compiler-ac85 skillA
compiler-ac85 is agent-read markdown (skill) from feilipu/8085-skills: Agent compiler for Intel 8085 (ac85): emit Zilog assembly for z88dk-z80asm -m8085 from standard C90. Data model, SMALLC ABI, stack frames, HL as ALU bus, BC/DE parking, 8085 extended ops, C90 shape → ISA lowering. Use for /compiler-ac85, "agent compiler 8085", "C compiler guide for 8085", "compile this C to 8085 assembly", "8085 C lowering". Do not use when invoking zcc, 80cc, or sccz80 as the compiler, or when editing src/80cc (those are compiler-80cc, compiler-sccz80, tool-zcc)..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# C compiler guide — 8085 Compile **ISO C90** to **Zilog** 8085 assembly that `z88dk-z80asm -m8085` accepts. Load **`cpu-8085`** for the opcode map, flag effects, timings, and stack-access sequences. This card is the **C** layer: types, ABI, register assignment, and how C constructs map onto that ISA. Optimise from the **8085 instruction set**, not from Z80 habit. Extended ops (`ld de,sp+*`, `ld hl,(de)`, `ld (de),hl`, `sub hl,bc`, `rl de`, `sra hl`, `jp k` / `jp nk`) are first-class on every 8085. There is no IX, no `exx`, no native `djnz`, and no 2-byte `jr` (`18` is `rl de`). Assembler `jr` becomes a 3-byte `jp`. **8085-only listings write `jp`.** Dual-CPU library source may write `jr` (`cpu-8085`). **Shape before statements.** Name the C90 shape in a function (walking byte array, word swap, pre-dec-to-zero, struct cursor, …) and emit the ISA sequence for that shape. Do not lower a naïve `a[i]` / `i++` form when the shape is a pointer walk or an induction. ## C data model on 8085 Default **`char` is signed**. Little-endian. Integer promotions go to 16-bit `int`. `short` is 16-bit (same home as `int`). Struct members: `offset += size` (no 2-byte ABI holes). …
Read the whole file at its exact version.
How to install
mdr add feilipu/8085-skills/compiler-ac85@git:20260921.85b9514mdr add feilipu/8085-skills/compiler-ac85@sha256:c0611bf9ed9f10d6Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_vb6csfbmil7cesbl)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260921.85b9514 latest | 2026-09-21 | 85b9514 | 65,417 B | A | view · diff |
| git:20260921.2f39ee6 | 2026-09-21 | 2f39ee6 | 64,958 B | A | view · diff |
| git:20260920.88ac0a1 | 2026-09-20 | 88ac0a1 | 62,676 B | A | view · diff |
| git:20260920.d893132 | 2026-09-20 | d893132 | 61,204 B | A | view · diff |
| git:20260919.24cc48b | 2026-09-19 | 24cc48b | 45,005 B | A | view · diff |
| git:20260919.216763a | 2026-09-19 | 216763a | 43,321 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (65417 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
feilipu/8085-skills · 3 stars · license MIT · pushed 2026-09-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_vb6csfbmil7cesbl GET https://markdownregistry.com/api/v1/resolve?ref=feilipu/8085-skills/compiler-ac85 GET https://markdownregistry.com/api/v1/blob/c0611bf9ed9f10d6f1fe07cc5b5588148401967bdb56a846feb6f49bace508e4
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