> For the complete documentation index, see [llms.txt](https://docs.hex-rays.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hex-rays.com/ida-9.5/core/disassembler/disassembly-gallery/8051-disassembler.md). # 8051 Disassembler Assembler code ```armasm code:0000019C .byte 0 code:0000019D .byte 0xFF ; ÿ code:0000019E .byte 0xF5 ; õ code:0000019F .byte 0xFF ; ÿ code:000001A0 ; --------------------------------------------------------------------------- code:000001A0 mov RESERVED00FF, R0 ; RESERVED code:000001A2 mov RESERVED00FF, R1 ; RESERVED code:000001A4 mov RESERVED00FF, R2 ; RESERVED code:000001A6 mov RESERVED00FF, R3 ; RESERVED code:000001A8 mov RESERVED00FF, R4 ; RESERVED code:000001AA mov RESERVED00FF, R5 ; RESERVED code:000001AC mov RESERVED00FF, R6 ; RESERVED code:000001AE mov RESERVED00FF, R7 ; RESERVED code:000001B0 mov RESERVED00FF, RAM_0 ; RESERVED code:000001B3 mov RESERVED00FF, RESERVED00FF ; RESERVED code:000001B6 mov RESERVED00FF, @R0 ; RESERVED code:000001B8 mov RESERVED00FF, @R1 ; RESERVED code:000001BA mov RESERVED00FF, #0 ; RESERVED code:000001BD mov RESERVED00FF, #0xFF ; RESERVED code:000001C0 mov @R0, #0 code:000001C2 mov @R0, #0xFF code:000001C4 mov @R0, RAM_0 code:000001C6 mov @R0, RESERVED00FF ; RESERVED code:000001C8 mov @R0, A code:000001C9 mov @R1, #0 code:000001CB mov @R1, #0xFF code:000001CD mov @R1, RAM_0 code:000001CF mov @R1, RESERVED00FF ; RESERVED code:000001D1 mov @R1, A code:000001D2 mov C, RAM_20.0 code:000001D4 mov C, P5.7 ; Port 5 code:000001D6 mov RAM_20.0, C code:000001D8 mov P5.7, C ; Port 5 code:000001DA mov DPTR, #0xFF code:000001DD mov DPTR, #0xFF00 ``` --- # 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 by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://docs.hex-rays.com/ida-9.5/core/disassembler/disassembly-gallery/8051-disassembler.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. 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.