https://bugs.freedesktop.org/show_bug.cgi?id=64257
--- Comment #50 from Alex Deucher agd5f@yahoo.com --- 6xx has a max tex/vtx clause size of 8. 7xx+ has a max tex/vtx clause size of 16.
In CF_WORD1, make sure you are setting the MSB of the count field. Bits 12:10 and bit 19 make up the total count field. I suspect you are not setting bit 19 properly.