How do I install the Target Cpm skill?

Run npx skillmds@latest add z88dk/target-cpm in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Target Cpm safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Target Cpm?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Target Cpm free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Target Cpm?

z88dk (@z88dk) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Target Cpm by z88dk — Agent Skill

Name: Target Cpm
Author: z88dk

File contents

Target — CP/M (`+cpm`)


Config	`lib/config/cpm.cfg`
Tree	`libsrc/target/cpm/` (classic + newlib share tree; list isolation)
Wiki	`wiki/platforms/Platform---CPM.md`
Help	`zcc +cpm -h` (authoritative subtype list)

Two worlds (do not mix cores)

	Classic	Newlib
Select	default / `-clib=default` / `8080` / `8085` / `z180` / `ixiy` / `ansi`	`-clib=new` / `sdcc_ix` / `sdcc_iy`
CRT	`lib/target/cpm/classic/cpm_crt0`	`libsrc/target/cpm/cpm_crt.asm.m4`
Lib	`-lcpm_clib`, `-lcpm8085_clib`, …	`-lcpm` + sccz80/sdcc_ix clibs
Headers	`include/`	`include/_DEVELOPMENT/common/`
Disk	classic FCB fcntl	newlib FCB (`asm_target_open_*`); FatFs separate optional stack
CPUs	multi (Z80, 8080, 8085, Z180, …)	Z80-class only

Hard rule: one open owner per binary. Do not link classic fcntl with newlib cpm_01_file. See libsrc/target/cpm/README-mixed-tree.md.

Subtypes

Mostly disc / packaging (-Cz+cpmdisk, .com), not “newlib selector”.
Default subtype → .com-style (-Cz+newext … .com).
Some subtypes force CPU/clib (e.g. 8080 machines, bondwell2 → ixiy). Read the subtype line in cpm.cfg.
Suites: prefer default subtype only unless a specific machine is in scope (library-newlib / methodology-measure).

Recipes

zcc +cpm -vn hi.c -o hi -create-app              # classic Z80 → .com
zcc +cpm -clib=8085 -vn hi.c -o hi -create-app
zcc +cpm -clib=new -vn hi.c -o hi
zcc +cpm -clib=sdcc_iy -vn hi.c -o hi -create-app
zcc +cpm -clib=8085 --math32 …                   # math32_8085 via ZCC_LIBCPU

Agent checklist

Confirm classic vs newlib before editing CRT/stdio/fcntl.
8085 CP/M is classic — no newlib product.
Do not fan out 100+ subtypes in tests.
Related skills: library-classic, library-newlib, cpu-8085, tool-appmake.

---name: target-cpmdescription: z88dk +cpm only: classic vs newlib CP/M, clib/CPU variants (8080/8085/z180), subtypes as packaging (not “newlib”), FCB disk, .com builds. Use when the task is explicitly +cpm / CP/M, not generic targets.---# Target — CP/M (`+cpm`)| | ||--|--|| Config | `lib/config/cpm.cfg` || Tree | `libsrc/target/cpm/` (classic + newlib share tree; **list isolation**) || Wiki | `wiki/platforms/Platform---CPM.md` || Help | `zcc +cpm -h` (authoritative subtype list) |## Two worlds (do not mix cores)| | Classic | Newlib ||--|---------|--------|| Select | default / `-clib=default` / `8080` / `8085` / `z180` / `ixiy` / `ansi` | `-clib=new` / `sdcc_ix` / `sdcc_iy` || CRT | `lib/target/cpm/classic/cpm_crt0` | `libsrc/target/cpm/cpm_crt.asm.m4` || Lib | `-lcpm_clib`, `-lcpm8085_clib`, … | `-lcpm` + sccz80/sdcc_ix clibs || Headers | `include/` | `include/_DEVELOPMENT/common/` || Disk | classic FCB fcntl | newlib FCB (`asm_target_open_*`); FatFs separate optional stack || CPUs | multi (Z80, 8080, 8085, Z180, …) | **Z80-class only** |**Hard rule:** one `open` owner per binary. Do not link classic fcntl with newlib `cpm_01_file`. See `libsrc/target/cpm/README-mixed-tree.md`.## Subtypes- Mostly **disc / packaging** (`-Cz+cpmdisk`, `.com`), **not** “newlib selector”.- Default subtype → `.com`-style (`-Cz+newext … .com`).- Some subtypes **force** CPU/clib (e.g. 8080 machines, `bondwell2` → ixiy). Read the subtype line in `cpm.cfg`.- Suites: prefer **default** subtype only unless a specific machine is in scope (`library-newlib` / `methodology-measure`).## Recipes```textzcc +cpm -vn hi.c -o hi -create-app # classic Z80 → .comzcc +cpm -clib=8085 -vn hi.c -o hi -create-appzcc +cpm -clib=new -vn hi.c -o hizcc +cpm -clib=sdcc_iy -vn hi.c -o hi -create-appzcc +cpm -clib=8085 --math32 … # math32_8085 via ZCC_LIBCPU```## Agent checklist1. Confirm **classic vs newlib** before editing CRT/stdio/fcntl. 2. 8085 CP/M is **classic** — no newlib product. 3. Do not fan out 100+ subtypes in tests. 4. Related skills: `library-classic`, `library-newlib`, `cpu-8085`, `tool-appmake`.

Frequently asked questions

Target Cpm