You can browse the flashprog source code online, or download and install flashprog and/or its source code as explained below.

Installation from source

Requirements:

pkg-config to find library dependencies
pciutils development package (pciutils-dev/libpci-dev/pciutils-devel, depending on OS/distribution)
zlib development package (zlib1g-dev/zlib-devel, depending on OS/distribution)
libftdi 1.0 development package (libftdi1-dev/libftdi-dev), optional support for various external FT2232SPI flashers
libusb 1.0 development package (libusb-1.0-0-dev), optional support for various USB-based programmers
libjaylink development package (libjaylink-dev), optional support for J-LINK programmers
libgpiod development package (libgpiod-dev), optional support for GPIO bitbanging under Linux
various build utilities like meson or make, gcc etc. (build-essential or similar depending on OS/distribution)
git (if you check out the source and build manually)

Git

The flashprog repository is hosted on sourcearcade.org. All current development happens on the main branch.

TBD