the package dev86 is missing from e.g. http://download.fedora.redhat.com/pub/fedora/linux/core/1/i386/os/Fedora/RPMS/
The package dev86 was removed from Fedora Core 1. /* "dev86 รข No longer required to build any included software" This is mentioned in the release notes of Fedora Core 1 http://download.fedora.redhat.com/pub/fedora/linux/core/1/i386/os/RELEASE-NOTES.html */