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 # TODO
 
+- Implement RAM symbol mapping from raw addresses found in the instructions like
+  LEA, MOVE and address arithmetic instructions. Basically any direct RAM
+  address accessed directly may be mapped as symbol. A hashmap is most like
+  necessary for this.
 - Implement CLI option that can be used to specify regions of RAM and IO
   registers. Custom ROM location and size is still not the case, only 4MiB at
   the base `0x00000000` is supported and it remains.
-- Implement address substitution with some symbol instead of raw offset on all
-  instructions, that support `Word`, `Long`, `(d16,PC)` or relative displacement
-  addressing modes. Also substitute `immediate` values if they are look like an
-  address in the RAM, or other predefined location, but not ROM. Assume 24 bit
-  address space.