Need an Introduction to Tiny Core? Or peruse Core Concepts.
$ sudo modprobe agpgart$ sudo modprobe intel-agp$ sudo modprobe drm$ startx
Xorg should load those by itself. The fact it doesn't do it for you is definitely a bug.I would put those modprobes to /opt/bootlocal.sh, without sudo, because that file is executed as root every boot.
As a temporary workaround, I made a new version of graphics-2.6.26.tcem. Loading it will cause drm, agp, and hopefully also your agp chipset modules to become loaded.Could you test?