The Toshiba JMR-TX3904A platform, based on the Toshiba TX39 TMPR3904AF is supported by eCos.
Device drivers are included for:
According to Toshiba, the JMR-TX3904A has been "sales terminated", but you may still wish to try contacting Toshiba:
Toshiba America Electronic Components,
The Toshiba JMR-TX3904A platform is supported by eCos from public releases 1.1 and onwards in addition to being available from the anonymous CVS repository.
Instructions for installing and using eCos on the JMR-TX3904A are available here.
The most recent version of the full documentation set may be found on-line here.