,8 @@
   },
   "sheets": [
     [
-      "27fa70ec-70f1-4ec5-9aef-43afe5f03596",
+      "7997bb75-67c5-4059-a258-ca352fda42f5",
       "Root"
-    ],
-    [
-      "84677476-d952-4526-bbdb-640c00b36086",
-      "cpu_board"
-    ],
-    [
-      "1c85a34e-e029-471f-835a-c5cb1e337bcc",
-      "clock_board"
-    ],
-    [
-      "e6c14eea-6ae8-44d4-9ce7-edf7fac74b1a",
-      "arduino_board"
-    ],
-    [
-      "ebd50b7c-771d-43af-8f30-908c96e17caf",
-      "serial_board"
-    ],
-    [
-      "1d965ac9-0bec-4308-b34c-251844cc958f",
-      "lcd_board"
     ]
   ],
   "text_variables": {}

design/cpu_board/sym-lib-table

@@ -0,0 +1,5 @@
+(sym_lib_table
+  (version 7)
+  (lib (name "6502")(type "KiCad")(uri "C:/Users/Maxime Vorwerk/Documents/source/6502/design/6502.kicad_sym")(options "")(descr ""))
+  (lib (name "74xxLogic")(type "KiCad")(uri "C:/Users/Maxime Vorwerk/Documents/source/6502/design/74xxLogic.kicad_sym")(options "")(descr ""))
+)

design/fp-lib-table

@@ -1,4 +0,0 @@
-(fp_lib_table
-  (version 7)
-  (lib (name "Arduino")(type "KiCad")(uri "${KIPRJMOD}/arduino.pretty")(options "")(descr ""))
-)

design/lcd_board.kicad_sch

@@ -1,8 +0,0 @@
-(kicad_sch
-	(version 20250114)
-	(generator "eeschema")
-	(generator_version "9.0")
-	(uuid "5b260d0f-5fae-4ba4-b740-e25b9991caa6")
-	(paper "A4")
-	(lib_symbols)
-)

design/serial_board.kicad_sch

@@ -1,8 +0,0 @@
-(kicad_sch
-	(version 20250114)
-	(generator "eeschema")
-	(generator_version "9.0")
-	(uuid "f0424923-daf9-4b59-bbc7-48543f0e6d73")
-	(paper "A4")
-	(lib_symbols)
-)

design/sym-lib-table

@@ -1,5 +0,0 @@
-(sym_lib_table
-  (version 7)
-  (lib (name "6502")(type "KiCad")(uri "${KIPRJMOD}/6502.kicad_sym")(options "")(descr ""))
-  (lib (name "Arduino")(type "KiCad")(uri "${KIPRJMOD}/arduino.kicad_sym")(options "")(descr ""))
-)

design/~6502.kicad_pcb.lck

@@ -1 +0,0 @@
-{"hostname":"MAXIMESPC","username":"Maxime Vorwerk"}

notes/cpu.md

@@ -0,0 +1,16 @@
+# CPU board
+
+## Components
+- CPU: [W65C02](../datasheets/w65c02s.pdf)
+- RAM: [LY62256PL-5LL](../datasheets/LY62256PL-55LL.pdf)
+- ROM: [AT28C64B](../datasheets/AT28C64B.pdf)
+- Register: [74HC377](../datasheets/74HC_HCT377.pdf)
+
+## Register
+- Address 0x5FFF/0b0101_1111_1111_1111
+- decode using [74HC20](../datasheets/74HC20.pdf), [74HC00](../datasheets/74hc00.pdf) 
+- $b_{15},\dots,b_0$
+- $\overline E=\neg(b_0\land b_1\land b_2\land b_3)\land\neg(b_4\land b_5\land b_6\land b_7)\land\neg(b_8\land b_9\land b_{10}\land b_{11})\land\neg(b_{12}\land b_{14})\land (b_{13}\lor b_{15})$
+
+## Timings
+- PHI2 target: 10MHz -> 100ns

notes/ethernet.md

@@ -0,0 +1,2 @@
+# Ethernet
+- [ENC28J60](./../datasheets/ENC28J60.pdf)

notes/memory-layout.md

@@ -2,6 +2,7 @@
 - bank switching using 8-Bit register
 - top 32K remain untouched
 
+# [CPU](./cpu.md)
 | start  | end    | use                     |
 | :----- | :----- | :---------------------- |
 | 0x0000 | 0x5FFE | RAM                     |
@@ -9,7 +10,7 @@
 | 0x6000 | 0xDFFF | --- to be mapped ---    |
 | 0xE000 | 0xFFFF | ROM                     |
 
-# Default (0X00)
+# I/O (0x00)
 | start  | end    | use |
 | :----- | :----- | :-- |
 | 0x6000 | 0xDFFF | I/O |