> For the complete documentation index, see [llms.txt](https://ersanio.gitbook.io/assembly-for-the-snes/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ersanio.gitbook.io/assembly-for-the-snes/the-basics/shorter-addresses.md). # Shorter addresses It's possible to shorten addresses, but there are prerequisites. In order to shorten a long RAM address into an absolute (4-digit) address, the address has to be between $7E0000-$7E1FFF. $7E1234 can be shortened to $1234 for example. If you shorten address $7E2000 or higher into a 4-digit address, you'll write to areas other than the RAM. It has to do with the data bank register and the SNES memory map. If you want to shorten long RAM addresses to a direct page (2-digit) address, the high and low bytes of the long address must never exceed the value $00FF. The address you want to store to must be in bank $00 or $7E. So you can shorten `LDA $7E0001` to `LDA $01` and `STA $000001` to `STA $01`. It's often necessary to write shorter addresses as parameters, as certain opcodes don't support certain addressing modes. For example, the STZ opcode does not support long addresses, so you can't write `STZ $7E1234`. You'll have to write `STZ $1234` instead. Keep in mind that when you use 2 digits for loading and storing, the bank is always $00 by default, regardless of the data bank! You can use 2-digit addresses for RAM addresses $7E0000-$7E00FF, because RAM $7E0000-$7E1FFF is mirrored in banks $00-$3F by default. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://ersanio.gitbook.io/assembly-for-the-snes/the-basics/shorter-addresses.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.