---
name: "cmddump"
section: "1"
platform: "linux"
package: "xtrs"
version: "4.9d-2.1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/cmddump"
---

# cmddump(1)

simulated TRS-80 CMD file loader

## Name

**cmddump** - simulated TRS-80 CMD file loader

## Synopsis

**cmddump** \[**-d**\] \[**-i** *n*\] \[**-m**\] \[**-p** *entry*\] \[**-q**\] \[**-s**\] \[**-t**\] \[**-x**\] *infile* \[*outfile startbyte nbytes*\]

## Description

**cmddump** displays information about TRS-80 DOS CMD (binary executable) files. It takes a mandatory input CMD file *infile,* and an optional triplet of arguments: an output file *outfile*, a starting offset of *startbyte* into the CMD file *infile*, and a number of bytes to dump, *nbytes*. If *startbytes* is specified, the given byte range is dumped from the simulated memory after loading.

The numeric arguments, including that to the option **-i**, may be given in any format recognized by [**strtol**(3)](/strtol/3.md); in other words, traditional C literals for decimal, octal, and hexadecimal.

## Options

The optional arguments and their parameters direct **cmddump** as follows.

- **-d**

  print detailed map; same as **-m**, but do not coalesce adjacent blocks

- **-i** *n*

  select ISAM entry *n*

- **-m**

  print running load map as file is parsed, coalescing adjacent blocks (implies **-t**); default

- **-p** *entry*

  select PDS entry *entry*; **cmddump** will truncate or right-pad *entry* with spaces, as needed, to the required fixed field width

- **-q**

  quiet; turns off **-d**, **-m**, **-s**, and **-t** (later flags can override)

- **-s**

  print summary load map after file is parsed

- **-t**

  print text of module headers, PDS headers, patch names, and copyright notices

- **-x**

  ignore anything after the first transfer address

## Author

**cmddump** was written by Timothy Mann.

## See also

[**xtrs**(1)](/xtrs/1.md)

The *LDOS Quarterly*, April 1, 1982 (Vol 1, No 4) ⟨http://\\:www.tim-mann.org/\\:misosys.html⟩, has documentation of the TRS-80 DOS CMD file format.