add python script to clear drives B to P of the cpm.img

add zip that contains a cpm.img file that can be mounted from the Mister games/MultiComp directory this img has CP/M and the G Searl download program pre configured

CPM-sd-image/clear-drive-B-to-P.py

@@ -0,0 +1,34 @@
+import os
+import sys
+
+def clear_drive(f, drive_offset, drive_size):
+    # Clear directory entries
+    f.seek(drive_offset)
+    empty_dir_entry = b'\xE5' * 32  # CP/M uses 0xE5 to mark unused directory entries
+    for _ in range(512):  # 512 directory entries per drive
+        f.write(empty_dir_entry)
+    
+    # Zero out the rest of the drive
+    remaining_size = drive_size - (32 * 512)
+    f.write(b'\x00' * remaining_size)
+
+def zero_drives_and_clear_directories(image_path, start_drive='B', end_drive='P'):
+    drive_size = 8 * 1024 * 1024  # 8 MB per drive
+
+    with open(image_path, 'r+b') as f:
+        for drive in range(ord(start_drive), ord(end_drive) + 1):
+            drive_offset = (drive - ord('A')) * drive_size
+            clear_drive(f, drive_offset, drive_size)
+
+if __name__ == "__main__":
+    image_path = "cpm.img"  # Corrected default image file name
+    
+    if len(sys.argv) > 1:
+        image_path = sys.argv[1]
+    
+    if not os.path.exists(image_path):
+        print(f"Error: File '{image_path}' not found.")
+        sys.exit(1)
+    
+    zero_drives_and_clear_directories(image_path)
+    print(f"Drives B through P in {image_path} have been cleared and zeroed.")