Add script to find addresses available for arbitrary read/write

reverse_engineering/delco/vw_premium_5/scripts/exposed_addresses.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+#
+# Print the range of accessible addresses around each address in the 
+# exposed_addresses table, then combine them to print all contiguous
+# areas in memory that can be accessed.
+#
+
+# address words in the exposed_addresses table at 0xB190 in software23.asm
+exposed_addresses = sorted(set([
+    0xB190,
+    0xB1B5,
+    0xAF70,
+    0xAF70,
+    0xFE30,
+    0xAF70,
+    0xFB56,
+    0xF225,
+    0xFE57,
+    0xF257,
+    0xFE43,
+    0xFBAC,
+    0xF1B3,
+    0xAF70,
+    0xF1B9,
+    0xFE4C,
+    0xFE44,
+    0xFC75,
+]))
+
+# find all accessible addresses around each exposed address 
+# and mark them as exposed in the 64K memory space
+memory = [False] * 65536
+for exposed_address in exposed_addresses:
+    lowest_address = exposed_address - 128
+    highest_address = exposed_address + 127
+
+    print("%04X: %04X - %04X" % (exposed_address, lowest_address, highest_address))
+
+    for address in range(lowest_address, highest_address+1, 1):
+        memory[address] = True # exposed
+print()
+
+# find all contiguous areas in memory that can be accessed
+ranges = []
+current_range = None
+for address, exposed in enumerate(memory):
+    if exposed:
+        if current_range is None:
+            current_range = [address, address] # low, high 
+            ranges.append(current_range)
+        else:
+            current_range[1] = address
+    else:
+        current_range = None 
+
+for r in ranges:
+    print("%04X - %04X" % (r[0], r[1]))