The NEC VRC4375 platform, based on the NEC VR4300 is supported by both eCos and RedBoot.
Device drivers are included for:
According to NEC, this board is no longer available. You may wish to contact NEC directly for suitable options:
NEC Electronics Inc, USA
Source code for both eCos and RedBoot is available publically from eCos releases 2.0 and onwards, as well as from the anonymous CVS repository.
Instructions for installing RedBoot on the DDB-VRC4375 can be found in the RedBoot User's Guide. Board specific instructions, including installation instructions can be found here within the User's Guide.
Instructions for installing and using eCos on the DDB-VRC4375 are available here.
The most recent version of the full documentation set may be found on-line here.