library-am9511 skillA
library-am9511 is agent-read markdown (skill) from feilipu/8085-skills: Am9511A (Intel 8231A) APU float library: IEEE host format vs APU format, pushf/popf status mapping, IEEE-side specials, classic/newlib link flags, multi-product rebuild. Use when editing libsrc/math/float/am9511, APU I/O, or measuring --math-am9511 / --am9511..
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
# Library — am9511 (Am9511A APU)
Home: `libsrc/math/float/am9511/`.
Product docs of record: `libsrc/math/float/am9511/readme.md`.
**Vendor datasheets / app notes (canonical):** external repo
[z88dk/techdocs](https://github.com/z88dk/techdocs) → **`amd/am9511a/`**
(not under this product tree).
## When to load this skill
- Editing `asm/am32_*.asm`, `asm/z80/` or `asm/8085/` push/pop/classify, or `am32_fspecial.asm`
- Wiring `--math-am9511` / `--am9511` / `--am9511h`
- Debugging Inf/NaN, divide-by-zero, sqrt(neg), or wrong zero after APU ops
- Comparing am9511 vs math32 TIMER (hardware APU vs software float)
## Link / flags
| Audience | Typical flags |
|----------|----------------|
| Classic z80 | `--math-am9511` or `--am9511`; needs APU at the port map in config |
| Classic 8085 | `--math-am9511` with `-clib=8085` (`-lam9511@{ZCC_LIBCPU}` → `am9511_8085`). There is no `--math-am9511_8085` alias |
| Classic helper | `--am9511h` → `am9511h.lib` (same z80 sources, `-D__AM9511_HELPER_FUNC`) |
| Newlib | `--am9511` / `-lam9511` with IEEE float mode as in readme (z80 clib only) |
…Read the whole file at its exact version.
How to install
mdr add feilipu/8085-skills/library-am9511@git:20260918.95c4588mdr add feilipu/8085-skills/library-am9511@sha256:67448553b72e4109Pin 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_jgpwkq2s3ovfwwok)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260918.95c4588 latest | 2026-09-18 | 95c4588 | 12,955 B | A | view · diff |
| git:20260821.71d8484 | 2026-08-21 | 71d8484 | 12,469 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 (12955 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_jgpwkq2s3ovfwwok GET https://markdownregistry.com/api/v1/resolve?ref=feilipu/8085-skills/library-am9511 GET https://markdownregistry.com/api/v1/blob/67448553b72e41099dd0b05aed4e2a927255a8a4e05222f27eadf8b21c9c4bd3
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