hexdump.exe - Display a file in hex+ASCII format; or display Standard ASCII chart or Extended ASCII chart.

hexdump.zip is a FreeDOS package containing hexdump.exe (and sources).

To install: fdinst install hexdump.zip. To install with sources: fdnpkg install-wsrc hexdump.zip

The Standard ASCII chart (characters 0-127) and the Extended ASCII chart (characters 128-255) will each fit on an 80x24 screen. A binary table of values 0-0xF is also printed with each ASCII chart.

hexdump.exe was created to run on (16-bit) FreeDOS, but can also be built to run on (64-bit) Linux. When built on Linux, it is named hexd in order to avoid conflicting with the existing hexdump command.

On Linux, the characters displayed on the Standard and Extended ASCII chart are UTF-8 representations of DOS Code Page 437; on DOS, the characters displayed depend on the Code Page that is loaded.

hexdump.exe (and hexd) gives exactly the same output as the Linux command hexdump -v -C

Building

On Linux:

./build.sh clean     Remove generated files
./build.sh hexd      Build the hexd executable
./build.sh zip       (Optional) Store files for FreeDOS in h.zip

To transfer source files to FreeDOS, you can copy h.zip and unzip it, or copy the FreeDOS package hexdump.zip and run fdnpkg install-wsrc hexdump.zip. Either method will work.

On FreeDOS:

>build.bat clean     Remove generated files
>build.bat hexdump   Build hexdump.exe
>build.bat pkg       Build FreeDOS package hexdump.zip

On FreeDOS, 'hexdump' is built using the Open Watcom C compiler, but build.bat can easily be modified to use a different C compiler.