you need the small repair i posted earlier
for /sys/src/cmd/aux/vga/3dfx.c (it was
wrong before but not noticed).

term% yesterday -d 3dfx.c
diff /n/dump/2002/04291/sys/src/cmd/aux/vga/3dfx.c 3dfx.c
30c30
< 	ulong	r[Nior/4];
---
> 	ulong	r[Nior];


much good it does you before installation, but once it appears
in the downloadable floppy image, you can proceed.
i can generate one myself if you're in a great hurry, but otherwise
i thought the fewer variants in flight at this stage, the less
confusing it would be.