R. Belmont, you may have got around to it by now but here's a collection of Rendition Vérité V1000 / V2x00 microcode ".UC" files I extracted from VOGONSDrivers Rendition collection (found here: http://vogonsdrivers.com/index.php?catid=18
Rendition Vérité .UC collection: http://www.mediafire.com/file/01ciw6qaq393w8z/rendition-uc.zip/file
I did not take the time to separate the files per each graphics chip (V1000-E, V1000L-P, V2100, V2200) or card manufacturer. I simply extracted all the drivers, found all the .UC files, de-duped by CRC32, and then renamed in order by filedate. You can somewhat guess which chipset family by filename and date.
I am not sure how these are loaded but it's probably via the drivers. (see VOGONSDrivers Rendition collection.) Some drivers come with one, two, three, even four .UC files, I am not sure whether they are switched out or appended to each other inside the chip or what.
The VOGONSDrivers collection also has a few video card BIOS firmware updater utilities in the mix too. I have not included these, but they are available on VOGONSDrivers.
As R. Belmont recently said, "the Rendition Verite GPU (is) apparently is a MIPS with some custom instructions and no actual hardware to accelerate drawing. kind of a severely downgraded RSP/RDP combination."http://fabiensanglard.net/vquake/index.html
I've heard the Rendition comment about being some sort of microcoded MIPS before and often assumed so due to its weird "foobar.uc" files that it loads as part of the drivers, smells very much of firmware, and uc being "microcode". There's some reasonably good PDF files on the later Vérité. ("Good" - I mean, as these things go.) We have the Vérité V2200 technical specifications (69 pages) but not for the earlier V1000 nor the V2100. V2200 is backwards compatible with V1000 tho to a large degree.
Vérité V2200 technical specifications: http://vogonsdrivers.com/getfile.php?fileid=324&menustate=0
There's more things where that came from, especially of higher-level stuff (the SDKs) so let me know then.