> 
> Okay, I'm glad to note that iteconfig -w 640 -h 480 -d 4 puts me in 
> TT-med.  Trying iteconfig -w 720 -h 480 -d 1 complains that St_pool_mem 
> is exhausted.. Hmm..
As a TT-med is about 150Kb and a ST-high 30Kb, you are likely to run into
the St-pool limit. A new display is fully allocated before the old one
will be released, so you need some slack when switching screens. You
can enlarge the st_mem_pool by binpatch(1)-ing it, or defining ST_POOL_SIZE
to be big enough in the config file you are using to build the kernel.

> 
> By the way it seems that output in X is much speedier than the regular 
> 'text' mode.
I guess the ite-code could be better optimized, if I only had the time....
> 
> Also, how about using the X fonts (small fonts) for 'text' mode.
You can try the 8x8 font. This is a kernel config option.

Leo.