init files

.gitignore

@@ -0,0 +1 @@
+*.bin

6502-reader/6502-reader.ino

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+const char ADDR[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };
+//  { A15, A14, A13, A12, A11, A10, A9, A8, A7, A6, A5, A4, A3, A2, A1, A0 }
+
+const char DATA[] = { 16, 17, 18, 19, 20, 21, 22, 26 };
+//                  { D7, D6, D5, D4, D3, D2, D1, D0 }
+
+#define CLOCK 28
+#define RW 27
+
+void setup() {
+  for (int n = 0; n < 16; n += 1){
+    pinMode(ADDR[n], INPUT);
+  }
+  for (int n = 0; n < 8; n += 1){
+    pinMode(DATA[n], INPUT);
+  }
+  pinMode(CLOCK, INPUT);
+  pinMode(RW, INPUT);
+  attachInterrupt(digitalPinToInterrupt(CLOCK), onClock, RISING);
+  Serial.begin(57600);
+}
+
+void loop() {
+  
+}
+
+void onClock() {
+  char output[15];
+  unsigned int address = 0;
+  for (int n = 0; n < 16; n += 1){
+    int bit = digitalRead(ADDR[n]) ? 1 : 0;
+    Serial.print(bit);
+    address = (address << 1) + bit;
+  }
+  Serial.print("   ");
+  unsigned int data = 0;
+  for (int n = 0; n < 8; n += 1){
+    int bit = digitalRead(DATA[n]) ? 1 : 0;
+    Serial.print(bit);
+    data = (data << 1) + bit;
+  }
+  sprintf(output, "   %04x  %c %02x", address, digitalRead(RW) ? 'r' : 'W', data);
+  Serial.println(output);
+}

makerom.py

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+rom_size = 32768
+rom = bytearray([0xea] * rom_size)
+
+rom[0] = 0xa9 # load to a Register
+rom[1] = 0x42
+
+rom[2] = 0x8d # write a register to memory
+
+# address 6000
+rom[3] = 0x00
+rom[4] = 0x60
+
+# address 8000 - little endien
+rom[0x7ffc] = 0x00
+rom[0x7ffd] = 0x80
+
+with open("rom.bin", "wb") as file: 
+    file.write(rom)